CORTECH INC
PRRN14A, 1998-07-27
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                            SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934
                                (Amendment No. )

Filed by the Registrant |_|
Filed by a Party other than the Registrant |X|

Check the appropriate box:

|X| Preliminary Proxy Statement
|_| Definitive Proxy Statement
|_| Definitive Additional Materials
|_| Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12


                                 Cortech, Inc.
- --------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

                      Asset Value Fund Limited Partnership
- --------------------------------------------------------------------------------
                   (Name of Person(s) Filing Proxy Statement)

Payment of Filing Fee (Check the appropriate box):

|_| $125 per Exchange Act Rule 0-11(c)(1)(ii), 14a-6(i)(1) or 14a-6(j)(2).
|_| $500 per each party to the controversy pursuant to
    Exchange Act Rule 14a-6(i)(3).
|_| Fee computed on table below per Exchange Act Rules 14a-6(i)(4) and 0-11.
|X| No fee required

1) Title of each class of securities to which transaction applies:

   Common Stock
   -----------------------------------------------------------------------------

2) Aggregate number of securities to which transaction applies:

   -----------------------------------------------------------------------------

3) Per unit price or other underlying value of transaction computed
   pursuant to Exchange Act Rule 0-11:*

   -----------------------------------------------------------------------------

4) Proposed maximum aggregate value of transaction:

   -----------------------------------------------------------------------------

|_| Check box if any part of the fee is offset as provided by
    Exchange Act Rule 0-11(a)(2) and identify the filing for which
    the offsetting fee was paid previously.  Identify the previous
    filing by registration statement number, or the form or schedule
    and the date of its filing.

    1) Amount previously paid:
                               -------------------------------------------------
    2) Form, Schedule or Registration No.
                                         ---------------------------------------

    3) Filing party:
                    ------------------------------------------------------------

    4) Date filed:
                    ------------------------------------------------------------

___________
*Set forth the amount on which the filing fee is calculated and state how it was
 determined.

(032796DTI)

<PAGE>

REVISED PRELIMINARY OPPOSITION PROXY STATEMENT                     July __, 1998

                         ANNUAL MEETING OF STOCKHOLDERS
                  OF CORTECH, INC. ("Cortech" or "the Company")

             ASSET VALUE FUND LIMITED PARTNERSHIP ("Asset Value 1")
                        (a Delaware limited partnership)
   
     This Proxy  Statement and the enclosed green proxy ballot (the "Green Proxy
Ballot")  are  being  sent  by  Asset  Value  on or  about  __________,  1998 in
connection   with  its   solicitation  of  proxies  at  the  Annual  Meeting  of
Stockholders  being held by Cortech at 9:00 a.m.  local time at the  Renaissance
Hotel,  3801  Quebec  Street,  Denver,   Colorado  on  September  4,  1998  (the
"Meeting").
    

     THIS  MEETING WAS ORDERED BY THE  CHANCERY  COURT OF DELAWARE  ONLY AFTER A
LAWSUIT WAS FILED BY ASSET VALUE TO COMPEL THE MEETING.

   
     Effective  July 21, 1998,  three members of the old Board (the "Old Board")
resigned after appointing their  replacements (the "Appointed  Board").  Cortech
has stated  that the  departures  did not  result  from  disagreements  with the
Company.  There has been no explanation of why the incumbents did not wait until
their  successors were chosen by the  stockholders at the Meeting on September 4
which  would  have  permitted  stockholders  an  opportunity  to  elect  the new
Directors.

     At the Meeting,  management  proposes to elect one  director,  unless Asset
Value succeeds in expanding the Board,  in which event,  management  proposes to
elect three additional directors. Management opposes the expansion of the Board.
Management  also  proposes to  eliminate a  stockholder's  right to increase the
number of directors  ("Elimination of Stockholders Right"); to reverse split the
outstanding  shares of Cortech Stock,  one for four (the "Reverse Stock Split");
and to ratify Arthur  Andersen LLP as  independent  auditors for the fiscal year
ending December 31, 1998. Asset Value favors the expansion of the Board;  favors
the Reverse Stock Split;  favors the  ratification of Arthur  Andersen,  LLP and
opposes management's slate and the Elimination of Stockholders Right.

     Asset  Value  and  two  other  investors  own   approximately  15%  of  the
outstanding  common  stock of Cortech  (Cortech  Stock),  making them by far the
largest  stockholders.   Under  the  Certificate  of  Incorporation  and  Bylaws
currently  in  effect,  the  Cortech  board  has four  members  whose  terms are
staggered  so that no more than two terms  expire in any one year.  A  staggered
board,  sometimes  referred to as a classified  board, is an obstacle to gaining
control of the Board in any one year.

     Asset  Value  will  seek to gain  control  of  Cortech  at the  Meeting  by
proposing to amend the Bylaws to increase  the number of directors  from four to
seven  (the  "Board  Amendment")  and  subject  to the  approval  of  the  Board
Amendment,  to elect its four nominees as directors  (the one vacancy  available
under the current Bylaws plus the three vacancies created by the Board
- --------
     1    Asset Value is a Delaware limited partnership which is wholly-owned by
Kent Financial  Services,  Inc., a Delaware  corporation  ("Kent") the shares of
which are  publicly  traded on NASDAQ  under the symbol  KENT.  Asset  Value was
organized  in  September,  1990 for the  purpose  of  investing  in  securities,
principally marketable securities.  Additional information about Asset Value and
its  management  and about  Kent and the names of its  officers,  directors  and
controlling  stockholders and their ownership interests is presented on Schedule
1 of this Proxy Statement.


<PAGE>



Amendment). If the Board Amendment is approved and four Asset Value nominees are
elected,  Asset  Value's  nominees  will  constitute a majority of the Board and
therefore control of Cortech will transfer to Asset Value.

     If the Board  Amendment is not approved,  Asset Value will seek to have one
of its nominees elected as a director in opposition to management's  nominee for
the one vacancy available under the Bylaws currently in effect.

     Asset Value will vote:  FOR the Board  Amendment;  FOR Asset  Value's  four
nominees;  FOR the Reverse Stock Split;  FOR the ratification of Arthur Andersen
LLP as the  Company's  independent  auditors;  and  AGAINST the  Elimination  of
Stockholders Right.

     Asset Value is likely to mail this proxy statement before  management mails
its proxy  statement,  therefore,  Asset Value does not know with certainty what
other proposals may be submitted to stockholders. Therefore, Asset Value also is
seeking  express  authorization  from  stockholders to vote proxies on any other
matter  whether or not it becomes  known  prior to the Meeting  without  further
consultation with, solicitation of or disclosure to the grantor.

     The close of business on July 10, 1998 has been fixed by the Company as the
record date in determining the number of shares eligible to vote at the Meeting.
A copy of this Proxy  Statement  and Green  Proxy  Ballot  will be mailed to all
stockholders entitled to vote at the Annual Meeting.

     The approval of the Board  Amendment,  the  election of  Directors  and the
ratification of Arthur Andersen LLP require the favorable vote of a plurality of
votes  present and entitled to vote at the Meeting.  The Reverse Stock Split and
the  Elimination  of  Stockholders  Right can be effected  only by amending  the
Company's  Certificate of Incorporation  which requires an affirmative vote of a
majority of outstanding shares of Cortech Stock.

     In reliance upon Rule 14a-5(c) of the Securities and Exchange Act of 19342,
reference is made to  management's  proxy  statement for a full  description  of
management's  proposals, as well as information with respect to the record date,
the number of shares of  Cortech  Stock  eligible  to vote at the  Meeting,  the
quorum, the securities ownership of the Company, information about the Company's
officers  and  directors,   including   compensation,   information   about  the
ratification of the  appointment of Arthur Andersen LLP as independent  auditors
and the date by which  stockholders  must submit  proposals for inclusion in the
next annual meeting.
    

PLEASE READ THE FOLLOWING  MATERIAL WITH CARE BECAUSE WE BELIEVE THAT  CORTECH'S
FUTURE DEPENDS ON YOUR VOTE.

- --------
     2    Rule 14a-5(c)  provides that "any  information  contained in any other
proxy  soliciting  material which has been furnished to each person solicited in
connection with the same meeting or subject matter may be omitted from the proxy
statement,  if a clear reference is made to the particular  document  containing
such information."

                                                         

<PAGE>



                              WE URGE YOU TO VOTE:
   
                  FOR THE BOARD AMENDMENT (which will add three
                      vacancies on the Board for a total of
                                four vacancies).

             FOR ALL OF ASSET VALUE'S NOMINEES (which in combination
                with the Board Amendment would effect a change of
                            control to Asset Value).

                          FOR THE REVERSE STOCK SPLIT.

                FOR GRANTING ASSET VALUE AUTHORITY TO VOTE ON ANY
                  OTHER MATTERS WHICH COME BEFORE THE MEETING.

                 AGAINST THE ELIMINATION OF STOCKHOLDERS RIGHT.

     At the end of fiscal  1997,  Cortech  had net assets of only $15.4  million
after  losing  over $70  million  since  1993 in a  failed  attempt  to  exploit
Cortech's  technology.  The Old  Board  then  proceeded  to expend  $673,000  of
Cortech's  limited  resources  promoting  a  merger  with  BioStar,   Inc.  (the
"Merger"),  a company with a $5.6  million  negative net worth even though Asset
Value  warned  the Old  Board  from the  start  that the  Merger  was not in the
interests of  stockholders3  who,  Asset Value said,  would never approve such a
transaction. The Merger was canceled on May 7,1998.

                 Only Asset Value was willing to spend its time
                    and money to publicly oppose the Merger!
    

     Within two weeks,  Kenneth Lynn, the former CEO, left Cortech,  taking with
him, what we would call, a "departure bonus" of almost $500,000, another 3.5% of
Cortech's  remaining  cash of $14.3  million.  The  calculation  of the $500,000
departure  bonus was  derived by adding 20 months of salary  ($442,000),  future
consulting fees of an undisclosed  amount and health  insurance  coverage for 18
months  estimated at $600 per month as reported in  Cortech's  Form 8-K filed on
May 18, 1998.







- --------
     3    Asset Value has not retained an independent  financial adviser and its
conclusions  are  solely  based  on the  opinion  of its  manager,  Asset  Value
Management,  Inc. which was reached after reviewing  management's proxy material
for the Merger, including the opinion of management's financial adviser.

                                                        

<PAGE>



               We ask you. Do you want Cortech led into the future
                 by any incumbent Director or any other nominee
                             connected to the past?

                              Don't take a chance.
                               Vote for a change.
                        Vote for Asset Value's nominees!

                                  MORE RED INK!

     After the  termination  of the  Merger,  Cortech's  Form 10-Q for the first
quarter of 1998 revealed that Cortech's  losses not only continued but increased
compared to last year. In a quarter with No research and development  activities
and No revenues,  Cortech still had  approximately  15 full-time4  employees and
general  and  administrative  expenses of  $1,522,000,  of which,  according  to
Cortech, merger expense only accounted for approximately $673,000.

               The question we believe you should ask yourself, is

              ARE YOU BETTER OFF NOW THAN YOU WERE FIVE YEARS AGO?

     In what we think is the  biggest  bull  market in  history,  Cortech  Stock
prices  have  declined  from $18.25 per share in 1993 to $.50 per share in 1998,
making Cortech, by any comparison,  in our view, one of the poorest stock market
performers during this period--AND THAT'S NO BULL!





- --------
     4    Cortech  does not  disclose  whether  there are  additional  part-time
employees and consultants still hanging on.

                                                        

<PAGE>



                                  COMPARISON OF
                CORTECH'S STOCK PERFORMANCE (NASDAQ SYMBOL-CRTQ)
                                       TO
                  THE NASDAQ BIOTECHNOLOGY INDEX (IXBT) AND THE
                AMERICAN STOCK EXCHANGE BIOTECHNOLOGY INDEX (BTK)
                                

                                [GRAPH THE ABOVE]

<TABLE>
<CAPTION>

               Cortech         IXBT        BTK
               ------          -----      ------
<S>           <C>             <C>         <C>   
1993          $18.25          197.88      115.78

1994           14.25          161.40       82.06

1995            3.65625       304.30      133.77

1996            3.8125        314.48      144.56

1997            2.03125       304.89      163.28

7/17/1998        .50          335.15      144.16

</TABLE>




                              NOT A PRETTY PICTURE!


                              TOO LITTLE, TOO LATE

   
     Seven months after Asset Value first asked for representation on the Board;
long  after the Old  Board was sued for  misfeasance;  after  Cortech  had spent
$673,000 on the failed Merger; after Cortech had lost another approximately $3.4
million  from  operations  (from  September  30, 1997 through  March 31,  1998),
finally on May 11, 1998 the Old Board  expressed  an  interest  in meeting  with
Asset Value's manager, Paul Koether. By this time, Asset Value had already spent
or committed  significant amounts of its own funds (estimated to exceed $125,000
including  counsel  fees and  management  time) in  opposing  the  Merger and in
securing  control of the Board  because it believed  that a change in course for
Cortech was absolutely essential and because it believed that a Board controlled
by management would not embrace the necessary changes.  Asset Value thought that
the Old Board's offer to meet, in and of itself, was too little too late.




                                                        

<PAGE>



     Asset  Value was  willing  to meet only if the Board  would  first take the
following  steps which,  in the view of Asset Value,  would enhance  stockholder
value and stockholder democracy: 1) lift the Poison Pill put in place by the Old
Board without stockholder  approval ; 2) amend the By-laws to allow stockholders
owning  10% or  more  to  call a  special  meeting;  3)  eliminate  the  current
classification  of the Board so that all  directors  would stand for election at
the  upcoming  meeting  and 4) elect  three  Asset  Value  nominees  which would
constitute a majority of the then five person  Board.  To date the Old Board and
the Appointed Board have resisted all of these proposals.

     Supporters of classified  boards and poison pills claim that they are tools
for  directors  to  resist  takeovers  that they  deem  unfair to  stockholders.
Whatever the justification for classified boards and poison pills in general, in
the case of Cortech,  Asset Value believes that they have served only to prevent
competition  for  control.  Moreover,  in Asset  Value's  view,  the Old Board's
approval of the BioStar transaction exemplifies how these "tools" can be misused
in the hands of  directors  who have bad  judgment.  If elected,  Asset  Value's
nominees will remove the poison pill and propose to declassify  the Board at the
next Meeting.

                  MANAGEMENT'S VERSION OF STOCKHOLDER DEMOCRACY

     Management  called  this  Meeting  only after Asset Value filed to have the
Delaware  courts  compel  Cortech  to hold the  Meeting.  We ask you:  Why would
management  fail to call a  meeting  within  the time  required  by law?  Why is
management  spending  your money and our money to delay what we believe  will be
the day of  reckoning  when  the  stockholders  will  finally  be given a choice
between what, in our view, is the failed past and what we think will be a better
future.  In making  this  choice,  we ask you to  consider  that Asset Value has
promised  not to seek to merge  Cortech  with any  affiliate  or entity in which
Asset Value is an investor.  Nor will Asset Value  consider  selling its Cortech
Stock before a transaction is  consummated  which Asset Value believes is in the
interests of all  stockholders.  Asset Value intends to benefit from its Cortech
investment only to the same extent other  stockholders  benefit.  Moreover Asset
Value's nominees do not intend to take any fees for managing Cortech.


                         TIME AND MONEY ARE RUNNING OUT!

     On May 18, 1998, CEO Kenneth Lynn left Cortech. We believe that Mr Lynn was
made a scapegoat for what we think is Cortech's prior mismanagement.  But in our
opinion, Mr. Lynn was a symptom of what is wrong with Cortech not the source, at
least, in our view, not the only source.  In the past five years  (including the
first quarter of 1998),  Cortech has lost over $70 million,  and as of March 31,
1998, had cash of only $14.3 million.  We ask, does Lynn's departure absolve the
Old Board members of their  responsibility for these losses? We think the answer
is a resounding No!





<PAGE>



Will you vote for the nominees  appointed by the Old Board members who led us to
where we are today? We hope the answer is a resounding No!

                  PICTURE OF HOUR GLASS WITH CONTENTS READING


                                                               CASH REMAINING AT
                                                               MARCH 31, 1998
                                                               $14.3 million



                                                               ACCUMULATED
                                                               DEFICIT
                                                               $86 million!!!



    

                               STOP THE RED INK !

     Asset Value  considers a shutdown of Cortech an  alternative  which must be
considered,  particularly in view of the continued  losses reported in the first
quarter of 1998.  Such a course  however,  has  risks,  including  the  possible
further  diminishment  of Cortech's  technology  and the  possible  cessation of
Cortech as a going concern.  The matter would be further  evaluated with current
employees once Asset Value gained control, therefore, there is no assurance that
Cortech would be shut down.

     Asset Value can only give stockholders the assurance that its nominees will
try to further reduce Cortech's expenses and will move as quickly as possible to
secure a merger partner. Expenses that will be particularly scrutinized for cuts
are any part-time employees or consultants and employees engaged in any activity
other than care taking.  The new Board would seek to reduce,  if  possible,  any
professional  fees  unrelated  to seeking a  strategic  partner.  Asset  Value's
nominees have pledged to take no fees for serving as directors.

                          THE SHAPE OF THINGS TO COME 5
   
     So,  what else will  Asset  Value do if it obtains  control of the  Cortech
Board?  We  believe  that once the Old Board  determined  to change  control  of
Cortech,  it should have sought competitive  transactions more aggressively,  by
advertising in the financial  media,  by engaging an investment  banker from the
outset to solicit  merger  partners  and by publicly  stating that the Board was
conducting  an open  bidding  process for control of Cortech.  If elected  Asset
Value's nominees will
- --------
     5   H.G. Wells


<PAGE>



take these  steps.  Asset Value has no specific  merger  partner in mind and has
considered possible alternatives for the future of Cortech only in a preliminary
way. In the course of its own business,  however, Asset Value constantly reviews
investment  opportunities and in connection with this process has seen companies
which might be attractive  strategic  partners for Cortech  although  additional
analysis would be required to determine whether any of these companies are a fit
with Cortech.

     The  principal  standards  for seeking a candidate  would be balance  sheet
quality, positive earnings and good growth potential.  Asset Value also believes
that a private  company  which seeks a public  market or a public  company which
needs Cortech's assets to qualify for NASDAQ, would consider these attributes as
well as cash in calculating  Cortech's  value.  As of March 31, 1998,  Cortech's
total assets were $14.9  million of which cash and cash  equivalents  were $14.3
million. Asset Value is not sure, however, that there are potential acquisitions
or mergers that would be attractive for Cortech.  One thing is certain  however,
Asset Value will not seek to merge Cortech with any affiliate or entity in which
Asset Value is an investor.  Nor will Asset Value  consider  selling its Cortech
Stock before a transaction is  consummated  which Asset Value believes is in the
interests of all  stockholders.  Asset Value intends to benefit from its Cortech
investment only to the same extent other stockholders benefit.
    

   WARNING: "Those who cannot remember the past are condemned to repeat it."6

     In our  opinion,  several  individuals  and  entities,  other then  Cortech
stockholders  would have  reaped the  benefits of the Merger  with  BioStar.  We
believe  that Mr.  Lynn stood to benefit  from the Merger  because it would have
triggered his golden  parachute  ($1,300,000  for him and others with  severance
agreements) and enabled him (and other Board members and executive  officers) to
exercise 623,535 options.  BioStar's  management would have received  additional
compensation  and options in  connection  with the Merger.  In fact, it seems to
Asset Value,  that every  participant  was to profit from the Merger  except the
public stockholders of Cortech, who would have suffered a dilution in book value
per  Cortech  share of 64% (from an  historical  $.83 to a pro forma $.30) while
BioStar  stockholders  would have enjoyed an  improvement  in book value from an
historical negative ($2.86) to a positive $.17 per share.  Remember.  Only Asset
Value was willing to spend its time and money to publicly oppose the Merger!


                              PLEASE ASK YOURSELF:
   
               DO YOU WANT A BOARD COMPRISED OF ANY DIRECTORS WHO
                WERE PART OF MANAGEMENT WHILE CORTECH WAS LOSING
                                 ALL THIS MONEY?
    


- --------
     6    The Life of Reason, (1905) George Santayana

                                                   

<PAGE>



               DO YOU WANT FUTURE TRANSACTIONS SELECTED BY ANYONE
              WHO EITHER APPROVED THE MERGER OR STOOD SILENT WHILE
                            THE MERGER MOVED FORWARD?

                  WE HOPE YOUR ANSWER WILL BE : CERTAINLY NOT!
   
              PLEASE SEND THE GREEN PROXY BALLOT TO ASSET VALUE AND
              VOTE TO INCREASE THE BOARD AND TO ELECT ALL OF ASSET
                                VALUE'S NOMINEES.
    
              IF THE BOARD IS INCREASED AND ASSET VALUE'S NOMINEES
                 RECEIVE THE HIGHEST NUMBER OF VOTES CONTROL OF
                      CORTECH WILL TRANSFER TO ASSET VALUE.
   
     Remember,  Asset Value will not merge Cortech with an Asset Value affiliate
or a company in which Asset  Value is a  stockholder.  Asset  Value  believes it
should gain from any future  acquisition or Merger involving Cortech only to the
extent all  stockholders  benefit.  Nor will Asset Value sell its Cortech  Stock
before a  transaction  is  consummated  which  Asset  Value  believes  is in the
interests of all stockholders. Asset Value's nominees have pledged not to accept
any fees for serving as directors.
    

                             IT'S TIME FOR A CHANGE.
                                VOTE FOR CHANGE.
                              VOTE FOR ASSET VALUE.

   
                                   PROPOSAL 1

                    THE BOARD AMENDMENT (INCREASE THE BOARD)

     Asset Value is asking for your support to approve the Board Amendment which
will amend  Article 3 Section  3.1 of the Bylaws of Cortech to set the number of
directors  serving on the Board at seven.  The Board currently has four members.
The  affirmative  vote  of a  plurality  of  the  votes  present  in  person  or
represented by proxy and entitled to vote at the meeting are required to approve
this proposal.

     Asset Value urges you to vote FOR the approval of the Board Amendment which
will set the number of directors to serve on the Board at seven.





<PAGE>



                                   PROPOSAL 2

                              ELECTION OF DIRECTORS

     Asset Value is asking for your support to elect its  nominees.  Article II,
Section 2.2 of the Company's Bylaws,  purports to require that to bring business
before the annual meeting, a stockholder must provide timely,  written notice to
the  secretary  describing  the business  and  providing  information  about the
stockholder,   including  name  and  address  and  beneficial   ownership.   The
affirmative vote of a plurality of the votes present in person or represented by
proxy and entitled to vote at the meeting is required to elect each of the Asset
Value nominees.  Information about management's  nominees,  including beneficial
ownership of Cortech Stock and compensation  can be found in management's  proxy
statement.

     If the Board Amendment is approved four Asset Value nominees will stand for
election.  If there is only one  vacancy,  only Paul O.  Koether  will stand for
election. If a majority of shares of Cortech Stock present by proxy or in person
vote in favor of the Board Amendment,  there will be four vacancies on the Board
and the four nominees receiving the highest vote (whether Asset Value's nominees
or management's nominees) will be elected to the Board. If fewer than four Asset
Value  nominees  are  elected,  then Asset  Value's  nominees  will  withdraw in
ascending  order  starting with nominee John W.  Galuchie,  Jr. If Asset Value's
four nominees are elected,  Asset Value's nominees will constitute a majority of
the Board and control of Cortech will transfer to Asset Value.

     Except as provided above, the persons  nominated by Asset Value have agreed
to serve if elected, and Asset Value has no reason to believe that such nominees
will be unable to serve. In the event any nominee subsequently becomes unable or
unwilling to serve,  Asset Value will vote its Cortech Stock and its proxies for
a  substituted   nominee.   The  biographical  data,  including  age,  principal
occupation or employment, and other affiliations and business experience of each
Asset Value nominee during the last five years follows:
    

     Paul  O.  Koether,   age  61,  is  principally  engaged  in  the  following
businesses:  (i) as Chairman  and  director  of Kent  Financial  Services,  Inc.
("Kent")  since  July 1987 and  President  since  October  1990 and the  general
partner since 1990 of Shamrock  Associates,  an investment  partnership which is
the principal  stockholder of Kent and (ii) various positions with affiliates of
Kent,  including Chairman since 1990 and a registered  representative since 1989
of T. R. Winston & Company,  Inc. ("Winston") and since July 1992, a director of
American Metals  Service,  Inc.,  ("AMS") which was an indirect,  majority-owned
subsidiary of Kent before its Shares were  distributed  to Kent's  stockholders.
Mr. Koether also has been Chairman  since April 1988,  President from April 1989
to February  1997 and director  since March 1988 of Pure World,  Inc.,  formerly
American  Holdings,  Inc.,  ("Pure  World") and since  December  1994 has been a
director and since January 1995 has been Chairman of Pure World's majority-owned
subsidiary,  Madis Botanicals, Inc., ("Madis") a manufacturer and distributor of
natural  products.  He is also Chairman and a director of Pure World's principal
stockholder,  Sun Equities  Corporation,  ("Sun") a private company. Mr. Koether
served as Chairman and a director of NorthCorp Realty  Advisors,  Inc., an asset
management  company,  ("NorthCorp")  from June 1992 when it was acquired by Pure
World until August, 1994 when it was merged and renamed Crown NorthCorp, Inc.


<PAGE>



     Mark W. Jaindl, age 38, is the President and Chief Executive Officer of the
American Bank of the Lehigh Valley,  a commercial  bank. He has served as Senior
Vice  President  of Pure  World  from June 1992 until May 1995 and as a director
since  October  1994.  He was Senior Vice  President of Madis from December 1994
until May 1995 and a director of Madis since  December 1994 and he has served as
a director of AMS since July 1992.  Mr. Jaindl was a director of NorthCorp  from
June 1992 until  September  1994 and was Interim  President  of  NorthCorp  from
February  1994 until August 1994.  From May 1982 to October 1991 and again since
May 1995 he has  served as Chief  Financial  Officer of Jaindl  Farms,  which is
engaged in  diversified  businesses,  including  the  operation of a 12,000-acre
turkey farm, a mobile home park, a John Deere  dealership and a grain operation.
Mr. Jaindl also served as the Chief Financial Officer of Jaindl Land Company,  a
developer  of  residential,  commercial  and  industrial  properties  in eastern
Pennsylvania.

     James L.  Bicksler,  age 60,  is a  Professor  of  Economics  and  Finance,
Graduate School of Management,  Rutgers University, a position he has held since
1969.

     John  W.  Galuchie,  Jr.,  age  45,  a  certified  public  accountant,   is
principally engaged in the following businesses: (i) Winston, as President since
January 1990 and director since September 1989; (ii) Kent, in various  executive
positions since 1986 and a director from June 1989 until August 1993; (iii) Pure
World, as Executive Vice President since April 1988,  director from January 1990
until  October 1994 and for more than five years as Vice  President and director
of Sun; (iv) AMS as Vice  President,  Treasurer and a director  since July 1992.
Mr.  Galuchie  served as a director  of Crown  NorthCorp,  Inc.,  the  successor
corporation to NorthCorp from June 1992 to August 1996.

   
     Asset Value urges you to vote FOR the nominees  described above.  They will
seek to maximize  stockholder  values and pledge to cooperate  with and consider
the proposals of other stockholders.

     The nominees (whether Asset Value's or management's nominees) receiving the
highest  number of votes cast at the meeting will be elected.  Asset Value makes
no  provision  for  voting  for  management's  nominees  or any other  nominees,
therefore if you vote for fewer than all of Asset Value's nominees, you will not
have an opportunity to vote for candidates to fill vacancies on the Board.

     Even if you have voted against  increasing  the Board please vote for Asset
Value's  nominees.  The nominees  receiving the highest  number of votes will be
elected.  If the Board  Amendment  is not  approved,  Paul  Koether can still be
elected if his votes  exceed the votes for any other  nominee.  Therefore if you
agree that it is time for a change, a real change, VOTE
    
                           YES to the Board Amendment

                                       and

                           FOR Asset Value's nominees



<PAGE>


   
                                   PROPOSAL 3

                             THE REVERSE STOCK SPLIT

     Management  has proposed to reverse  stock split Cortech stock one for four
(for every four shares you presently hold, you will hold one share).  Relying on
management's  position  that the Reverse Stock Split is necessary to support the
Company's  appeal  from  NASDAQ's  delisting  of Cortech  Stock,  Asset Value is
supporting the proposal.  Management's proxy statement contains more information
about the Reverse Stock Split and why management proposes it.

     The affirmative  vote of a majority of outstanding  shares of Cortech Stock
is required to approve the Reverse Stock Split.

                                   PROPOSAL 4

                       RATIFICATION OF INDEPENDENT AUDITOR

     Management has proposed and Asset Value favors the  ratification  of Arthur
Andersen LLP as  Cortech's  independent  auditor.  More  information  about this
proposal is provided in management's  proxy statement.  A plurality of shares of
Cortech stock voting at the Meeting is required to approve this proposal.


                                   PROPOSAL 5

                     AUTHORIZATION TO VOTE ON OTHER MATTERS

     Asset Value is seeking express authority to vote on any other matters which
come  before the  Meeting.  Asset  Value is likely to mail this proxy  statement
before  management  mails its proxy statement,  therefore,  Asset Value does not
know with  certainty  what other  proposals  may be submitted  to  stockholders.
Therefore,  Asset Value also is seeking express  authorization from stockholders
to vote proxies on any other matter whether or not it becomes known prior to the
Meeting.
    

     If this  authority is granted,  it means that the proxy can be voted on any
other matter that comes before the meeting  without further  consultation  with,
solicitation of or disclosure to the grantor of the proxy.  However, even if you
grant this  authority,  remember you can always revoke any proxy at anytime even
at the meeting by following the procedures  outlined below under  "REVOCATION OF
PROXIES".





<PAGE>


   
                                   PROPOSAL 6

               OPPOSITION TO MANAGEMENT'S PROPOSED ELIMINATION OF
                    STOCKHOLDERS RIGHT TO INCREASE THE BOARD

     Currently  stockholders  can amend any  By-law by the  favorable  vote of a
plurality  of shares  of  Cortech  Stock  voting  at any  stockholders  meeting,
including setting the number of directors.  Asset Value has proposed to increase
the number of directors and to elect its nominees to the  additional  vacancies,
the  intention  and  effect  of which,  is to  override  declassification  as an
obstacle to obtaining control of the Company at the Meeting. Management proposes
to  eliminate  the right of  stockholders  to increase the Board by amending the
Certificate of Incorporation  and giving the Directors the sole right to set the
number of directors.  Asset Value opposes the Elimination of Stockholders  Right
for all the reasons set forth in this Proxy Statement in support of transferring
control  of Cortech  to Asset  Value.  Management's  basis for  submitting  this
proposal is described in management's proxy statement.  If fewer than a majority
of outstanding shares of Cortech Stock vote for management's  proposal,  it will
be defeated.

                       REQUIRED VOTE AND MANNER OF VOTING

     If more than a majority of shares of Cortech  Stock  present by proxy or in
person vote in favor of the Board Amendment, there will be four vacancies on the
Board and the four nominees  receiving  the highest vote (whether  Asset Value's
nominees or  management's  nominees) will be elected to the Board. If fewer than
four Asset Value nominees are elected, then Asset Value's nominees will withdraw
in ascending  order  starting  with nominee John W.  Galuchie,  Jr. If the Board
Amendment  is not  approved  the  nominee  (whether  Asset  Value's  nominee  or
management's  nominee) receiving the highest number of votes cast at the meeting
will be elected.

     If a plurality  of shares of Cortech  Stock  voting at the Meeting vote for
the ratification of Arthur Andersen LLP as Cortech's  independent auditor,  this
proposal will be approved. If a proxy grants express authority to vote the proxy
on any other matter that comes before the Meeting,  the proxies will be entitled
to vote on any matter without  further  consultation  with,  solicitation  of or
disclosure  to the  grantor  of the  proxy.  If a  proxy  does  not  grant  such
authority,  then the proxy can be voted on other  matters  but not on any matter
which  becomes  known a reasonable  time before the Meeting.  If the proposal to
effect the Reverse Stock Split by amending the Certificate of  Incorporation  is
approved by the favorable  vote of a majority of  outstanding  shares of Cortech
Stock it will be approved. If the proposal to eliminate a stockholder's right to
increase  the Board is not  approved  by the  favorable  vote of a  majority  of
outstanding shares of Cortech Stock, it will be defeated.

     Valid proxies will be voted as instructed therein,  but absent instructions
on the Green Proxy Ballot,  it will be voted FOR the Board Amendment;  FOR Asset
Value's  nominees;  FOR the Reverse Stock Split;  FOR the ratification of Arthur
Anderson  LLP; FOR  granting  the express  authority to vote on any other matter
which comes  before the meeting;  and AGAINST the  Elimination  of  Stockholders
Right.  Absent  the grant of express  authority  to vote the proxy on any matter
that comes before the Meeting which is presently unknown, the proxy can still be
voted on any other matter except a matter that is known a reasonable time before
the Meeting. Abstentions and broker non-votes (where a nominee holding

                                                     

<PAGE>



Shares for a beneficial  owner has not  received  voting  instructions  from the
beneficial  owner  on a  particular  matter  and the  nominee  does not vote the
Shares) will be counted in the determination of a quorum but will not be counted
for or  against  any  proposal.  We urge you to sign,  date and return the Green
Proxy Ballot in the enclosed  envelope.  No postage is required if mailed in the
United States.
    

                              SHARES IN STREET NAME
   
     If you hold your  Cortech  Stock in the name of a  brokerage  firm or bank,
your broker or banker cannot vote the Stock until the broker or banker  receives
specific  instructions  from you. Please contact the party at the brokerage firm
or bank  responsible  for your account to make sure that a proxy is executed for
your Cortech Stock on the Green Proxy Ballot.
    
                              REVOCATION OF PROXIES
   
     If  you  have  executed  any  proxy  ballot  before  receiving  this  Proxy
Statement,  you have  every  right to change  your vote by  signing,  dating and
returning the enclosed Green Proxy Ballot in the postage-paid envelope provided.
Only your latest dated proxy will count at the Meeting. Any proxy, including the
proxy  solicited  hereby,  may be revoked at any time  before it is voted by (i)
submitting a duly  executed  proxy  bearing a later date to the Secretary of the
Company or to Asset  Value,  (ii)  filing  with the  Secretary  of the Company a
written revocation or (iii) attending and voting at the Meeting in person.
    

                              SOLICITATION EXPENSE

     Asset Value,  Mark W. Jaindl and  Frederick J. Jaindl (see Schedule 1) will
bear the cost of preparing,  assembling  and mailing the enclosed form of proxy,
this proxy  statement and other  material which may be sent to  stockholders  in
connection with this solicitation. Officers and regular employees of Asset Value
or its affiliates may solicit proxies by mail, telephone,  telegraph,  facsimile
and personal  interview,  for which no additional  compensation will be paid. In
addition, Asset Value has retained Beacon Hill Partners, Inc. ("Beacon Hill") to
solicit proxies on its behalf. In connection with the solicitation in opposition
to  Cortech,  Asset  Value has  agreed to pay  Beacon  Hill up to  $15,000  plus
expenses,  part of which is a success  fee.  Asset  Value  advanced  Beacon Hill
$3,000 to cover  expenses.  It is  anticipated  that the cost to Asset  Value in
connection  with this  solicitation  (including  filings  in  opposition  to the
Merger) will be approximately $125,000.


                                            Very truly yours,


                                            Paul O. Koether
                                            Asset Value Fund Limited Partnership


<PAGE>


                                    IMPORTANT
   
     If your Shares are held in "Street  Name" only your bank or broker can vote
your Shares, and only upon receipt of your specific instructions. Please contact
the person  responsible  for your account and  instruct  them to execute a Green
Proxy Ballot as soon as possible.
    
     If you have any questions or need further assistance in voting, please call
John W. Galuchie,  Jr., of Asset Value Fund Limited Partnership collect at (908)
234-1881, or our proxy solicitor:

                           BEACON HILL PARTNERS, INC.
                                 90 BROAD STREET
                            NEW YORK, NEW YORK 10004
                                 (800) 253-3814


                                                    

<PAGE>



                                                                      SCHEDULE 1



              ADDITIONAL INFORMATION ABOUT ASSET VALUE FUND LIMITED
               PARTNERSHIP, MARK W. JAINDL AND FREDERICK J. JAINDL


     Asset  Value  Fund  Limited  Partnership  ("Asset  Value")  is  engaged  in
investing in securities.  The sole general partner of Asset Value is Asset Value
Management,  Inc.  ("Asset  Value  Management").  Asset  Value  Management  is a
wholly-owned  subsidiary  of  Kent  Financial  Services,  Inc.  ("Kent"),  whose
principal  business is the operation of T. R. Winston & Company,  Inc.  ("TRW"),
its wholly-owned  subsidiary.  TRW is a securities broker-dealer registered with
the National  Association of Securities  Dealers,  Inc. Asset Value, Asset Value
Management,  Kent and TRW maintain offices at 376 Main Street,  Bedminster,  New
Jersey 07921.

     Mark W. Jaindl ("Mark Jaindl") is the President and Chief Executive Officer
of the American Bank of the Lehigh  Valley,  a commercial  bank whose  principal
business  address is 4029 West Tilghman Street,  Allentown,  PA 18104 ("American
Bank"). (For additional  information on Mark Jaindl, see PROPOSAL 1, ELECTION OF
DIRECTORS.) Frederick J. Jaindl ("Fred Jaindl") is the sole proprietor of Jaindl
Farms (turkey  farming),  whose  principal  business  address is 3150 Coffeetown
Road,  Orefield,  PA 18069.  Fred Jaindl is Chairman of American Bank.  Mark and
Fred Jaindl are the principal  stockholders of American Bank. Mark Jaindl is the
son of Fred Jaindl.

     As of March  23,  1998,  Asset  Value  holds  2,000,000  Cortech  Shares or
approximately 10.80% of the total Cortech Shares outstanding.  Mark Jaindl holds
250,000 Cortech  Shares,  or  approximately  1.35% and Fred Jaindl holds 520,000
Cortech Shares or approximately  2.80%. Asset Value, Mark Jaindl and Fred Jaindl
disclaim the beneficial ownership of each other's Cortech Shares.  Purchases and
sales of Cortech  Shares by Asset Value,  Mark Jaindl and Fred Jaindl are listed
on Schedule 2.

     During the past ten years, none of Asset Value,  Mark Jaindl,  Fred Jaindl,
Asset Value  Management,  Kent, TRW, or the Directors and Executive  Officers of
Kent has been convicted in a criminal proceeding.



<PAGE>


<TABLE>

<CAPTION>
                            DIRECTORS AND EXECUTIVE OFFICERS
                            OF KENT FINANCIAL SERVICES, INC.

                                                                 Percent of Direct or
                                                                  Indirect Ownership
 Name and Address                 Position and Office          of Voting Securities of
of Beneficial Owner               Currently Held            Kent Financial Services, Inc.
- -------------------               -------------------       -----------------------------
<S>                               <C>                                <C>
Paul O. Koether                   Chairman, Director                 44.90%
 211 Pennbrook Road                and President
 Far Hills, NJ 07931

John W. Galuchie, Jr.             Vice President and
  376 Main Street                  Treasurer                          2.32%
 Bedminster, NJ 07921

Mark Koscinski                    Vice President                         *
  376 Main Street
  Bedminster, NJ 07921

M. Michael Witte                  Director                            1.15%
 1120 Granville Avenue
 Suite 102
 Los Angeles, CA 90049

Casey K. Tjang                    Director                               *
 56 Hall Drive
 Clark, NJ 07066

Mathew E. Hoffman                 Director                               *
 62 Rosehill Avenue
 New Rochelle, NY 10804
_________________________________________
*Less than 1 percent
 

</TABLE>

<PAGE>



                                                                      SCHEDULE 2

<TABLE>


                      PURCHASES AND SALES OF CORTECH SHARES

ASSET VALUE<F1>

Dates purchased       Number of shares purchased    Price per share<F2>    Total
- ---------------       --------------------------    ---------------      -------------
<S>                    <C>                            <C>                <C>   
07/25/97                  20,000                      $.61375            $   12,275.00
07/31/97                   6,700                       .625                   4,321.50
08/06/97                   9,100                       .6875                  6,256.25
08/07/97                   2,600                       .6875                  1,787.50
08/08/97                   3,100                       .6875                  2,131.25
08/12/97                 458,500                       .6875                315,218.75
08/15/97                   5,100                       .6875                  3,506.25
08/18/97                   5,200                       .6689                  3,478.28
08/19/97                   3,200                       .65625                 2,100.00
08/20/97                   9,000                       .65625                 5,906.25
08/21/97                   8,500                       .6875                  5,843.75
08/27/97                 146,800                       .6875                103,861.00
09/08/97                  22,000                       .6875                 15,125.00
09/11/97                  20,000                       .703125               14,062.50
09/15/97                  26,000                       .703125               18,281.25
09/16/97                   7,700                       .703125                5,414.06
09/17/97                   4,000                       .703125                2,812.50
09/24/97                  31,425                       .703125               22,095.70
09/30/97                  89,600                       .703125               63,000.00
10/01/97                  56,000                       .703125               39,375.00
10/02/97                   1,475                       .703125                1,037.11
10/06/97                  25,000                       .6875                 17,187.50
10/07/97                   2,000                       .6875                  1,375.00
10/07/97                   6,500                       .71875                 4,671.88
10/07/97                 336,000                       .703125              236,250.00
10/08/97               1,556,757                       .65                1,011,892.05
10/08/97                   5,000                       .75                    3,750.00
10/08/97                  20,000                       .71875                14,375.00
10/09/97                   2,000                       .71875                 1,437.50
10/09/97                   5,000                       .765625                3,828.13
10/09/97                  18,500                       .75                   13,875.00
10/10/97                   4,500                       .78125                 3,515.63
10/14/97                   1,000                       .78125                   781.25
10/14/97                   6,000                       .8125                  4,875.00
10/28/97                  15,000                       .6875                 10,312.50
10/30/97                  13,000                       .6875                  8,937.50
10/30/97                  12,000                       .65625                 7,875.00
11/03/97                   3,700                       .6875                  2,543.75
11/04/97                   4,900                       .65625                 3,215.63
11/05/97                  12,000                       .6875                  8,250.00
11/05/97                   2,500                       .65625                 1,640.63
11/07/97                  11,300                       .65625                 7,415.63
11/10/97                  58,343                       .65625                38,287.59
11/11/97                  10,500                       .65625                 6,890.63

                                                         (table continued on next page)

<PAGE>



(table continued from previous page)


Dates purchased       Number of shares purchased    Price per share<F2>    Total
- ---------------       --------------------------    ---------------      -------------
11/14/97                   4,000                       .65625                 2,625.00
11/14/97                   8,500                       .6875                  5,843.75
11/17/97                   9,700                       .65625                 6,365.63
11/18/97                  11,300                       .65625                 7,415.63
11/24/97                   5,000                       .640625                3,203.13
                       ---------                                         -------------
                       3,106,000                                         $2,086,524.84
                       ---------                                         -------------

Dates sold            Number of shares sold         Price per share<F2>    Total
- ----------            -------------------------     ---------------      -------------
08/13/97                   3,000                      $.6875             $    2,062.43
08/29/97                   3,000                       .71875                 2,156.17
09/17/97                   2,000                       .71875                 1,437.45
09/30/97                   3,000                       .71875                 2,156.17
10/07/97                 325,000                       .65                  211,242.95
02/10/98                 770,000                       .6705                516,285.00
                       ---------                                         -------------
                       1,106,000                                            735,340.17<F3>
                       ---------                                         -------------
                       2,000,000                                         $1,319,425.00
                       =========                                         =============


MARK W. JAINDL

Dates purchased       Number of shares purchased    Price per share<F2>    Total
- ---------------       --------------------------    ---------------      -------------
02/10/98                 250,000                       .6705             $  167,625.00
                      ==========                                         =============



FREDERICK J. JAINDL

Dates purchased       Number of shares purchased    Price per share<F2>    Total
- ---------------       --------------------------    ---------------      -------------
02/10/98                 520,000                       .6705             $  348,660.00
                      ==========                                         =============



<FN>
<F1>     Excludes the purchase for an aggregate  amount of $11,251.52 on October
         8, 1997 of warrants to purchase 562,576 shares of Cortech stock,  which
         were contributed back to the capital of Cortech on October 18, 1997.
         No shares were purchased with or are being held with borrowed funds.

<F2>     Price excludes brokerage commissions, if any.

<F3>     Reflects loss on sale of $31,759.67.
</FN>
</TABLE>
                                                            
<PAGE>

REVISED PRELIMINARY OPPOSITION PROXY CARD

                                 Cortech, Inc.
                 Annual Meeting To Be Held On September 4, 1998
          This Proxy Is Being Solicited On Behalf Of Asset Value Fund
                      Limited Partnership ("Asset Value")

     The undersigned hereby appoints Paul O. Koether, Mark W. Jaindl and John W.
Galuchie, Jr. or any of them, the undersigned's proxies, each with full power of
substitution,  to vote  all  Shares  of  Common  Stock  of  Cortech,  Inc.  (the
"Company") which the undersigned would be entitled to vote if personally present
at the Annual Meeting of  Stockholders of the Company to be held on September 4,
1998 at 9:00 a.m.  local time at the  Renaissance  Hotel,  3801  Quebec  Street,
Denver,  Colorado  (the  "Meeting")  and at any  adjournments  or  postponements
thereof and, without limiting the generality of the power hereby conferred,  the
proxy nominees named above and each of them are specifically directed to vote as
indicated below.

   
     WHERE A CHOICE IS INDICATED,  THE SHARES  REPRESENTED BY THIS PROXY WILL BE
VOTED AS SPECIFIED.  IF NO CHOICE IS INDICATED,  THE SHARES  REPRESENTED BY THIS
PROXY WILL BE VOTED FOR PROPOSALS 1, 2, 3, 4 AND 5 (GRANTING  EXPRESS  AUTHORITY
TO VOTE ON ANY MATTER) AND AGAINST PROPOSAL 6.
    

     Even if express  authority to vote on any other  matters is withheld,  this
proxy confers  discretionary  authority on the proxy  nominees  named herein and
each of them to vote on such  amendments,  variations or other  business  except
those matters which become known a reasonable time before the Meeting.

   
ASSET VALUE  RECOMMENDS A VOTE FOR  INCREASING THE NUMBER OF DIRECTORS FROM FOUR
TO SEVEN.
    

1. To amend Article 3 Section 3.1 of the  Company's  Bylaws to set the number of
directors to serve on the Board of Directors at seven.

______FOR                     ______AGAINST                      ______ABSTAIN


ASSET VALUE RECOMMENDS A VOTE FOR THE ASSET VALUE NOMINEES.

   
2. To elect Asset Value's nominees,  Paul O. Koether,  Mark W. Jaindl,  James L.
Bicksler and John W. Galuchie, Jr.
    

______FOR all nominees (except as marked to the contrary).

______WITHHELD authority to vote for all nominees.

For, except vote withheld from the following nominee(s):

- --------------------------------------------------------------------------------

   

ASSET VALUE RECOMMENDS A VOTE FOR THE REVERSE STOCK SPLIT.

3. To approve an amendment to the  Company's  Certificate  of  Incorporation  to
provide for a one for four reverse stock split.

______FOR                     ______AGAINST                      ______ABSTAIN

    

<PAGE>


ASSET VALUE RECOMMENDS A VOTE FOR THE RATIFICATION OF ARTHUR ANDERSEN LLP.


4. To ratify the appointment of Arthur Andersen LLP as independent  auditors for
the year ended December 31, 1998.

______FOR                     ______AGAINST                      ______ABSTAIN

            
ASSET VALUE  RECOMMENDS  A VOTE FOR GRANTING  EXPRESS  AUTHORIZATION  TO VOTE ON
SUCH OTHER MATTERS AS MAY PROPERLY COME BEFORE THE MEETING OR ANY  POSTPONEMENTS
OR  ADJOURNMENTS  OF THE MEETING  WITHOUT  FURTHER  DISCLOSURE,  CONSULTATION OR
SOLICITATION.
    

5. To grant express authority to vote on any matter subsequently proposed before
or at the Meeting.

______GRANTED                 ______WITHHELD                     ______ABSTAIN

   
ASSET VALUE  RECOMMENDS A VOTE  AGAINST THE  PROPOSAL TO ELIMINATE  STOCKHOLDERS
RIGHT TO INCREASE THE NUMBER OF DIRECTORS.

6. To amend Article IX , Section 1 of the Company's Certificate of Incorporation
to provide that the number of directors shall be set by the Board of Directors.

______FOR                     ______AGAINST                      ______ABSTAIN
   
           
     The undersigned  acknowledges  receipt of the accompanying Notice of Annual
Meeting of Stockholders and Proxy Statement for the September 4, 1998 meeting.

                                                             
                                      Dated:______________________________, 1998


- ------------------------------------------
                                      Signature of Stockholder


- ------------------------------------------
                                      Signature of Stockholder if Shares held in
                                      more than one name (Please sign exactly as
                                      name or names appear hereon. Full title of
                                      one  signing  in  representative  capacity
                                      should   be   clearly   designated   after
                                      signature.  If a corporation,  please sign
                                      in full corporate  name  by  President  or
                                      other   authorized   officer(s).     If  a
                                      partnership,  please  sign  in partnership
                                      name by authorized person.  If stock is in
                                      the name of  two  or  more  persons,  each
                                      should  sign.  Joint  owners  should  each
                                      sign.  Names of all joint holders should
                                      be written even if signed by only one.)
   
PLEASE  PROMPTLY  COMPLETE,  DATE,  SIGN AND  MAIL  THIS  PROXY IN THE  ENCLOSED
POSTAGE-PAID ENVELOPE.
    





REVISED PRELIMINARY OPPOSITION PROXY MATERIAL

                      ASSET VALUE FUND LIMITED PARTNERSHIP
                          376 MAIN STREET, P.O. BOX 74
                              BEDMINSTER, NJ 07921
                                 (908) 234-1881



                                                                    July__, 1998

Dear Fellow Cortech Stockholder:
   
     We and two other  investors  ("Asset Value") own  approximately  15% of the
outstanding shares ("Cortech Shares") of Cortech, Inc. ("Cortech"),  which makes
us by far Cortech's  largest  stockholders.  We believe  Asset Value's  nominees
would  provide  better  leadership  for  Cortech  and that is why we are seeking
control of the Board by electing our nominees to the Board.1

     Effective  July 21, 1998,  three members of the old Board (the "Old Board")
resigned after appointing their  replacements (the "Appointed  Board").  Cortech
has stated  that the  departures  did not  result  from  disagreements  with the
Company.  There has been no explanation of why the incumbents did not wait until
their successors were chosen by the stockholders on September 4 which would have
permitted stockholders an opportunity to elect the new Directors.

   WARNING: "Those who cannot remember the past are condemned to repeat it."2

     At the end of fiscal  1997,  Cortech  had net assets of only $15.4  million
after  losing  over $70  million  since  1993 in a  failed  attempt  to  exploit
Cortech's  technology.  The Old  Board  then  proceeded  to expend  $673,000  of
Cortech's  limited  resources  promoting  a  merger  with  BioStar,   Inc.  (the
"Merger"),  a company with a $5.6  million  negative net worth even though Asset
Value  warned  the Old  Board  from the  start  that the  Merger  was not in the
interests of stockholders3 who, Asset
- --------
     1    Asset Value is also asking stockholders to approve an amendment to the
By-laws which would increase the number of directors from four to seven creating
a total of four vacancies (the "Board  Amendment").  If these four vacancies are
filled with Asset  Value's  nominees,  control of Cortech will transfer to Asset
Value.  If the Board is not  increased,  Asset Value will seek to elect  nominee
Paul  Koether,  to fill the vacancy  which would then be  available.  Management
opposes the Board  Amendment and instead  proposes to amend the  Certificate  of
Incorporation so that only directors have a right to set the number of directors
(the "Elimination of Stockholders Right").  Asset value opposes the Elimination
of Stockholders Right.

     2    The Life of Reason, (1905) George Santayana

     3    Asset Value has not retained an independent  financial adviser and its
conclusions  are  solely  based  on the  opinion  of its  manager,  Asset  Value
Management,  Inc. which was reached after reviewing  management's proxy material
for the Merger, including the opinion of management's financial adviser.


<PAGE>



Value said, would never approve such a transaction.  The Merger was canceled  on
May 7, 1998.

          ONLY ASSET VALUE WAS WILLING TO SPEND ITS TIME AND MONEY TO
                          PUBLICLY OPPOSE THE MERGER!
    

We ask you. Do you want Cortech led into the future by any incumbent Director or
                   any other nominee connected to this past?

                              Don't take a chance.
                               Vote for a change.
                        Vote for Asset Value's nominees!

                                 MORE RED INK !

     After the  termination  of the  Merger,  Cortech's  Form 10-Q for the first
quarter of 1998 revealed that Cortech's  losses not only continued but increased
compared to last year. In a quarter with No research and development  activities
and No revenues,  Cortech still had  approximately  15 full-time4  employees and
general  and  administrative  expenses of  $1,522,000,  of which,  according  to
Cortech,  merger expense only accounted for  approximately  $673,000.  After the
Form10-Q was filed Kenneth Lynn, the former CEO, left Cortech,  taking with him,
what we would call,  a  "departure  bonus" of almost  $500,000,  another 3.5% of
Cortech's  remaining  cash of $14.3  million.  The  calculation  of the $500,000
departure  bonus was  derived by adding 20 months of salary  ($442,000),  future
consulting fees of an undisclosed  amount and health  insurance  coverage for 18
months estimated at $600 per month as reported in Cortech's Form 8-K filed on
May 18, 1998.

   
                         What did the Old Board do next?

     Well one thing it did not do -at least not voluntarily- is call this Annual
Meeting within the 13 months  required by Delaware law.  Instead Asset Value had
to file a  lawsuit  to  compel  the Board to let  stockholders  decide  who will
determine  Cortech's  future.  THIS MEETING WAS ORDERED BY THE CHANCERY COURT OF
DELAWARE ONLY AFTER A LAWSUIT WAS FILED BY ASSET VALUE TO COMPEL A MEETING.
    
- --------
     4    Cortech  does not  disclose  whether  there are  additional  part-time
employees and consultants  still hanging on. Asset Value considers a shutdown of
Cortech an  alternative  which must be considered,  particularly  in view of the
continued  losses  reported in the first quarter of 1998. Such a course however,
has risks,  including the possible further  diminishment of Cortech's technology
and the possible  cessation of Cortech as a going  concern.  The matter would be
further  evaluated  with  current  employees  once Asset Value  gained  control,
therefore, there is no assurance that Cortech would be shut down.



<PAGE>


   
     Ask yourself why would the Old Board spend Cortech's  limited  resources to
defend  against a demand to hold an annual  meeting as required by law?  And why
would the  Appointed  Board  spend  Cortech's  limited  resources  on this proxy
contest?

     We think one  reason is  because  management  does not want you to ask this
question:
    

                 ARE YOU BETTER OFF NOW THAN YOU WERE FIVE YEARS
                                      AGO?

     In what we think is the  biggest  bull  market in  history,  Cortech  Stock
prices  have  declined  from $18.25 per share in 1993 to $.50 per share in 1998,
making Cortech, by any comparison,  in our view, one of the poorest stock market
performers during this period. --AND THAT'S NO BULL!

                                  COMPARISON OF
                CORTECH'S STOCK PERFORMANCE (NASDAQ SYMBOL-CRTQ)
                                       TO
                      THE NASDAQ BIOTECHNOLOGY INDEX (IXBT)
                                     AND THE
                AMERICAN STOCK EXCHANGE BIOTECHNOLOGY INDEX (BTK)


                               [GRAPH THE ABOVE]

<TABLE>
<CAPTION>

               Cortech         IXBT        BTK
               ------          -----      ------
<S>           <C>             <C>         <C>   
1993          $18.25          197.88      115.78

1994           14.25          161.40       82.06

1995            3.65625       304.30      133.77

1996            3.8125        314.48      144.56

1997            2.03125       304.89      163.28

7/17/1998        .50          335.15      144.16

</TABLE>



                              NOT A PRETTY PICTURE!




<PAGE>



                              TOO LITTLE, TOO LATE
   
     Seven  months after Asset Value first asked for  representation  on the Old
Board;  long after the Board was sued for  misfeasance;  after Cortech had spent
$673,000 on the failed Merger; after Cortech had lost another approximately $3.4
million  from  operations  (from  September  30, 1997 through  March 31,  1998),
finally on May 11, 1998 the Cortech Board  expressed an interest in meeting with
Asset Value's manager, Paul Koether. By this time, Asset Value had already spent
or committed  significant amounts of its own funds (estimated to exceed $125,000
including  counsel  fees and  management  time) in  opposing  the  Merger and in
securing  control of the Board  because it believed  that a change in course for
Cortech was absolutely essential and because it believed that a Board controlled
by management would not embrace the necessary changes.  Asset Value thought that
the Old Board's offer to meet, in and of itself, was too little too late.
    

                  MANAGEMENT'S VERSION OF STOCKHOLDER DEMOCRACY
   
     Management  called  this  Meeting  only after Asset Value filed to have the
Delaware  courts  compel  Cortech  to hold the  Meeting.  We ask you:  Why would
management  fail to call a  meeting  within  the time  required  by law?  Why is
management  spending  your money and our money to delay what we believe  will be
the day of  reckoning  when  the  stockholders  will  finally  be given a choice
between what in our view,  is the failed past and what we think will be a better
future.  In making  this  choice,  we ask you to  consider  that Asset Value has
promised  not to seek to merge  Cortech  with any  affiliate  or entity in which
Asset Value is an investor.  Nor will Asset Value  consider  selling its Cortech
Stock before a transaction is  consummated  which Asset Value believes is in the
interests of all  stockholders.  Asset Value intends to benefit from its Cortech
investment only to the same extent other  stockholders  benefit.  Moreover Asset
Value's nominees do not intend to take any fees for managing Cortech.
    

                         TIME AND MONEY ARE RUNNING OUT!
   
     On May 18, 1998, CEO Kenneth Lynn left Cortech. We believe that Mr Lynn was
made a scapegoat for what we think is Cortech's prior mismanagement.  But in our
opinion, Mr. Lynn was a symptom of what is wrong with Cortech not the source, at
least, in our view, not the only source.  In the past five years  (including the
first quarter of 1998),  Cortech has lost over $70 million,  and as of March 31,
1998, had cash of only $14.3 million.  We ask, does Lynn's departure absolve the
Old Board members of their  responsibility for these losses? We think the answer
is a resounding No!





<PAGE>



Will you vote for the nominees appointed by the Old Board members who led us to
           where we are today? We hope the answer is a resounding No!



                  PICTURE OF HOUR GLASS WITH CONTENTS READING

                                                               CASH REMAINING AT
                                                               MARCH 31, 1998
                                                               $14.3 million





                                                               ACCUMULATED
                                                               DEFICIT
                                                               $86 million!!!

    



                          THE SHAPE OF THINGS TO COME 5

     So, what will Asset Value do if it obtains control of the Cortech Board? We
believe that once the Cortech Board determined to change control of Cortech,  it
should have sought competitive transactions more aggressively, by advertising in
the financial media, by engaging an investment banker from the outset to solicit
merger  partners and by publicly  stating that the Board was  conducting an open
bidding process for control of Cortech.  If elected Asset Value's  nominees will
take these  steps.  Asset Value has no specific  merger  partner in mind and has
considered possible alternatives for the future of Cortech only in a preliminary
way. In the course of its own business,  however, Asset Value constantly reviews
investment  opportunities and in connection with this process has seen companies
which might be attractive  strategic  partners for Cortech  although  additional
analysis would be required to determine whether any of these companies are a fit
with Cortech.


- --------
     5     H.G. Wells


<PAGE>


   
     The  principal  standards  for seeking a candidate  would be balance  sheet
quality, positive earnings and good growth potential.  Asset Value also believes
that a private  company  which seeks a public  market or a public  company which
needs Cortech's assets to qualify for NASDAQ, would consider these attributes as
well as cash in calculating  Cortech's  value.  As of March 31, 1998,  Cortech's
total assets were $14.9  million of which cash and cash  equivalents  were $14.3
million. Asset Value is not sure, however, that there are potential acquisitions
or mergers that would be attractive for Cortech.  One thing is certain  however,
Asset Value will not seek to merge Cortech with any affiliate or entity in which
Asset Value is an investor.  Nor will Asset Value  consider  selling its Cortech
Stock before a transaction is  consummated  which Asset Value believes is in the
interests of all  stockholders.  Asset Value intends to benefit from its Cortech
investment only to the same extent other stockholders benefit.
    

     Now it is time  for the  Annual  Meeting;  time  for  the  stockholders  to
re-evaluate  the past  leadership  of Cortech and time to consider a change.  We
believe that Asset Value has the same interests as all other  stockholders which
it believes will be a change from this management - a substantial change.

                              PLEASE ASK YOURSELF:
   
               DO YOU WANT A BOARD COMPRISED OF ANY DIRECTORS WHO
                WERE PART OF MANAGEMENT WHILE CORTECH WAS LOSING
                                 ALL THIS MONEY?
    
               DO YOU WANT FUTURE TRANSACTIONS SELECTED BY ANYONE
              WHO EITHER APPROVED THE MERGER OR STOOD SILENT WHILE
                            THE MERGER MOVED FORWARD?

                  WE HOPE YOUR ANSWER WILL BE : CERTAINLY NOT!
   
              PLEASE SEND THE GREEN PROXY BALLOT TO ASSET VALUE AND
              VOTE TO INCREASE THE BOARD AND TO ELECT ASSET VALUE'S
                                    NOMINEES.
    
                    IT'S TIME FOR A CHANGE; VOTE FOR CHANGE;
                              VOTE FOR ASSET VALUE.
   
                       SEND IN THE GREEN PROXY BALLOT VOTE
                   YES TO INCREASE THE BOARD BUT IN ANY EVENT:
    




<PAGE>


                     VOTE FOR ALL OF ASSET VALUE'S NOMINEES!
   
              VOTE AGAINST THE ELIMINATION OF A STOCKHOLDERS RIGHT!
    

                                            Very truly yours,



                                            Paul O. Koether
                                            Asset Value Fund Limited Partnership




                                    IMPORTANT
   
     If your shares are held in "Street  Name" only your bank or broker can vote
your shares, and only upon receipt of your specific instructions. Please contact
the person  responsible  for your account and  instruct  them to execute a Green
Proxy Ballot as soon as possible.
    

     If you have any questions or need further assistance in voting, please call
John W. Galuchie,  Jr., of Asset Value Fund Limited Partnership collect at (908)
234-1881, or our proxy solicitor:

                           BEACON HILL PARTNERS, INC.
                                 90 BROAD STREET
                            NEW YORK, NEW YORK 10004
                                 (800) 253-3814



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