NOTIFICATION OF ACCEPTANCE OF DELAYED PAYMENT OF MAINTENANCE FEE
                        (35 U.S.C. 41(c); 37 CFR 1.378)

   The patent(s) listed below are considered as not having expired but are
subject to the conditions set forth in 35 U.S.C. 41(c)(2), in view of the
Petition to Accept Late Payment of the maintenance fees which has been GRANTED
BY THE COMMISSIONER OF PATENTS AND TRADEMARKS, as provided for under 35 U.S.C.
41(c)(1) and 37 CFR 1.378.

                                                Application     Delayed Payment
Patent No.       Serial No.     Patent Date     Filing Date     Acceptance Date

4,359,033        06/224,423        11/16/82        01/12/81        01/26/95
4,512,216        06/572,289        04/23/85        01/20/84        01/25/95
4,520,520        06/462,909        06/04/85        02/01/83        12/06/94
4,562,697        06/679,918        01/07/86        12/10/84        01/27/95
4,606,396        06/574,938        08/19/86        01/27/84        11/23/94
4,608,904        06/735,723        09/02/86        05/20/85        01/24/95
4,881,516        07/194,221        11/21/89        05/16/88        06/03/94
4,886,039        07/046,753        12/12/89        05/07/87        06/30/94
4,918,368        07/162,219        04/17/90        02/29/88        06/13/94
4,920,995        07/233,374        05/01/90        08/18/88        07/20/94
4,922,623        07/135,664        05/08/90        12/21/87        01/30/95
4,927,750        07/049,863        05/22/90        03/25/87        01/24/95
4,966,168        07/387,419        10/23/90        07/31/89        01/24/95