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

4,371,529        06/318,906        02/01/83        11/06/81        03/30/95
4,525,889        06/610,778        07/02/85        05/16/84        03/30/95
4,571,554        06/543,923        02/18/86        10/20/83        03/30/95
4,574,047        06/638,126        03/04/86        08/06/84        03/29/95
4,589,372        06/707,523        05/20/86        03/04/85        03/30/95
4,603,851        06/757,299        08/05/86        07/22/85        03/29/95
4,611,500        06/682,313        09/16/86        12/17/84        03/30/95
4,615,209        06/688,518        10/07/86        01/03/85        03/29/95
4,617,557        06/669,815        10/14/86        11/08/84        03/31/95
4,621,074        06/792,264        11/04/86        10/28/85        03/31/95
4,622,558        06/795,721        11/11/86        11/07/85        03/28/95
4,623,230        06/799,190        11/18/86        11/18/85        03/15/95
4,632,122        06/726,729        12/30/86        04/24/85        03/29/95
4,638,904        06/749,401        01/27/87        06/27/85        03/30/95
4,800,947        07/099,056        01/31/89        09/21/87        03/27/95
4,803,771        07/141,711        02/14/89        01/07/88        03/29/95
4,805,624        07/037,976        02/21/89        04/14/87        03/29/95
4,810,274        07/002,124        03/07/89        01/12/87        03/29/95
4,834,121        07/075,735        05/30/89        07/20/87        03/15/95
4,858,248        07/152,758        08/22/89        02/05/88        03/31/95
4,862,582        07/156,218        09/05/89        02/16/88        03/15/95
4,881,401        07/162,972        11/21/89        03/02/88        03/06/95
4,890,913        07/113,244        01/02/90        10/26/87        03/29/95
4,900,029        07/324,466        02/13/90        03/16/89        03/31/95
4,932,663        07/371,062        06/12/90        06/26/89        03/24/95
4,965,544        07/459,896        10/23/90        01/02/90        03/29/95
4,967,304        07/256,357        10/30/90        10/11/88        03/27/95
4,977,845        07/393,280        12/18/90        08/14/89        03/29/95
4,981,416        07/450,571        01/01/91        12/14/89        03/27/95
4,982,545        07/378,280        01/08/91        07/10/89        03/29/95
4,990,850        07/074,901        02/05/91        07/17/87        03/28/95