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

4,478,981        06/360,525        10/23/84        03/22/82        12/06/94
4,500,989        06/404,039        02/19/85        08/02/82        11/28/94
4,524,437        06/536,867        06/18/85        09/29/83        11/23/94
4,538,833        06/559,487        09/03/85        12/08/83        11/30/94
4,552,713        06/582,054        11/12/85        02/21/84        11/21/94
4,556,002        06/489,117        12/03/85        04/27/83        12/06/94
4,573,683        06/677,094        03/04/86        11/30/84        11/28/94
4,592,281        06/402,913        06/03/86        07/29/82        12/05/94
4,599,520        06/575,612        07/08/86        01/31/84        12/05/94
4,605,870        06/478,613        08/12/86        03/25/83        12/05/94
4,776,583        06/591,817        10/11/88        03/21/84        12/05/94
4,778,193        07/001,052        10/18/88        01/07/87        11/28/94
4,782,327        06/688,444        11/01/88        01/02/85        11/29/94
4,795,652        06/941,448        01/03/89        12/15/86        11/28/94
4,815,263        07/197,025        03/28/89        05/20/88        12/06/94
4,839,656        06/641,385        06/13/89        08/16/84        11/29/94
4,892,308        07/258,636        01/09/90        10/17/88        11/28/94
4,934,931        07/329,268        06/19/90        03/27/89        11/28/94
4,935,219        07/133,448        06/19/90        12/15/87        11/28/94
4,935,728        07/122,951        06/19/90        11/20/87        11/29/94
4,936,333        07/306,160        06/26/90        02/06/89        11/30/94
4,937,552        07/169,306        06/26/90        03/17/88        12/06/94
4,941,501        07/306,392        07/17/90        02/06/89        11/28/94
4,945,696        07/337,883        08/07/90        04/14/89        11/28/94
4,949,255        07/241,415        08/14/90        09/07/88        12/06/94
4,949,650        07/388,065        08/21/90        07/31/89        11/30/94
4,955,503        07/305,079        09/11/90        02/02/89        11/28/94
4,957,153        07/346,627        09/18/90        05/02/89        11/15/94