US5878981A (Expired)
2002-09-06
PAYMENT
Year of Fee Payment 4
2006-09-27
MAINTENANCE FEE REMINDER MAILED
2007-03-09
FOR FAILURE TO PAY MAINTENANCE FEES
2007-04-11
ON STATUS: PATENT DISCONTINUATION
Free Format Text PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
2007-05-08
-EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE
Effective DATE 20070309
