US6164591A (Expired)
2004-07-14
MAINTENANCE FEE REMINDER MAILED
2004-12-24
PAYMENT
Year of Fee Payment 4
2004-12-24
FOR LATE PAYMENT
2008-07-07
MAINTENANCE FEE REMINDER MAILED
2008-12-26
FOR FAILURE TO PAY MAINTENANCE FEES
2009-01-26
ON STATUS: PATENT DISCONTINUATION
Free Format Text PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
2009-02-17
-EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE
Effective DATE 20081226