INPADOC Patent Family US4818990
Publication No. Publication date Filing No. Priority Status
US4818990A 1989-04-04 US9515287A CA594383A 19890321
US9515287A 19870911		 Expired
CA1328009C 1994-03-22 CA594383A CA594383A 19890321
US9515287A 19870911		 Expired

INPADOC Legal Status
US4818990A (Expired)
1992-11-03
MAINTENANCE FEE REMINDER MAILED
 
1993-04-02
PAYMENT
Year of Fee Payment 4
 
1993-04-02
FOR LATE PAYMENT
 
1996-05-06
PAYMENT
Year of Fee Payment 8
 
2000-10-24
MAINTENANCE FEE REMINDER MAILED
 
2001-04-01
FOR FAILURE TO PAY MAINTENANCE FEES
 
2001-06-05
-EXPIRED DUE TO FAILURE TO PAY MAINTENANCE FEE
Effective DATE 20010404
 
2018-01-30
ON STATUS: PATENT DISCONTINUATION
Free Format Text PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362
 
CA1328009C (Expired)
2011-03-22

 


Updated on July 22, 2019