IP Library › Granted Patent US 6,669,826
Granted Patent Utility
US 6,669,826 · Confirmation No. 9869

COMPACT PROTON EXCHANGE MEMBRANE (PEM) ELECTROCHEMICAL CELL STACK

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2020-11-16 SES.LOSS.ELC Notification of loss of entitlement to small entity status via Patent Application Information Retrieval (PAIR) 1 View
2020-11-13 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2020-11-13 N570 Communication - Re: Power of Attorney (PTOL-308) 1 View
2020-10-29 PA.. Power of Attorney 2 View
2020-10-29 N417 Electronic Filing System Acknowledgment Receipt 2 View
2020-10-29 R3.73 Assignee showing of ownership per 37 CFR 3.73 3 View
2003-11-06 LET. Miscellaneous Incoming Letter 1 View
2003-11-06 DRW Drawings-only black and white line drawings 6 View
2003-11-06 IFEE Issue Fee Payment (PTO-85B) 2 View
2002-04-11 TRNA Transmittal of New Application 3 View
2002-04-11 SPEC Specification 18 View
2002-04-11 CLM Claims 6 View
2002-04-11 ABST Abstract 1 View
2002-04-11 DRW Drawings-only black and white line drawings 7 View
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Quick Facts
Patent No.
US 6,669,826
App. No.
10/120,888
Filed
2002-04-11
Granted
2003-12-30
Art Unit
1742
PTA
0 days