Granted Patent
Utility
US 5,082,913 · App. 07/557,354
Terpolymers of maleic anhydride, alkyl vinyl ethers and isobutylene and crosslinked products thereof
Inventors:
Mohammed Tazi, Robert B. Login, Yoon Tae Kwak
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: Jul 25, 1990
Inventors
Mohammed Tazi
Robert B. Login
Yoon Tae Kwak
Assignee (at issue)
ISP INVESTMENTS LLC
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.