Granted Patent
Utility
US 5,034,487 · App. 07/565,002
Process for making copolymers of maleic anhydride and a C.sub.1 -C.sub.4 alkyl vinyl ether having a high specific viscosity
Inventors:
Mohammed Tazi, John J. Ardan
Patented Case
View Patent ↗
Granted: Jul 23, 1991
Filed: Aug 9, 1990
Inventors
Mohammed Tazi
John J. Ardan
Assignee (at issue)
GAF Chemicals Corporation
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.