Granted Patent
Utility
US 4,900,809 · App. 07/322,453
Process of rendering copolymers of maleic anhydride and alkyl vinyl ethers prepared in benzene solvent substantially benzene-free
Inventors:
Mohammed Tazi, Robert B. Login, Nikhil Kundel
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Mar 13, 1989
Inventors
Mohammed Tazi
Robert B. Login
Nikhil Kundel
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.