Granted Patent
Utility
US 4,980,419 · App. 07/374,701
Alkyl vinyl ether polymers containing a lactam functionality
Inventor:
Ratan K. Chaudhuri
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Jul 3, 1989
Inventor
Ratan K. Chaudhuri
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.