Granted Patent
Utility
US 4,923,694 · App. 07/236,395
Hydrolysis resistant vinyl lactam amino acrylamide polymers
Inventors:
Jenn S. Shih, Terry E. Smith
Patented Case
View Patent ↗
Granted: May 8, 1990
Filed: Aug 25, 1988
Inventors
Jenn S. Shih
Terry E. Smith
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.