Granted Patent
Utility
US 5,073,614 · App. 07/599,592
Strongly swellable, moderately crosslinked polyvinylpyrrolidone
Inventors:
Jenn S. Shih, Terry E. Smith, Jui-Chang Chuang
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Oct 18, 1990
Inventors
Jenn S. Shih
Terry E. Smith
Jui-Chang Chuang
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.