Granted Patent
Utility
US 5,286,826 · App. 08/026,649
Process for making highly crosslinked polyvinylpyrrolidone having a low swell volume
Inventors:
Jenn S. Shih, Susan Y. Tseng
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Mar 5, 1993
Inventors
Jenn S. Shih
Susan Y. Tseng
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.