Granted Patent
Utility
US 5,219,906 · App. 07/862,147
Low boiling solubilizer for vinyl pyrrolidone/acrylic acid copolymers
Inventors:
Jenn S. Shih, Terry E. Smith
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Apr 2, 1992
Inventors
Jenn S. Shih
Terry E. Smith
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.