Granted Patent
Utility
US 5,830,964 · App. 08/993,908
Vinyl pyrrolidone polymers substantially free of vinyl lactam monomers
Inventors:
Kou-Chang Liu, Lowell R. Anderson, Rajiv Ginde, Colleen M. Rocafort
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Dec 18, 1997
Inventors
Kou-Chang Liu
Lowell R. Anderson
Rajiv Ginde
Colleen M. Rocafort
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.