Granted Patent
Utility
US 5,609,865 · App. 08/365,258
Substantially homogeneous copolymers of vinyl pyrrolidone and N-3,3-dimethylaminopropyl methacrylamide for personal care applications
Inventors:
Kou-Chang Liu, Lowell R. Anderson, Eugene Hardy, Yakir Reuven
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Dec 28, 1994
Inventors
Kou-Chang Liu
Lowell R. Anderson
Eugene Hardy
Yakir Reuven
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.