Granted Patent
Utility
US 5,147,946 · App. 07/667,140
Vinyl ether siloxane copolymeric composition
Inventor:
Kou-Chang Liu
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Mar 11, 1991
Inventor
Kou-Chang Liu
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.