Granted Patent
Utility
US 5,874,510 · App. 08/932,996
Process for making crosslinked copolymers of maleic anhydride and methyl vinyl ether
Inventors:
Yoon Tae Kwak, Stephen L. Kopolow
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Sep 18, 1997
Inventors
Yoon Tae Kwak
Stephen L. Kopolow
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.