Granted Patent
Utility
US 6,620,900 · App. 10/071,753
Proliferous copolymer of vinyl pyrrolidone and vinyl acetate
Inventors:
Edward G. Malawer, James P. Cullen, Chi-San Wu, Laurence Senak, William Drefko
Patented Case
View Patent ↗
Granted: Sep 16, 2003
Filed: Feb 7, 2002
Inventors
Edward G. Malawer
James P. Cullen
Chi-San Wu
Laurence Senak
William Drefko
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.