Granted Patent
Utility
US 6,569,973 · App. 09/900,346
Process for making vinyl caprolactam-based polymers
Inventors:
Jui-Chang Chuang, Jenn S. Shih, Michael Drzewinski
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Jul 6, 2001
Inventors
Jui-Chang Chuang
Jenn S. Shih
Michael Drzewinski
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.