Granted Patent
Utility
US 6,462,201 · App. 09/222,197
Process for the production of N-vinyl-2-pyrrolidone by vinylation
Inventors:
Anatoly Alexander, Mikhail Raykh
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Dec 29, 1998
Inventors
Anatoly Alexander
Mikhail Raykh
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.