Granted Patent
Utility
US 4,873,336 · App. 07/183,559
Process for the preparation of N-vinyl lactams
Inventors:
Kou-Chang Liu, Paul D. Taylor
Patented Case
View Patent ↗
Granted: Oct 10, 1989
Filed: Mar 28, 1988
Inventors
Kou-Chang Liu
Paul D. Taylor
Assignee (at issue)
GAF Corporation
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.