Granted Patent
Utility
US 4,297,484 · App. 06/032,044
Quaternized derivatives of polymerized pyridines and quinolines
Inventor:
Patrick M. Quinlan
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Apr 23, 1979
Inventor
Patrick M. Quinlan
Assignee (at issue)
Petrolite 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.