Granted Patent
Utility
US 4,230,839 · App. 05/955,443
Quaternary ammonium adducts of polymerizable tertiary ammonium salts and acrylonitrile
Inventors:
Rudolf S. Buriks, Allen R. Fauke, David W. Griffiths
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Oct 27, 1978
Inventors
Rudolf S. Buriks
Allen R. Fauke
David W. Griffiths
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.