Granted Patent
Utility
US 4,200,633 · App. 05/966,221
Thioether containing quaternary ammonium derivatives of 1,4-thiazines as microbiocides
Inventor:
Patrick M. Quinlan
Patented Case
View Patent ↗
Granted: Apr 29, 1980
Filed: Dec 4, 1978
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.