Granted Patent
Utility
US 4,342,706 · App. 06/185,351
Benzene sulfonate quaternary ammonium salts
Inventors:
Donald E. Conner, Arnold W. Fogel
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Sep 8, 1980
Inventors
Donald E. Conner
Arnold W. Fogel
Assignee (at issue)
Van Dyk & Company Inc.
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.