Granted Patent
Utility
US 4,247,490 · App. 06/073,684
Process for the purification of dialkylphosphorochloridothioates
Inventors:
Charles R. Bergeron, Alfred P. Anderson, Thomas Walter
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: Sep 10, 1979
Inventors
Charles R. Bergeron
Alfred P. Anderson
Thomas Walter
Assignee (at issue)
Ethyl 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.