Granted Patent
Utility
US 4,303,597 · App. 06/082,431
O,O-dialkyldithiophosphoryl-N-hydrocarbylthiophosphoramides
Inventors:
Edward L. Kay, Delmar F. Lohr, Jr.
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Oct 5, 1979
Inventors
Edward L. Kay
Delmar F. Lohr, Jr.
Assignee (at issue)
The Firestone Tire & Rubber Company
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.