Granted Patent
Utility
US 4,264,593 · App. 06/090,080
Tris(aryl)alkyl phosphonium halides and pesticidal compositions thereof
Inventor:
Edwin L. Sukman
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Oct 31, 1979
Inventor
Edwin L. Sukman
Assignee (at issue)
M&T Chemicals, 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.