Granted Patent
Utility
US 4,234,576 · App. 06/027,609
Phenoxybenzylphosphonium salt pesticides
Inventor:
Michael J. Brown
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Apr 5, 1979
Inventor
Michael J. Brown
Assignee (at issue)
GAF 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.