Granted Patent
Utility
US 3,974,218 · App. 05/269,857
Pre-emergent chemical method of combating unwanted vegetation
Inventor:
Roger P. Cahoy
Patented Case
View Patent ↗
Granted: Aug 10, 1976
Filed: Jul 7, 1972
Inventor
Roger P. Cahoy
Assignee (at issue)
Gulf Research & Development 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.