Granted Patent
Utility
US 4,208,203 · App. 05/329,938
Method of protecting corn from herbicides
Inventor:
Otto L. Hoffmann
Patented Case
View Patent ↗
Granted: Jun 17, 1980
Filed: Feb 5, 1973
Inventor
Otto L. Hoffmann
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.