Granted Patent
Utility
US 4,657,580 · App. 06/809,380
Herbicidally active substituted diphenyl ether oxime derivatives
Inventor:
Dennis K. Krass
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Dec 16, 1985
Inventor
Dennis K. Krass
Assignee (at issue)
PPG Industries, 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.