Granted Patent
Utility
US 4,288,243 · App. 06/166,017
2',5'-Dioxo-1'-pyrrolydinyl 5-(2-halo-4-trifluoromethylphenoxy)-2-halo-, cyano- or nitrobenzoates
Inventor:
William S. Grove
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Jul 7, 1980
Inventor
William S. Grove
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.