Granted Patent
Utility
US 4,602,939 · App. 06/776,537
Sulfamoyl urea derivatives
Inventor:
Barry Van Gemert
Patented Case
View Patent ↗
Granted: Jul 29, 1986
Filed: Sep 16, 1985
Inventor
Barry Van Gemert
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.