Granted Patent
Utility
US 4,666,508 · App. 06/748,641
Sulfamoyl urea derivatives
Inventor:
Barry Van Gemert
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Jun 25, 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.