Granted Patent
Utility
US 4,891,111 · App. 07/185,618
Cationic electrocoating compositions
Inventors:
Gregory J. McCollum, Robert R. Zwack, Roger L. Scriven
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Apr 25, 1988
Inventors
Gregory J. McCollum
Robert R. Zwack
Roger L. Scriven
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.