Granted Patent
Utility
US 5,229,458 · App. 07/778,770
Powder coating of particulate thermoset resin and olefin-maleic anhydride copolymer
Inventors:
Karl F. Schimmel, Paul H. Pettit, Jr.
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Oct 21, 1991
Inventors
Karl F. Schimmel
Paul H. Pettit, Jr.
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.