Granted Patent
Utility
US 4,921,913 · App. 07/031,293
Powder coating compositions of polyepoxides and acrylic copolymers
Inventor:
Paul H. Pettit, Jr.
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Mar 26, 1987
Inventor
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.