Granted Patent
Utility
US 4,330,640 · App. 06/159,578
Novel acrylic polymers and the Michael adducts thereof useful in coating applications
Inventor:
Stephen L. Buchwalter
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Jun 16, 1980
Inventor
Stephen L. Buchwalter
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.