Granted Patent
Utility
US 5,247,004 · App. 07/912,448
Polymeric-containing compositions with improved oxidative stability
Inventors:
Robert Swisher, Johnson C. Watkins, Peter C. Gaa, James W. Kasunic
Patented Case
View Patent ↗
Granted: Sep 21, 1993
Filed: Jul 13, 1992
Inventors
Robert Swisher
Johnson C. Watkins
Peter C. Gaa
James W. Kasunic
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.