Granted Patent
Utility
US 4,474,908 · App. 06/382,542
Rubber compositions
Inventor:
Melvin P. Wagner
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: May 27, 1982
Inventor
Melvin P. Wagner
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.