Granted Patent
Utility
US 4,436,847 · App. 06/430,108
Rubber compositions
Inventor:
Melvin P. Wagner
Patented Case
View Patent ↗
Granted: Mar 13, 1984
Filed: Sep 30, 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.