Granted Patent
Utility
US 4,300,988 · App. 06/172,308
Polybutylene and conjugated diene butyl polymer blends
Inventors:
Anthony J. Berejka, Richard Wayne Bradley
Patented Case
View Patent ↗
Granted: Nov 17, 1981
Filed: Jul 25, 1980
Inventors
Anthony J. Berejka
Richard Wayne Bradley
Assignee (at issue)
Radiation Dynamics, 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.