Granted Patent
Utility
US 4,550,138 · App. 06/603,008
Polycarbonate compositions with improved low temperature impact strength
Inventors:
Charles F. Paddock, John M. Wefer
Patented Case
View Patent ↗
Granted: Oct 29, 1985
Filed: Apr 23, 1984
Inventors
Charles F. Paddock
John M. Wefer
Assignee (at issue)
Uniroyal Ltd.
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.