Granted Patent
Utility
US 4,948,842 · App. 07/265,289
Polyesters having improved impact strength
Inventor:
Errol J. Olivier
Patented Case
View Patent ↗
Granted: Aug 14, 1990
Filed: Oct 26, 1988
Inventor
Errol J. Olivier
Assignee (at issue)
Copolymer Rubber & Chemical Corporation
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.