Granted Patent
Utility
US 4,988,765 · App. 07/288,366
High impact resistant blends of thermoplastic polyamides and modified diblock copolymers
Inventors:
Lorelle A. Pottick, Carl L. Willis
Patented Case
View Patent ↗
Granted: Jan 29, 1991
Filed: Dec 22, 1988
Inventors
Lorelle A. Pottick
Carl L. Willis
Assignee (at issue)
SHELL OIL COMPANY
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.