Granted Patent
Utility
US 4,983,673 · App. 07/288,353
High impact resistant blends of thermoplastic polyamides and modified diblock copolymers
Inventors:
Carl L. Willis, Lorelle A. Pottick
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Dec 22, 1988
Inventors
Carl L. Willis
Lorelle A. Pottick
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.