Granted Patent
Utility
US 4,966,944 · App. 07/262,283
Impact propylene copolymers with improved bruise resistance
Inventor:
Webster W. Kiang
Patented Case
View Patent ↗
Granted: Oct 30, 1990
Filed: Oct 25, 1988
Inventor
Webster W. Kiang
Assignee (at issue)
Quantum 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.