Granted Patent
Utility
US 4,968,765 · App. 07/239,685
Molecularly oriented molded body of ultra-high-molecular-weight ethylene/polyene copolymer
Inventors:
Kazuo Yagi, Akinori Toyota
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: Sep 2, 1988
Inventors
Kazuo Yagi
Akinori Toyota
Assignee (at issue)
Mitsui Petrochemical Industries, 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.