Granted Patent
Utility
US 5,039,730 · App. 07/269,746
Fiber reinforced heat-resistant polyolefin compositions
Inventor:
Akira Yokoyama
Patented Case
View Patent ↗
Granted: Aug 13, 1991
Filed: Oct 27, 1988
Inventor
Akira Yokoyama
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.