Granted Patent
Utility
US 4,933,393 · App. 07/269,576
Polyolefin composition
Inventors:
Akinori Toyota, Mamoru Kioka, Takeshi Shiraki, Kunie Hiroshige
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Nov 10, 1988
Inventors
Akinori Toyota
Mamoru Kioka
Takeshi Shiraki
Kunie Hiroshige
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.