Granted Patent
Utility
US 4,404,341 · App. 06/118,325
Process for producing olefin polymers or copolymers and catalyst therefor
Inventors:
Yoshihisa Ushida, Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: Feb 4, 1980
Inventors
Yoshihisa Ushida
Akinori Toyota
Norio Kashiwa
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.