Granted Patent
Utility
US 4,725,656 · App. 06/783,816
Process for producing olefin polymers
Inventors:
Norio Kashiwa, Akinori Toyota, Mamoru Kioka
Patented Case
View Patent ↗
Granted: Feb 16, 1988
Filed: Oct 7, 1985
Inventors
Norio Kashiwa
Akinori Toyota
Mamoru Kioka
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.