Granted Patent
Utility
US 4,401,589 · App. 06/322,201
Process for producing olefin polymers or copolymers
Inventors:
Mamoru Kioka, Hiroaki Kitani, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Nov 17, 1981
Inventors
Mamoru Kioka
Hiroaki Kitani
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.