Granted Patent
Utility
US 4,330,649 · App. 06/159,440
Process for producing olefin polymers or copolymers
Inventors:
Mamoru Kioka, Hiroaki Kitani, Norio Kashiwa
Patented Case
View Patent ↗
Granted: May 18, 1982
Filed: Jun 13, 1980
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.