Granted Patent
Utility
US 4,328,328 · App. 06/100,098
Continuous process for production of olefin polymers or copolymers
Inventors:
Syuji Minami, Takashi Ueda, Mamoru Kioka, Norio Kashiwa
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Dec 4, 1979
Inventors
Syuji Minami
Takashi Ueda
Mamoru Kioka
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.