Granted Patent
Utility
US 5,091,353 · App. 07/423,586
Process for producing ethylene copolymer
Inventors:
Mamoru Kioka, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Oct 17, 1989
Inventors
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.