Granted Patent
Utility
US 5,583,188 · App. 08/229,104
Process for producing an olefin polymer or copolymer and catalyst composition therefor
Inventors:
Norio Kashiwa, Mamoru Kioka, Yoshihisa Ushida
Patented Case
View Patent ↗
Granted: Dec 10, 1996
Filed: Apr 18, 1994
Inventors
Norio Kashiwa
Mamoru Kioka
Yoshihisa Ushida
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.