Granted Patent
Utility
US 5,194,531 · App. 07/688,286
Process for producing polyolefins
Inventors:
Masatoshi Toda, Hideo Funabashi, Ryo Aburatani, Akinobu Sugahara
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Apr 22, 1991
Inventors
Masatoshi Toda
Hideo Funabashi
Ryo Aburatani
Akinobu Sugahara
Assignee (at issue)
Idemitsu Petrochemical Co., 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.