Granted Patent
Utility
US 5,330,949 · App. 07/515,782
Method for producing polyolefin
Inventors:
Hideo Funabashi, Akira Tanaka, Rikuo Ohnishi, Toshikazu Kasahara, Takashi Yamawaki
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Apr 26, 1990
Inventors
Hideo Funabashi
Akira Tanaka
Rikuo Ohnishi
Toshikazu Kasahara
Takashi Yamawaki
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.