Granted Patent
Utility
US 6,316,557 · App. 09/308,129
Catalysts for the polymerization of olefins, process for the production of olefin polymers, and processes for the production of styrene polymers
Inventors:
Haruhito Sato, Toshiya Abiko, Satoshi Ikeuchi, Junichi Matsumoto, Harumi Nakashima
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: May 14, 1999
Inventors
Haruhito Sato
Toshiya Abiko
Satoshi Ikeuchi
Junichi Matsumoto
Harumi Nakashima
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.