Granted Patent
Utility
US 6,552,136 · App. 09/774,174
Organosilicon compound, catalyst for olefin polymer production, and method for producing olefin polymer
Inventors:
Tsuyoshi Ota, Takanori Sadashima, Yasunori Kadoi, Toshio Isozaki, Kiyokazu Katayama
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Feb 1, 2001
Inventors
Tsuyoshi Ota
Takanori Sadashima
Yasunori Kadoi
Toshio Isozaki
Kiyokazu Katayama
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.