Granted Patent
Utility
US 6,689,849 · App. 10/018,478
Catalyst for bulk polymerization, catalyst for vapor phase polymerization, method of polymerization using these, and olefin polymer obtained with these
Inventors:
Takanori Sadashima, Masami Kanamaru, Tsuyoshi Ota, Hideo Funabashi
Patented Case
View Patent ↗
Granted: Feb 10, 2004
Filed: Dec 19, 2001
Inventors
Takanori Sadashima
Masami Kanamaru
Tsuyoshi Ota
Hideo Funabashi
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.