Granted Patent
Utility
US 6,316,561 · App. 09/381,279
Process for producing olefin polymers
Inventor:
Mitsugu Kanzawa
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Oct 26, 1999
Inventor
Mitsugu Kanzawa
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.