Granted Patent
Utility
US 5,641,843 · App. 08/560,515
Process for polymerization of alpha-olefins
Inventors:
Toshiyuki Tsutsui, Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Nov 17, 1995
Inventors
Toshiyuki Tsutsui
Akinori Toyota
Norio Kashiwa
Assignee (at issue)
Mitsui Petrochemical Industries, 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.