Granted Patent
Utility
US 6,696,527 · App. 09/857,191
Olefin copolymers and films and sheets
Inventors:
Kiyohiko Yokota, Noriyuki Tani, Nobuhide Ishihara, Junichi Matsumoto
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Jun 20, 2001
Inventors
Kiyohiko Yokota
Noriyuki Tani
Nobuhide Ishihara
Junichi Matsumoto
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.