Granted Patent
Utility
US 6,824,865 · App. 09/806,309
Microporous polyolefin film and process for producing the same
Inventors:
Hidehiko Funaoka, Kotaro Takita, Norimitsu Kaimai, Shigeaki Kobayashi, Koichi Kono
Patented Case
View Patent ↗
Granted: Nov 30, 2004
Filed: Jul 6, 2001
Inventors
Hidehiko Funaoka
Kotaro Takita
Norimitsu Kaimai
Shigeaki Kobayashi
Koichi Kono
Assignee (at issue)
Tonen Chemical Corporation
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.