Granted Patent
Utility
US 6,287,720 · App. 08/981,092
Nonaqueous battery having porous separator and production method thereof
Inventors:
Masaya Yamashita, Shunsuke Oki
Patented Case
View Patent ↗
Granted: Sep 11, 2001
Filed: Dec 12, 1997
Inventors
Masaya Yamashita
Shunsuke Oki
Assignee (at issue)
ASAHI KASEI KABUSHIKI KAISHA
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.