Granted Patent
Utility
US 5,453,333 · App. 07/992,181
Porous membrane having single layer structure, battery separator made thereof, preparations thereof and battery equipped with same battery separator
Inventors:
Tsutomu Takauchi, Manabu Yamazaki, Yuichi Mori
Patented Case
View Patent ↗
Granted: Sep 26, 1995
Filed: Dec 17, 1992
Inventors
Tsutomu Takauchi
Manabu Yamazaki
Yuichi Mori
Assignee (at issue)
W.R. Grace & Co. Conn.
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.