Patents by Inventor Tsutomu Takauchi

Tsutomu Takauchi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Porous membrane having single layer structure, battery separator made thereof, preparations thereof and battery equipped with same battery separator
    Patent number: 5453333
    Abstract: A porous membrane of a single layer structure formed from a first polymer having a melting point of at least 130.degree. C. and a second polymer having a melting point of up to 120.degree. C., wherein the walls of the pores of the membrane have an amount of second polymer insufficient to block the permeability of the pores under normal operating temperature conditions yet sufficient to do so when the membrane reaches a temperature equal to or greater than the second polymer's melting point.
    Type: Grant
    Filed: December 17, 1992
    Date of Patent: September 26, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Tsutomu Takauchi, Manabu Yamazaki, Yuichi Mori