Patents by Inventor Takayuki Wani

Takayuki Wani 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).

  • Composite polymer electrolyte membrane
    Patent number: 5858264
    Abstract: A composite polymer electrolyte membrane which includes an ion-conductive polymer gel contained and supported by a matrix material formed of a porous polytetrafluoroethylene membrane. The porous polytetrafluoroethylene membrane has an internal structure which defines a three-dimensional network of interconnected passages and pathways throughout the membrane. The composite polymer electrolyte membrane has a tensile break strength of at least 10 MPa in at least two orthogonal planar directions, ion conductivity of at least 1 mS/cm, and is useful as a separator between electrodes of a lithium secondary cell.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: January 12, 1999
    Assignees: Japan Gore-Tex, Inc., Nippon Telegraph and Telephone Corporation
    Inventors: Toshihiro Ichino, Yukitoshi Takeshita, Fumio Yamamoto, Hiroshi Kato, Naofumi Mushiake, Takayuki Wani
  • Electric double-layer capacitor and method for making the same
    Patent number: 5682288
    Abstract: The invention provides an improved double-layer capacitor in which the improvement is a planar layered electrode assembly which has low electrical resistance and which has high electric storage capacity. The electrode material is produced by a process in which acicular electrically-conductive particles are blended with a binder, oriented by extrusion, and cut to form planar electrode discs or plates in which the acicular particles are oriented as nearly perpendicular as possible to the flat surfaces of the electrode.
    Type: Grant
    Filed: October 31, 1995
    Date of Patent: October 28, 1997
    Assignee: Japan Gore-Tex, Inc.
    Inventor: Takayuki Wani
  • Electrochemical cell diaphragm and an electrochemical cell
    Patent number: 5409588
    Abstract: A porous composite material for diaphragms for high-output electrochemical cells such as lithium cells. The material is a layered structure of fluoropolymer and polyolefin that provides a shut-down capability that safeguards against dangerous failure of the cell, such as a rupture or fire that may result from a short-circuit or other high-rate electric discharge.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: April 25, 1995
    Assignee: Japan Gore-Tex, Inc.
    Inventors: Naofumi Mushiake, Takayuki Wani, Hiroshi Kato, Takeshi Sagara, Fumihiro Sasaki
  • Carrier sheet for printed circuits and semiconductor chips
    Patent number: 5252383
    Abstract: A carrier sheet for printed circuits and semiconductor chips having enhanced adhesion of conductive metal layers to a fluororesin surface resulting from rendering the fluororesin surface hydrophilic by a hydrophilic macromolecule before plating the metal onto the surface.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 12, 1993
    Assignee: Japan Gore-Tex, Inc.
    Inventors: Sunao Fukutake, Kazuhiko Ohashi, Takayuki Wani
  • Porous fluorores in material plated with a metal
    Patent number: 5190813
    Abstract: A platinum or platinum-alloy plated porous fluoropolymer membrane where the plated metal adheres to the membrane through a coating of a cation-exchange material on the membrane.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: March 2, 1993
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Kazuhiko Ohashi, Hiroshi Kato, Takayuki Wani
  • Metallized porous flourinated resin and process therefor
    Patent number: 5188890
    Abstract: A metallized porous fluorinated polymer in which at least the inside surfaces are coated with a hydrophilic fluorinated polymer and the surface of the hydrophilic polymer coated with a metal film and a process for its manufacture.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: February 23, 1993
    Assignee: Japan Gore-Tex, Inc.
    Inventors: Kazuhiko Ohashi, Hiroshi Kato, Takayuki Wani