Patents by Inventor Satoshi Miyaoka

Satoshi Miyaoka 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).

  • Microporous polymeric membranes, battery separators, and production methods therefor
    Patent number: 9744500
    Abstract: A multilayer microporous membrane including polymer and having a shutdown temperature of ?130.5° C. and a storage stability of 0.3V or less.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: August 29, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant, Kazuhiro Yamada
  • Microporous film, methods for making such film, and use for such film as battery separator film
    Patent number: 9502705
    Abstract: A microporous membrane includes a low melting polypropylene, the low melting polypropylene being a polypropylene homopolymer or copolymer having an MFR?2.0×102, a Tm of 85.0° C. to 130.0° C., and a Te-Tm?10° C.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: November 22, 2016
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Patrick Brant, Takeshi Ishihara, Satoshi Miyaoka, Donna J. Crowther, Koichi Kono
  • Microporous membranes, methods for making such membranes, and the use of such membranes as battery separator film
    Patent number: 9295950
    Abstract: The invention relates to microporous membranes comprising polymer and having well-balanced permeability, shutdown temperature, and pin puncture strength. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 29, 2016
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant
  • Microporous membranes, methods for making such membranes, and the use of such membranes as battery separator film
    Patent number: 9289728
    Abstract: The invention relates to microporous membranes comprising polymer and having well-balanced permeability, shutdown temperature, and pin puncture strength. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries. The membrane has a shutdown temperature <130.5° C.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: March 22, 2016
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant
  • Multi-layer microporous film
    Patent number: 9203071
    Abstract: The invention relates to microporous membranes having at least two layers, a first layer comprising polymethylpentene and a second layer which comprises a polymer and has a composition that is not substantially the same as that of the first layer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film in, e.g., lithium ion batteries.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: December 1, 2015
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka
  • Microporous film, process for production of the film, and use of the film
    Patent number: 9136517
    Abstract: The invention relates to microporous polymeric membranes suitable for use as battery separator film. The membrane comprises polyethylene, polypropylene, and polymethylpentene. The invention also relates to a method for producing such a membrane, batteries containing such membranes as battery separators, methods for making such batteries, and methods for using such batteries.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: September 15, 2015
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Koichi Kono, Satoshi Miyaoka, Patrick Brant
  • Microporous membranes, methods for making such membranes, and the use of such membranes as battery separator film
    Patent number: 8951677
    Abstract: The present invention relates to microporous membranes comprising polymer and having well-balanced permeability and heat shrinkage, especially heat shrinkage at elevated temperature. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: February 10, 2015
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • Microporous membranes, methods for making these membranes, and the use of these membranes as battery separator films
    Patent number: 8846253
    Abstract: The invention relates to microporous membranes having high meltdown temperature, high air permeability, and high puncture strength. The invention also relates to the production of such membranes and the use of such membranes as battery separator film.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 30, 2014
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • Microporous membranes, methods for making such membranes, and the use of such membranes as battery separator film
    Patent number: 8841032
    Abstract: The invention relates to microporous membranes having high meltdown temperature, low shutdown temperature, and resistance to heat shrinkage at elevated temperature. The membranes can be produced by stretching a sheet comprising polymethylpentene, polyethylene, and diluent, and then removing the diluent. The membranes can be used as battery separator film in, e.g., lithium ion batteries.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: September 23, 2014
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka
  • Microporous membranes and methods for producing and using such membranes
    Patent number: 8709641
    Abstract: A microporous membrane comprising layers, wherein at least one layer comprises a first polymer having a Tm in the range of 115.0° C. to 130.0° C. and an Mw of from 5.0×103 to 4.0×105, and the membrane has a shutdown temperature?130.5° C. and a rupture temperature?170.0° C.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: April 29, 2014
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant, Kazuhiro Yamada
  • MICROPOROUS FILM, METHODS FOR MAKING SUCH FILM, AND USE FOR SUCH FILM AS BATTERY SEPARATOR FILM
    Publication number: 20130288102
    Abstract: A microporous membrane includes a low melting polypropylene, the low melting polypropylene being a polypropylene homopolymer or copolymer having an MFR?2.0×102, a Tm of 85.0° C. to 130.0° C., and a Te-Tm?10° C.
    Type: Application
    Filed: December 20, 2011
    Publication date: October 31, 2013
    Applicant: Toray Battery Separator Film Co., Ltd.
    Inventors: Patrick Brant, Takeshi Ishihara, Satoshi Miyaoka, Donna J. Crowther, Koichi Kono
  • MICROPOROUS FILM, PROCESS FOR PRODUCTION OF THE FILM, AND USE OF THE FILM
    Publication number: 20130164598
    Abstract: The invention relates to microporous polymeric membranes suitable for use as battery separator film. The membrane comprises polyethylene, polypropylene, and polymethylpentene. The invention also relates to a method for producing such a membrane, batteries containing such membranes as battery separators, methods for making such batteries, and methods for using such batteries.
    Type: Application
    Filed: August 2, 2011
    Publication date: June 27, 2013
    Applicant: TORAY BATTERY SEPARATOR FILM CO., LTD.
    Inventors: Takeshi Ishihara, Koichi Kono, Satoshi Miyaoka, Patrick Brant
  • Multi-layer microporous film
    Patent number: 8338020
    Abstract: Embodiments of the invention relate to microporous membranes that include first and second layers. The first layer includes ?20.0 wt. % polymethylpentene and the second layer includes a compatibilizer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: December 25, 2012
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM
    Publication number: 20120088149
    Abstract: The present invention relates to microporous membranes comprising polymer and having well-balanced permeability and heat shrinkage, especially heat shrinkage at elevated temperature. The invention also relates to methods for making such membranes, and the use of such membranes as battery separator film in, e.g., lithium ion secondary batteries.
    Type: Application
    Filed: June 8, 2010
    Publication date: April 12, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM
    Publication number: 20120082899
    Abstract: The invention relates to microporous membranes having high meltdown temperature, low shutdown temperature, and resistance to heat shrinkage at elevated temperature. The membranes can be produced by stretching a sheet comprising polymethylpentene, polyethylene, and diluent, and then removing the diluent. The membranes can be used as battery separator film in, e.g., lithium ion batteries.
    Type: Application
    Filed: June 8, 2010
    Publication date: April 5, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka
  • MULTI-LAYER MICROPOROUS FILM
    Publication number: 20120077072
    Abstract: Embodiments of the invention relate to microporous membranes that include first and second layers. The first layer includes ?20.0 wt. % polymethylpentene and the second layer includes a compatibilizer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film.
    Type: Application
    Filed: June 8, 2010
    Publication date: March 29, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • MULTI-LAYER MICROPOROUS FILM
    Publication number: 20120077073
    Abstract: The invention relates to microporous membranes having at least two layers, a first layer comprising polymethylpentene and a second layer which comprises a polymer and has a composition that is not substantially the same as that of the first layer. The invention also relates to methods for making such membranes and the use of such membranes as battery separator film in, e.g., lithium ion batteries.
    Type: Application
    Filed: June 8, 2010
    Publication date: March 29, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka
  • MICROPOROUS MEMBRANES, METHODS FOR MAKING THESE MEMBRANES, AND THE USE OF THESE MEMBRANES AS BATTERY SEPARATOR FILMS
    Publication number: 20120070748
    Abstract: The invention relates to microporous membranes having high meltdown temperature, high air permeability, and high puncture strength. The invention also relates to the production of such membranes and the use of such membranes as battery separator film.
    Type: Application
    Filed: June 8, 2010
    Publication date: March 22, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Patrick Brant
  • MICROPOROUS MEMBRANES AND METHODS FOR MAKING AND USING SUCH MEMBRANES
    Publication number: 20120040232
    Abstract: This invention relates to microporous membranes comprising polyolefin, the use of such membranes as battery separators, and methods for producing such microporous membranes. In particular, the invention relates to microporous membranes having a shutdown temperature in the range of 120.0° C. to 130.0° C. and a maximum solid state heat shrinkage ?30.0%.
    Type: Application
    Filed: March 5, 2010
    Publication date: February 16, 2012
    Applicant: Toray Tonen Specialty Separator Godo Kaisha
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant
  • MICROPOROUS MEMBRANES, METHODS FOR MAKING SUCH MEMBRANES, AND THE USE OF SUCH MEMBRANES AS BATTERY SEPARATOR FILM
    Publication number: 20120034518
    Abstract: A microporous membrane comprising polyolefin copolymer, the membrane having a shutdown temperature?130.5° C. and a shutdown activation energy E2?3.5×103 J/mol.
    Type: Application
    Filed: March 5, 2010
    Publication date: February 9, 2012
    Applicant: TORAY TONEN SPECIALTY SEPARATOR GODO KAISHA
    Inventors: Takeshi Ishihara, Satoshi Miyaoka, Koichi Kono, Donna J. Crowther, Patrick Brant