Patents by Inventor Masatoshi Ikemi

Masatoshi Ikemi 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).

  • Separator for electricity storage devices, electrode body using same, and electricity storage device
    Patent number: 10985354
    Abstract: This separator for electricity storage devices comprises a porous base and a thermoplastic polymer layer that is arranged in at least a part of the outermost surface of at least one surface of the porous base, and wherein: a thermoplastic polymer contained in the thermoplastic polymer layer contains a copolymer that has, as a monomer unit, an ethylenically unsaturated monomer (P) having a polyalkylene glycol group; and the thermoplastic polymer layer contains the thermoplastic polymer in an amount of more than 3% by mass but 100% by mass or less if the thermoplastic polymer layer is taken as 100% by mass.
    Type: Grant
    Filed: November 18, 2016
    Date of Patent: April 20, 2021
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroshi Miyazawa, Masanori Nakazawa, Masatoshi Ikemi, Naoki Machida
  • Binder for electricity storage device and binder composition for electricity storage device
    Patent number: 10770706
    Abstract: A binder for an electricity storage device comprising a copolymer having an ethylenic unsaturated monomer having a polyalkyleneglycol group (P) as a monomer unit, wherein the average number of repeating units (n) of polyalkyleneglycol groups of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) is 3 or greater.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: September 8, 2020
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masatoshi Ikemi, Hiroshi Miyazawa
  • Separator for Electricity Storage Devices, Electrode Body Using Same, and Electricity Storage Device
    Publication number: 20200259148
    Abstract: This separator for electricity storage devices comprises a porous base and a thermoplastic polymer layer that is arranged in at least a part of the outermost surface of at least one surface of the porous base, and wherein: a thermoplastic polymer contained in the thermoplastic polymer layer contains a copolymer that has, as a monomer unit, an ethylenically unsaturated monomer (P) having a polyalkylene glycol group; and the thermoplastic polymer layer contains the thermoplastic polymer in an amount of more than 3% by mass but 100% by mass or less if the thermoplastic polymer layer is taken as 100% by mass.
    Type: Application
    Filed: November 18, 2016
    Publication date: August 13, 2020
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Hiroshi Miyazawa, Masanori Nakazawa, Masatoshi Ikemi, Naoki Machida
  • Separator for electricity storage device
    Patent number: 10361415
    Abstract: A separator for electricity storage devices which comprises: a base comprising a porous film; and a thermoplastic polymer arranged on at least one surface of the base. The thermoplastic polymer has a dispersion (?2), defined by the following numerical equation using the areas (Si) of Voronoi polygons obtained by Voronoi tessellation, of 0.01-0.7. (In the equation, Si is the measured area of each Voronoi polygon, m is an average of the measured areas of the Voronoi polygons, and n is the total number of the Voronoi polygons).
    Type: Grant
    Filed: March 3, 2015
    Date of Patent: July 23, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Keitaro Ameyama, Hiroshi Miyazawa, Satoshi Hashimoto, Masatoshi Ikemi, Koichiro Azuma, Kimio Imaizumi
  • BINDER FOR ELECTRICITY STORAGE DEVICE AND BINDER COMPOSITION FOR ELECTRICITY STORAGE DEVICE
    Publication number: 20180261815
    Abstract: A binder for an electricity storage device comprising a copolymer having an ethylenic unsaturated monomer having a polyalkyleneglycol group (P) as a monomer unit, wherein the average number of repeating units (n) of polyalkyleneglycol groups of the ethylenic unsaturated monomer having a polyalkyleneglycol group (P) is 3 or greater.
    Type: Application
    Filed: November 8, 2016
    Publication date: September 13, 2018
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Masatoshi IKEMI, Hiroshi MIYAZAWA
  • Separator for Electricity Storage Device
    Publication number: 20170263907
    Abstract: A separator for electricity storage devices which comprises: a base comprising a porous film; and a thermoplastic polymer arranged on at least one surface of the base. The thermoplastic polymer has a dispersion (?2), defined by the following numerical equation using the areas (Si) of Voronoi polygons obtained by Voronoi tessellation, of 0.01-0.7. (In the equation, Si is the measured area of each Voronoi polygon, m is an average of the measured areas of the Voronoi polygons, and n is the total number of the Voronoi polygons.
    Type: Application
    Filed: March 3, 2015
    Publication date: September 14, 2017
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Keitaro Ameyama, Hiroshi Miyazawa, Satoshi Hashimoto, Masatoshi Ikemi, Koichiro Azuma, Kimio Imaizumi