Patents by Inventor Tsumoru Kuwabara

Tsumoru Kuwabara 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).

  • Reflecting sheet
    Patent number: 8358468
    Abstract: A reflecting sheet of the invention includes at least a surface layer portion and an inner layer portion, where the surface layer portion contains at least 0.3 g/m2 to 20 g/m2 of an inorganic powder and a polyolefin resin (C), the inner layer portion contains a polyolefin resin (A) and at least one kind of resins (B) incompatible with the polyolefin resin (A) at temperatures enabling stretching of the polyolefin resin(A), the surface layer portion meets (n1?n2)/n2?0.20 (n1: refractive index of the inorganic powder, n2: refractive index of the polyolefin resin (C)), and the inner layer portion has voids.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: January 22, 2013
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Shinya Hamasaki, Yuuichi Arito, Kenji Takasa, Tsumoru Kuwabara
  • REFLECTING SHEET
    Publication number: 20100165472
    Abstract: A reflecting sheet of the invention includes at least a surface layer portion and an inner layer portion, where the surface layer portion contains at least 0.3 g/m2 to 20 g/m2 of an inorganic powder and a polyolefin resin (C), the inner layer portion contains a polyolefin resin (A) and at least one kind of resins (B) incompatible with the polyolefin resin (A) at temperatures enabling stretching of the polyolefin resin(A), the surface layer portion meets (n1?n2)/n2?0.20 (n1: refractive index of the inorganic powder, n2: refractive index of the polyolefin resin (C)), and the inner layer portion has voids.
    Type: Application
    Filed: June 5, 2008
    Publication date: July 1, 2010
    Applicant: ASAHI KASEI E-MATERIALS CORPORATION
    Inventors: Shinya Hamasaki, Yuuichi Arito, Kenji Takasa, Tsumoru Kuwabara
  • Composite hydrophilic membrane and method for manufacture thereof
    Patent number: 4670146
    Abstract: A composite hydrophilic membrane comprising a very thin semipermeable hydrophilic membrane containing a sulfonic group and a polyethylenic microporous membrane containing sulfonic group. This hydrophilic membrane has specially high permeation rate of water and excellent separation ability.The composite hydrophilic membrane is manufactured by a method which comprises fusing a very thin membrane containing an ethylenic copolymer onto the surface of a polyethylenic microporous membrane or a polyethylenic membrane capable of being converted into a microporous membrane thereby forming a composite film, converting the resin film prior to and/or during and/or after sulfonation into a microporous membrane, and causing the composite film to react with a sulfonating agent. This method permits easy and efficient production of the composite hydrophilic membrane.
    Type: Grant
    Filed: June 23, 1982
    Date of Patent: June 2, 1987
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tadashi Inoue, Tsumoru Kuwabara, Kiyotaka Yoshie