Patents by Inventor Shiho Uchiyama

Shiho Uchiyama 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).

  • Patent number: 9770692
    Abstract: Provided is a moisture permeable filter medium formed by laminating a hydrophobic layer having hydrophobicity and a hydrophilic layer having hydrophilicity together, in which one of the hydrophobic layer and the hydrophilic layer is composed of a PTFE porous film formed using PTFE, and the other of the hydrophobic layer and the hydrophilic layer is composed of an air permeable sheet to which air is permeable.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: September 26, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventor: Shiho Uchiyama
  • Patent number: 9731251
    Abstract: Provided is a moisture permeable filter medium formed by laminating a hydrophobic layer having hydrophobicity and a hydrophilic layer having hydrophilicity together, in which one of the hydrophobic layer and the hydrophilic layer is composed of a PTFE porous film formed using PTFE, and the other of the hydrophobic layer and the hydrophilic layer is composed of an air permeable sheet to which air is permeable.
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: August 15, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventor: Shiho Uchiyama
  • Publication number: 20160325235
    Abstract: Provided is a method including: a step A of extruding a mixture containing a fine PTFE powder and a liquid lubricant into a sheet form so as to obtain a PTFE sheet; a step B of rolling the PTFE sheet by passing the sheet between a pair of rolls in the longitudinal direction of the sheet; a step C of heating the rolled PTFE sheet to a temperature of 19° C. or higher; a step D of stretching the rolled PTFE sheet having a temperature of 19° C. or higher in the width direction of the sheet; a step E of removing the liquid lubricant from the PTFE sheet; and a step F of stretching the PTFE sheet, from which the liquid lubricant has been removed, in both the longitudinal direction and the width direction so as to form pores in the sheet.
    Type: Application
    Filed: January 6, 2015
    Publication date: November 10, 2016
    Inventors: Shiho UCHIYAMA, Seiji AIZAWA
  • Publication number: 20160325238
    Abstract: Provided is a moisture permeable filter medium formed by laminating a hydrophobic layer having hydrophobicity and a hydrophilic layer having hydrophilicity together, in which one of the hydrophobic layer and the hydrophilic layer is composed of a PTFE porous film formed using PTFE, and the other of the hydrophobic layer and the hydrophilic layer is composed of an air permeable sheet to which air is permeable.
    Type: Application
    Filed: November 26, 2014
    Publication date: November 10, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventor: Shiho Uchiyama
  • Patent number: 9289713
    Abstract: The present invention provides a filter medium causing a low pressure drop. The present invention is a filter medium including a porous fluororesin membrane and an air-permeable support member laminated on at least one surface of the porous fluororesin membrane. In this filter medium, the air-permeable support member is a blended nonwoven fabric containing: core-sheath fibers (A) having a polyester core and a polyolefin sheath; polyester fibers (B); and core-sheath fibers (C) having a polyester core and a copolymerized polyester sheath.
    Type: Grant
    Filed: February 18, 2013
    Date of Patent: March 22, 2016
    Assignee: Nitto Denko Corporation
    Inventors: Shiho Uchiyama, Yuri Horie, Masahiro Arai, Masaaki Mori, Tetsuo Asano, Nobuhiro Matsunaga
  • Publication number: 20150013295
    Abstract: The present invention provides a filter medium causing a low pressure drop. The present invention is a filter medium including a porous fluororesin membrane and an air-permeable support member laminated on at least one surface of the porous fluororesin membrane. In this filter medium, the air-permeable support member is a blended nonwoven fabric containing: core-sheath fibers (A) having a polyester core and a polyolefin sheath; polyester fibers (B); and core-sheath fibers (C) having a polyester core and a copolymerized polyester sheath.
    Type: Application
    Filed: February 18, 2013
    Publication date: January 15, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Shiho Uchiyama, Yuri Horie, Masahiro Arai, Masaaki Mori, Tetsuo Asano, Nobuhiro Matsunaga