Patents by Inventor Hisaharu Kuwahara

Hisaharu Kuwahara 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).

  • Porous fibrous structure and process for producing the same
    Patent number: 7319078
    Abstract: A novel porous fibrous structure containing from 10 to 100% by weight of wet heat bonding fibers, having cellular cavities in the fibrous structure of the fibers, in which a plurality of indefinite cellular cavities are present independently or in a state of partially connected in the inside of the fibrous structure, at least a portion of the fibers constituting the fibrous structure is heat bonding by the wet heat bonding fibers, and a process for producing such porous fibrous structure.
    Type: Grant
    Filed: October 11, 2002
    Date of Patent: January 15, 2008
    Assignee: Kuraray Co., Ltd.
    Inventors: Tosirou Yamaguchi, Hisaharu Kuwahara, Hirokuni Tanii
  • Porous fibrous structure and process for producing the same
    Publication number: 20030054721
    Abstract: A novel porous fibrous structure containing from 10 to 100% by weight of wet heat bonding fibers, having cellular cavities in the fibrous structure of the fibers, in which a plurality of indefinite cellular cavities are present independently or in a state of partially connected in the inside of the fibrous structure, at least a portion of the fibers constituting the fibrous structure is heat bonding by the wet heat bonding fibers, and a process for producing such porous fibrous structure.
    Type: Application
    Filed: October 30, 2002
    Publication date: March 20, 2003
    Applicant: KURARAY CO. LTD.
    Inventors: Tosirou Yamaguchi, Hisaharu Kuwahara, Hirokuni Tanii
  • Porous fibrous structure and process for producing the same
    Publication number: 20030032358
    Abstract: A novel porous fibrous structure containing from 10 to 100% by weight of wet heat bonding fibers, having cellular cavities in the fibrous structure of the fibers, in which a plurality of indefinite cellular cavities are present independently or in a state of partially connected in the inside of the fibrous structure, at least a portion of the fibers constituting the fibrous structure is heat bonding by the wet heat bonding fibers, and a process for producing such porous fibrous structure.
    Type: Application
    Filed: October 11, 2002
    Publication date: February 13, 2003
    Applicant: KURARAY CO. LTD.
    Inventors: Tosirou Yamaguchi, Hisaharu Kuwahara, Hirokuni Tanii
  • Porous fibrous structure and process for producing the same
    Patent number: 6508897
    Abstract: A novel porous fibrous structure containing from 10 to 100% by weight of wet heat bonding fibers, having cellular cavities in the fibrous structure of the fibers, in which a plurality of indefinite cellular cavities are present independently or in a state of partially connected in the inside of the fibrous structure, at least a portion of the fibers constituting the fibrous structure is heat bonding by the wet heat bonding fibers, and a process for producing such porous fibrous structure.
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: January 21, 2003
    Assignee: Kuraray Co., Ltd.
    Inventors: Tosirou Yamaguchi, Hisaharu Kuwahara, Hirokuni Tanii