Patents by Inventor Itsuo Kurahashi

Itsuo Kurahashi 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).

  • Modified regenerated cellulose fiber and fiber product thereof
    Patent number: 7074245
    Abstract: A modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving. The modified regenerated cellulose fiber can be obtained by adding 0.5–3.0% by weight of a grounder of naphthol dye to the regenerated cellulose fiber in a matrix of the regenerated cellulose fiber, the grounder being selected from the group having a medium to high level of affinity to the regenerated cellulose fiber. A variety of dyed fiber products can be obtained by treating yarn or knitted/woven fabric made of the above modified regenerated cellulose fiber with a developer of naphthol dye.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: July 11, 2006
    Assignee: Fuji Spinning Co., Ltd.
    Inventors: Itsuo Kurahashi, Masatoshi Kudou, Hiroaki Tanibe, Koji Ando
  • Modified regenerated cellulose fiber and fiber product thereof
    Publication number: 20050044643
    Abstract: The present invention simplifies the complicated dyeing process using a naphthol dye, and provides a modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving. A modified regenerated cellulose fiber can be obtained by containing 0.5-3.0% by weight of a grounder of naphthol dye to the regenerated cellulose fiber in a matrix consisting of the regenerated cellulose fiber, wherein the grounder is selected from the group having a medium to high level of affinity to the regenerated cellulose fiber. A variety of dyed fiber products can be obtained by treating yarn or knitted/woven fabric made of the above modified regenerated cellulose fiber with a developer of naphthol dye.
    Type: Application
    Filed: October 14, 2004
    Publication date: March 3, 2005
    Inventors: Itsuo Kurahashi, Masatoshi Kudou, Hiroaki Tanibe, Koji Ando
  • Modified regenerated cellulose fiber and fiber product thereof
    Patent number: 6821304
    Abstract: The present invention simplifies the complicated dyeing process using a naphthol dye, and provides a modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving. A modified regenerated cellulose fiber can be obtained by containing 0.5-3.0% by weight of a grounder of naphthol dye to the regenerated cellulose fiber in a matrix consisting of the regenerated cellulose fiber, wherein the grounder is selected from the group having a medium to high level of affinity to the regenerated cellulose fiber. A variety of dyed fiber products can be obtained by treating yarn or knitted/woven fabric made of the above modified regenerated cellulose fiber with a developer of naphthol dye.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: November 23, 2004
    Assignee: Fuji Spinning Co., Ltd.
    Inventors: Itsuo Kurahashi, Masatoshi Kudou, Hiroaki Tanibe, Koji Ando
  • Modified regenerated cellulose fiber and fiber product thereof
    Publication number: 20030082375
    Abstract: The present invention simplifies the complicated dyeing process using a naphthol dye, and provides a modified regenerated cellulose fiber which enables dyeing in different colors by combining the modified regenerated cellulose fiber and other fibers by means of mixed spinning or union knitting/weaving.
    Type: Application
    Filed: June 19, 2002
    Publication date: May 1, 2003
    Inventors: Itsuo Kurahashi, Masatoshi Kudou, Hiroaki Tanibe, Koji Ando
  • Process for producing granular porous chitosan
    Patent number: 4833237
    Abstract: A process for producing granular porous chitosan of extremely uniform particle size and having uniform fine pores on the spherical surface and cut cross sectional face. The process comprises dissolving a low molecular weight chitosan into an aqueous acidic solution, pouring the solution into a basic solution and thereby coagulating the product to precipitate porous chitosan.
    Type: Grant
    Filed: February 5, 1987
    Date of Patent: May 23, 1989
    Assignee: Fuji Spinning Co., Ltd.
    Inventors: Yoshihide Kawamura, Hiroaki Tanibe, Itsuo Kurahashi, Hiroshi Seo, Saburo Nakajima