Patents by Inventor Yousei Mitsumori

Yousei Mitsumori 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).

  • Composite fiber having favorable post-treatment processibility and method for producing the same
    Patent number: 6949210
    Abstract: The present invention provides a polytrimethylene terephthalate composite fiber characterized in that the composite fiber is a plurality of single filament which comprises two kinds of polyester components laminated to each other in a side-by-side manner or an eccentric sheath-core manner, at least one polyester component is polytrimethylene terephthalate and the composite fiber satisfies the following conditions: the content of trimethylene terephthalate cyclic dimer in polytrimethylene terephthalate is 2.5 wt % or less, the fiber-fiber dynamic friction coefficient is from 0.2 to 0.4, the degree of intermingling is from 2 to 60 point/m and/or the number of twists is from 2 to 60 T/m and the fiber size fluctuation U % is 1.5% or less.
    Type: Grant
    Filed: March 17, 2003
    Date of Patent: September 27, 2005
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Tadashi Koyanagi, Takao Abe, Teruhiko Matsuo, Yousei Mitsumori
  • Composite fiber having favorable post-treatment processibility and method for producing the same
    Publication number: 20030232194
    Abstract: The present invention provides a polytrimethylene terephthalate composite fiber characterized in that the composite fiber is a plurality of single filament which comprises two kinds of polyester components laminated to each other in a side-by-side manner or an eccentric sheath-core manner, at least one polyester component is polytrimethylene terephthalate and the composite fiber satisfies the following conditions: the content of trimethylene terephthalate cyclic dimer in polytrimethylene terephthalate is 2.5 wt % or less, the fiber-fiber dynamic friction coefficient is from 0.2 to 0.4, the degree of intermingling is from 2 to 60 point/m and/or the number of twists is from 2 to 60 T/m and the fiber size fluctuation U % is 1.5% or less.
    Type: Application
    Filed: March 17, 2003
    Publication date: December 18, 2003
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Tadashi Koyanagi, Takao Abe, Teruhiko Matsuo, Yousei Mitsumori
  • Composite fiber having favorable post-treatment processibility and method for producing the same
    Patent number: 6555220
    Abstract: The present invention provides a polytrimethylene terephthalate composite fiber characterized in that the composite fiber is a plurality of single filament which comprises two kinds of polyester components laminated to each other in a side-by-side manner or an eccentric sheath-core manner, at least one polyester component is polytrimethylene terephthalate and the composite fiber satisfies the following conditions: the content of trimethylene terephthalate cyclic dimer in polytrimethylene terephthalate is 2.5 wt % or less, the fiber-fiber dynamic friction coefficient is from 0.2 to 0.4, the degree of intermingling is from 2 to 60 point/m and/or the number of twists is from 2 to 60 T/m and the fiber size fluctuation U% is 1.5% or less.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: April 29, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Tadashi Koyanagi, Takao Abe, Teruhiko Matsuo, Yousei Mitsumori