Patents by Inventor Tsuguo Fujiwara

Tsuguo Fujiwara 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).

  • Hollow fiber fabric and process for producing the same
    Patent number: 5604012
    Abstract: A hollow fiber fabric comprising hollow fibers having a high hollowness ratio of at least 20% and composed of a polymer of a single composition, and the hollow fibers having slits as traces of a removed polymer and the slits being formed in the longitudinal direction of the fibers in such a state that the slits communicate to hollow portions. The fabric is produced by treating a fabric comprising hollow fibers having a high hollowness ratio of at least 20% and composed of a polymer of a single composition with a solvent or solution which dissolves the polymer, to partially dissolve the polymer at low orientation and/or deformation strain concentrated portions, to form slits as traces of a removed polymer in such a state that the slits communicate to hollow portions, along the longitudinal direction of the hollow fibers.
    Type: Grant
    Filed: August 30, 1995
    Date of Patent: February 18, 1997
    Assignee: Teijin Limited
    Inventors: Ichiro Okamoto, Tsuguo Fujiwara, Hiroya Murase, Shigenobu Kobayashi