Patents by Inventor Susumu Yotsutsuji

Susumu Yotsutsuji 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).

  • Biodegradable fibers and fabrics, and method for controlling their biodegradability
    Patent number: 6699581
    Abstract: Biodegradable fibers of polylactic acid having a number-average molecular weight of from 50,000 to 150,000, have an interior portion having a higher alkali solubility than the exterior portion of the fiber. The fibers also have from 5 to 50 cracks/10 cm. The physical properties of these fibers are suitable for practical use, and the biodegradation of these fibers is controllable.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: March 2, 2004
    Assignee: Kuraray Co., Ltd.
    Inventors: Susumu Yotsutsuji, Yoshiyuki Andou, Akihiro Hokimoto
  • Biodegradable fibers and fabrics, and method for controlling their biodegradability
    Publication number: 20030092338
    Abstract: Biodegradable fibers of polylactic acid having a number-average molecular weight of from 50,000 to 150,000, have an interior portion having a higher alkali solubility than the exterior portion of the fiber. The fibers also have from 5 to 50 cracks/10 cm. The physical properties of these fibers are suitable for practical use, and the biodegradation of these fibers is controllable.
    Type: Application
    Filed: November 14, 2002
    Publication date: May 15, 2003
    Applicant: KURARAY CO., LTD.
    Inventors: Susumu Yotsutsuji, Yoshiyuki Andou, Akihiro Hokimoto