Patents by Inventor Toyoaki Ishiwata

Toyoaki Ishiwata 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).

  • Elastic fiber, process for the same and polyester elastomer used thereof
    Patent number: 5853878
    Abstract: The present invention relates to an elastic fiber of polyester elastomer mainly comprising the polyester elastomer further comprising aromatic polyester component as a hard segment and poly(alkyleneoxide)glycol having a number-average molecular weight of 500 to 5000 as a soft segment, wherein a residual elongation after 400 percent stretching does not exceed 100 percent. Made of the polyester elastomer comprising 1,2-bis?4-(2-hydroxyethyl)phenoxy!ethane as the diol component constituting said aromatic polyester component, or 1,4-benzenediethanol and ethyleneglycol as the diol component constituting said aromatic polyester component, the elastic fiber features excellent elastic properties in the event of great deformation and provides suitable material for clothing.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: December 29, 1998
    Assignee: Teijin Limited
    Inventors: Toyoaki Ishiwata, Jiro Sadanobu