Patents by Inventor Kou Tsukiyama

Kou Tsukiyama 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).

  • Polyester fibers
    Patent number: 4621020
    Abstract: A papermaking polyester fiber having a denier number within the range of from about 0.1 to about 3.0 and a length within the range of from about 5 mm to about 25 mm and providing a packing factor of more than about 40 and a quantity of residual fibers of less than about 1000 mg on a flat screen plate when measured by a flat screen method.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: November 4, 1986
    Assignee: Teljin Ltd.
    Inventors: Mikio Tashiro, Kou Tsukiyama