Patents by Inventor Teruyoshi Kawata

Teruyoshi Kawata 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 polyurethane yarn and method of manufacturing the same
    Patent number: 6048613
    Abstract: The present invention relates to melt-spun polyurethane elastic fiber having a degree of luster of 70 or less, the degree of luster being defined as (I/Io).times.100 where the amount of light reflecting off the surface of the fiber is I and the amount of light reflecting off a standard white plate is Io. On the surface of preferable polyurethane elastic fiber, 10 or more mountain-like protrusions of 0.2 to 5.05 to 110 parts by weight of 5 to 110 parts by weight of .mu.m in height are present every 10 .mu.m fiber in the axial direction.Also, the present invention relates to a process for producing polyurethane elastic fiber, comprising melt-spinning butylene terephthalate-based crystalline polyester (A) and thermoplastic polyurethane (B) wherein before spinning, the compound (A) is melt-mixed with thermoplastic polyurethane (B-1) having isocyanate groups in an amount of 150 to 500 .mu.mol/g.Further, the present invention relates to covered fiber comprising the polyurethane elastic fiber as a core.
    Type: Grant
    Filed: March 19, 1999
    Date of Patent: April 11, 2000
    Assignee: Kanebo, Limited
    Inventors: Yukio Yamakawa, Yasushi Nakai, Kiyoshi Yoshimoto, Shigeru Tokutomi, Teruyoshi Kawata