Patents by Inventor Walter Darchuk

Walter Darchuk 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).

  • Flame resistant, thermally stable polyvinyl chloride-polyester blends
    Patent number: 4004405
    Abstract: Flame resistant, thermally stable yarns containing 50 to 80% by weight syndiotactic polyvinyl chloride fibers and 20 to 50% by weight polyester fibers spun together to form said yarns and fabrics made therefrom. The syndiotactic index of the polyvinyl chloride is at least 1.8 and preferably greater than about 2.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: January 25, 1977
    Assignee: Dan River, Incorporated
    Inventor: Walter Darchuk