Patents by Inventor George Roy Trammell

George Roy Trammell 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).

  • False-twist texturing process with hollow friction twist tubes
    Patent number: 3938314
    Abstract: False-twist texturing processes which apply twist with hollow friction tubes, fitted at each end with a toroidal bushing, are improved by using a high friction bushing at the yarn inlet and a lower friction bushing at the yarn outlet. Further improvements are provided by adjustments in the yarn inlet and outlet angles, and the speeds of the bushing surfaces.
    Type: Grant
    Filed: May 10, 1974
    Date of Patent: February 17, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Roy Trammell