Patents by Inventor Ian Charles Twilley

Ian Charles Twilley 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).

  • Process for preparing high strength polyamide and polyester filamentary yarn
    Patent number: 4113821
    Abstract: Preparation of improved yarns from synthetic linear polymer filaments by melt spinning followed by substantially immediately heating said filaments above their second order transition temperature and drawing said filaments substantially instantly at a temperature in the range of from about above their second order transition temperature to within about 5.degree. C. of their melting point, said heating being preceded by pretensioning of said filaments at a constant tension level greater than about 0.005 gram per denier and less than a tension level required to draw said filaments.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: September 12, 1978
    Assignee: Allied Chemical Corporation
    Inventors: William Norman Russell, James Isaac Bruton, Ian Charles Twilley