Patents by Inventor David E. Bosley

David E. Bosley 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).

  • Addition of diethylene glycol in continuous production of polyester yarn
    Patent number: 4025592
    Abstract: Polyester texturing feed yarns are produced by preparing an ethylene terephthalate polymer from ethylene glycol plus a small amount of diethylene glycol, and dimethyl terephthalate or terephthalic acid, and melt-spinning the polymer into filaments. The filaments may be partially oriented by spinning at high speed without cold drawing, or may be fully drawn after conventional spinning. The diethylene glycol is added in controlled amounts to provide uniform dyeability in fabrics prepared from the yarn after texturing.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: May 24, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David E. Bosley, Patrick J. Duncan