Patents by Inventor William Kenneth Wilkinson

William Kenneth Wilkinson 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 dyeing filaments of acrylic polymer
    Patent number: 3944386
    Abstract: A process is disclosed for dyeing a bundle of dry-spun acrylonitrile polymer filaments before the solvent remaining after the spinning step has been extracted. The filaments having a water content of not over 30%, are subjected to a dye bath, and drawn while immersed in the bath at least 1.5.times. and are then washed to rinse them and to extract spinning solvent.
    Type: Grant
    Filed: November 12, 1973
    Date of Patent: March 16, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William Kenneth Wilkinson