Patents by Inventor Evan Franklin Evans

Evan Franklin Evans 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 modifying glycol terephthalate polyesters to contain CH.sub.2 - - .sub.2 --N linkages
    Patent number: 3991035
    Abstract: Glycol terephthalate polyesters are modified to contain CH.sub.2 --S or CH.sub.2 --N linkages in molecular chains of the polyester, staple fibers of good strength are prepared from the modified polyesters, fabrics are prepared from the fibers and then treated with hypochlorous acid to develop pilling resistance. The treatment cleaves polyester molecules at the CH.sub.2 --S or CH.sub.2 --N links. Precise control is provided by the amount of modifier used and the relative viscosity of the fibers before the treatment.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: November 9, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Evan Franklin Evans