Patents by Inventor Sylvia Etchells

Sylvia Etchells 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).

  • Polyamide fiber
    Patent number: 4091022
    Abstract: A conductive fibre having soil-hiding properties and good dye light fastness properties comprising a fibre-forming polyamide having an additive dispersed therein as a separate phase, the additive being derived from a boric acid and a poly(oxyalkylene) material of average molecular weight at least 600. The soil-hiding properties are produced on scouring the fibre.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: May 23, 1978
    Assignee: Imperial Chemical Industries Limited
    Inventor: Sylvia Etchells
  • Process for producing conductive fiber
    Patent number: 4052493
    Abstract: A conductive fiber having soil-hiding properties and good dye light fastness properties comprising a fiber-forming polyamide having an additive dispersed therein as a separate phase, the additive being derived from a boric acid and a poly(oxyalkylene) material of average molecular weight at least 600. The soil-hiding properties are produced on scouring the fiber.
    Type: Grant
    Filed: November 8, 1972
    Date of Patent: October 4, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventor: Sylvia Etchells
  • Plasticizers as adhesion promoters in polyester/polyamide heterofilaments
    Patent number: 3975351
    Abstract: The present invention relates to a process for improving the adhesion between normally non-adhesive components in a multi-component polymeric fiber by the addition of one or more defined plasticizers to one or more of the components.
    Type: Grant
    Filed: January 27, 1972
    Date of Patent: August 17, 1976
    Assignee: Imperial Chemical Industries Inc.
    Inventor: Sylvia Etchells