Patents by Inventor James Girvan Fraser

James Girvan Fraser 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).

  • Treating polyethylene terephthalate with 1,2-epoxy-3-phenoxypropane and triphenylphosphite
    Patent number: 4122063
    Abstract: According to a preferred embodiment, polyethylene terephthalate polymer is prepared by a process including addition to the melt of 0.45 up to 0.9% by weight of 1,2-epoxy-3-phenoxypropane, and triphenylphosphite, as a stabilizer.
    Type: Grant
    Filed: November 2, 1970
    Date of Patent: October 24, 1978
    Assignee: Millhaven Fibres, Ltd.
    Inventors: William Alexander, Alfredo Guillermo Causa, James Girvan Fraser
  • Process for the control of carboxyl end groups in fiber-forming polyesters
    Patent number: 4016142
    Abstract: In the preparation of a fiber-forming polyester, the number of free carboxyl end groups present in the polymer may be reduced by adding to the polymerized polyester a glycidyl ether which reacts with the carboxyl end groups present to form free hydroxyl end groups.
    Type: Grant
    Filed: November 9, 1966
    Date of Patent: April 5, 1977
    Assignee: Millhaven Fibers, Ltd.
    Inventors: William Alexander, Alfredo Guillermo Causa, James Girvan Fraser