Patents by Inventor John Walter Showers

John Walter Showers 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).

  • Manufacture of polyesters
    Patent number: 4070342
    Abstract: In a continuous process for production of polyester polymers, polymer additives are added to the process stream at a point where the polymer is molten by injecting a stable liquid dispersion formed from a liquid polyisobutene and the requisite polymer additives. The process is particularly useful in production of thermally stabilized polyesters wherein a stabilizing amount of a copper complex compound is incorporated therein.
    Type: Grant
    Filed: December 20, 1976
    Date of Patent: January 24, 1978
    Assignee: Allied Chemical Corporation
    Inventors: Stanley David Lazarus, John Walter Showers
  • Process for melt-spinning synthetic fibers
    Patent number: 4045534
    Abstract: An improved process and apparatus for production of synthetic multifilamentary yarns having uniform quality. The method comprises extruding a molten synthetic polymer downwardly through a spinneret, advancing the extruded filaments downwardly through a substantially stationary column of heated air, and subsequently advancing the filaments downwardly through a quenching zone wherein they are in contact with cooling air introduced into the path of the filaments under controlled conditions of air velocity and direction of flow.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: August 30, 1977
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Dong Wha Kim, Orin Wyatt Norwood, John Walter Showers, Eugene Addison Swanson, Gene Clyde Weedon
  • Apparatus for melt-spinning synthetic fibers
    Patent number: 3936253
    Abstract: An improved process and apparatus for production of synthetic multifilamentary yarns having uniform quality. The method comprises extruding a molten synthetic polymer downwardly through a spinneret, advancing the extruded filaments downwardly through a substantially stationary column of heated air, and subsequently advancing the filaments downwardly through a quenching zone wherein they are in contact with cooling air introduced into the path of the filaments under controlled conditions of air velocity and direction of flow.
    Type: Grant
    Filed: December 10, 1974
    Date of Patent: February 3, 1976
    Assignee: Allied Chemical Corporation
    Inventors: William Bernard Fisher, Dong Wha Kim, Orin Wyatt Norwood, John Walter Showers, Eugene Addison Swanson, Gene Clyde Weedon