Patents by Inventor Allen E. Stringfellow

Allen E. Stringfellow 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).

  • Method of producing electrical insulation foam
    Patent number: 4173690
    Abstract: An electrical insulation foamed plastic is produced using sulfur hexafluoride adsorbed on molecular sieves as the foaming agent and a low shear mixing technique.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: November 6, 1979
    Assignee: Gould Inc.
    Inventors: Bernard G. Giessner, David H. Reighter, Allen E. Stringfellow