Patents by Inventor Virgil D. Kendall

Virgil D. Kendall 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).

  • Fluid-release mold and the method of manufacturing the same
    Patent number: 3993727
    Abstract: A fluid-releasable mold for forming shaped ware including a porous mold body comprising at least 70% alumina, up to 15% ball clay and up to 15% talc is disclosed. A mold face is formed on one surface of the mold body and fluid-permeable conduit is provided in communication with a second surface of the mold body with means for sealing the fluid-permeable conduit to the second mold body surface to prevent the escape of fluid from the conduit other than through the mold body and out the mold face. The arrangement obviates the problem of gradual loss of porosity which has heretofore limited the service life of fluid-release molds of alumina, ball clay, and talc.
    Type: Grant
    Filed: December 3, 1975
    Date of Patent: November 23, 1976
    Assignee: Wallace-Murray Corporation
    Inventors: Rudolph A. Skriletz, Virgil D. Kendall