Patents by Inventor Mark L. Witmer

Mark L. Witmer 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).

  • Refractory u-bends and methods of manufacture
    Patent number: 6125891
    Abstract: A curved pipe segment, preferably a U-bend made from a silicon carbide-containing material having a body portion with an inner and outer surface, an inner bend circumference of curvature and an outer bend circumference, and an inlet end and an outlet end, said pipe segment having an integrally molded support flange extending from the outer surface near the center of the body portion, along the outer bend circumference.
    Type: Grant
    Filed: March 15, 1996
    Date of Patent: October 3, 2000
    Assignee: Silicon Carbide Products, Inc.
    Inventors: Mark L. Witmer, Martin R. Metzger