Patents by Inventor R. D. Maier

R. D. Maier 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).

  • Patent number: 5207263
    Abstract: A method for preparing vapor-liquid-solid silicon carbide whisker reinforced metal matrix composites by a squeeze casting process employing a primary pressure and then a hydrostatic pressure to form the reinforced composites. The process to make the composites comprises: 1) providing VLS silicon carbide whiskers in a mold cavity; 2) introducing a molten metal into the mold cavity; 3) subjecting the molten metal and VLS silicon carbide whiskers in the cavity to a primary pressure of about 100 psi to about 2000 psi to infiltrate the whiskers with the molten metal; 4) subsequently subjecting the VLS silicon carbide whiskers infiltrated with the molten metal to a hydrostatic pressure of about 10,000 psi to about 25,000 psi to produce a fully dense mass; and 5) solidifying the metal matrix to form a composite.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: May 4, 1993
    Assignee: BP America Inc.
    Inventors: R. D. Maier, T. W. Krucek