Patents by Inventor Leonard D. Rontanini

Leonard D. Rontanini 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).

  • Cordierite material useful in a heat source retainer and process for making the same
    Patent number: 4973566
    Abstract: A porous cordierite ceramic and a process for making the same are provided by the present invention. Preferably, the ceramic material includes at least about 95 percent cordierite in the crystal phase, a porosity of at least about 30 volume percent, a crush load strength of at least about 6 pounds, and a thermal conductivity of less than about 5 watts/meter-.degree.K. The method of producing a porous cordierite ceramic includes (a) combining alumina, clay, talc, a pore-forming material and preferably free silica; (b) adding binder, water and other additives; and (c) shaping the mixture to form a green body. The green body is thereafter fired to form a sintered ceramic body. The porous cordierite is useful in a heat source retainer.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: November 27, 1990
    Assignee: Coors Ceramics Company
    Inventors: Michael J. Readey, Leonard D. Rontanini