Patents by Inventor Walter Ehlert

Walter Ehlert 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).

  • Production of porous sintered ceramic material
    Patent number: 4563432
    Abstract: A ceramic, in particular refractory product is provided comprising a matrix material which contains pores and where the pores are obtained by driving off of opening materials. The product is characterized by pores which are of a flattened shape resulting from platelet shape or flake shape voids. The invention further provides a method for the production of the ceramic product, where a platelet shaped opening material is admixed to the ceramic raw material. The resulting products are characterized by advantageous strength and thermal insulation properties.
    Type: Grant
    Filed: October 21, 1983
    Date of Patent: January 7, 1986
    Assignee: Dr. C. Otto & Comp. G.m.b.H.
    Inventors: Walter Ehlert, Karl-Heinz Reuter, Klaus-Jurgen Dietzel