Patents by Inventor Michel Marchais

Michel Marchais 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).

  • Preparing refractory insulating products having controlled porosity by the wet method
    Patent number: 4309371
    Abstract: Process for preparing, by the wet method, refractory insulating products, comprising mixing a refractory aluminous cement, a refractory aggregate, and aluminous fibers, making a stable emulsion in water of said mixture, molding and drying the product, and firing the molded product at a temperature lower than its sintering temperature.
    Type: Grant
    Filed: July 9, 1980
    Date of Patent: January 5, 1982
    Assignee: Groupement pour les Activities Atomiques et Advancees
    Inventors: Jean Daviot, Michel Marchais
  • Refractory insulating products having controlled porosity and the preparing thereof by the wet method
    Patent number: 4142908
    Abstract: Refractory insulating products having controlled porosity, a high resistance to thermal shock, erosion and corrosion by liquid metals such as aluminium, obtained by the wet method, containing (a) an aluminous cement (b) a refractory aggregate, and (c) more than 10% by weight, in relation to the refractory aggregate, of polycrystalline ceramic fibers with at least 70% alumina and at most 30% silica.
    Type: Grant
    Filed: February 27, 1978
    Date of Patent: March 6, 1979
    Assignee: Groupement pour les Activites Atomiques et Avancees
    Inventors: Jean Daviot, Michel Marchais
  • Isotropic composite ceramic with dispersed fibers and process for manufacture thereof
    Patent number: 3999998
    Abstract: Compound isotropic ceramic substance having ceramic fibers dispersed in a proportion greater than 20% by weight of the total weight of the final product, having excellent resistance to thermal shocks. The ceramic substance is constituted by ceramic fibers with calcium aluminate fulfilling the function of a hydraulic binding agent. The dispersing of the fibers in the binding agent may be obtained either in contact with a weight of water of the order of the weight of solid ingredients or dry, with water then being incorporated in a subsequent stage of the manufacturing process.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: December 28, 1976
    Assignee: Groupement pour les Activities Atomiques et Advancees "GAAA"
    Inventors: Henri Carbonnel, Michel Marchais