Patents by Inventor Alain G. de l'Eprevier

Alain G. de l'Eprevier 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).

  • Process for the manufacture of a rigid insulating refractory material and material thus obtained
    Patent number: 5252357
    Abstract: A process for manufacturing a refractory material adapted for contact with a molten ferrous metal, comprising the steps of: impregnating the base refractory material with a zirconium containing solution, the base refractor material having a porosity of not less than 85% and not more than 95%, drying the impregnated base refractory material at a temperature of 800.degree.-900.degree. C. for two to six hours to form a zirconia protective layer covering walls of pores in the base refractory material.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: October 12, 1993
    Assignee: Produits Cellulosiques Isolants-Procelis
    Inventor: Alain G. De L'Eprevier
  • Insulating piece in different shapes, formed by stacked layers of fibers capable of withstanding high temperatures, and manufacturing process
    Patent number: 4677018
    Abstract: An insulating structure is provided which includes a succession of superposed layers of fibers capable of withstanding high temperatures. A hot face of the structure comprises fibers capable of withstanding temperatures higher than the fibers of the cold face. The layers have an apparent density which varies from the hot face to the cold face. The structure contains fibers which have temperature-resistant properties which progressively decrease from the hot face to the cold face. The structure according to this invention can advantageously be applied to line ovens.
    Type: Grant
    Filed: October 17, 1985
    Date of Patent: June 30, 1987
    Assignee: Produits Cellulosiques Isolants-Procelis
    Inventors: Alain G. de l'Eprevier, Albert Garnier
  • Ceramic composite material having a core of ceramic fibers coated with a layer of ceramic, and method of producing same
    Patent number: 4671911
    Abstract: Ceramic composite material characterized in that it comprises a core of ceramic fibers of which at least one face is coated with a hard and dense ceramic slip covering, of which the coefficient of expansion is compatible with that of the ceramic fibers.
    Type: Grant
    Filed: May 10, 1985
    Date of Patent: June 9, 1987
    Assignee: Produits Cellulosiques Isolants-Procelis
    Inventors: Albert Garnier, Alain G. de l'Eprevier