Patents by Inventor Francois Ledru

Francois Ledru 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).

  • High temperature thermal insulation material and method for making same
    Patent number: 4321154
    Abstract: A thermal insulation material at high temperature comprising insulating mineral fibres bonded in a matrix, wherein the mineral fibres have a melting point higher than 1.000.degree. C. and represent 15 to 60% of the weight of the material, and wherein the matrix is formed, at least in part, by pyrolytic carbon which represents 18 to 40% of the weight of the material. A method for making such a material comprises dispersing a carbon-containing material such as a resin made of fibrous reinforcement, shaping by moulding the mixture thus obtained and pyrolysis of the carbon-containing material.
    Type: Grant
    Filed: July 14, 1980
    Date of Patent: March 23, 1982
    Assignee: Societe Europeene de Propulsion
    Inventor: Francois Ledru