Patents by Inventor Pierre Letourneur

Pierre Letourneur 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).

  • Glass for panoramic roof
    Patent number: 4634231
    Abstract: A glass sheet suitable for use as the panoramic roof of a motor vehicle is disclosed, the sheet being comprised of a tinted glass coated with a network of enamel patterns which reduce the light and energy transmission factor of the formed glass. The glass may optionally include a thin semireflective layer deposited on one side of the glass. Preferably, the light transmission factor and energy transmission factor of the coated glass sheet are approximately equal, and below 30%.
    Type: Grant
    Filed: March 21, 1984
    Date of Patent: January 6, 1987
    Assignee: Saint-Gobain Vitrage
    Inventors: Denis Poncelet, Jean-Claude Coulon, Jacques Chaumette, Pierre Letourneur
  • Method for casting vitreous materials using the lost wax process
    Patent number: 4115504
    Abstract: A method for casting vitreous materials using the lost wax process in which a pattern of the article to be cast is formed with a substance which is vaporized at the casting temperature of the vitreous material. The pattern is embedded in a heat resistant silica compound such as sand which surrounds the pattern to form a casting mold. The sand is contained in a receptacle called a casting shell. The vitreous material is heated to a temperature at which its viscosity is between 20 and 100 poises and the article is cast.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: September 19, 1978
    Assignee: Compagnie Internationale de Minerallurgie-CIM
    Inventors: Jean Dewitte, Pierre Letourneur