Patents by Inventor Roger Tetaz

Roger Tetaz 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).

  • Method and apparatus for measurement of stress in float glass
    Patent number: 4619681
    Abstract: The invention relates to the measurement of stresses in float glass. In a process, the stresses in the glass are continuously determined by scanning the glass over its entire width and simultaneously measuring the temperature of the glass at each location scanned. A measurement of double refraction representing stresses is combined with the temperature measurement to establish values of the permanent stresses in the glass. The invention includes apparatus for carrying out the process.
    Type: Grant
    Filed: April 17, 1985
    Date of Patent: October 28, 1986
    Assignee: Saint-Gobain Recherche
    Inventors: Roger Tetaz, Philippe Vizet