Patents by Inventor André Samat

André Samat 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).

  • Photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained
    Patent number: 6281366
    Abstract: The present invention relates to photochromic [3H]naphtho[2,1-b]pyran compounds containing an acetylenic substituent, process for their manufacture, and photochromic materials and articles obtained therefrom. The invention, in some specific aspects, relates to photochromic compounds having a [3H]naphtho-[2,1-b]pyran structure and bearing an acetylenic group in one of the positions 7 to 10 of the naphthopyran ring structure.
    Type: Grant
    Filed: February 29, 2000
    Date of Patent: August 28, 2001
    Assignee: Essilor International Compagnie Generale d'Optique
    Inventors: Michel Frigoli, Corinne Moustrou, André Samat, Robert Guglielmetti