Patents by Inventor Franck Lestournelle

Franck Lestournelle 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).

  • Patent number: 10845625
    Abstract: The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 4, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, and blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face. This optical article can be used to protect the eyes of a user from phototoxic blue light.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: November 24, 2020
    Assignee: Essilor International
    Inventors: Aude Carrega, Armel Jimenez, Franck Lestournelle, Amélie Kudla
  • Publication number: 20180321514
    Abstract: The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 7, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face, and having a mean reflection factor Ruv on said rear main face between 280 nm and 380 nm, weighted by the function W(?) defined in the ISO 13666:1998 standard, lower than 7%, for both an angle of incidence of 30° and for an angle of incidence of 45°. This optical article can be used to protect the eyes of a user from phototoxic blue light and UV light.
    Type: Application
    Filed: November 6, 2015
    Publication date: November 8, 2018
    Inventors: Aude Carrega, Armel Jimenez, Franck Lestournelle, Amélie Kudla
  • Publication number: 20180321513
    Abstract: The present invention relates to an optical article comprising a substrate with a front main face and a rear main face, having a colorimetric coefficient b* as defined in the CIE (1976) L*a*b* international colorimetric system that is lower than or equal to 4, a relative light transmission factor in the visible spectrum Tv higher than or equal to 87%, and blocking at least 8% of light having a wavelength ranging from 420 to 450 nm arriving on said front main face. This optical article can be used to protect the eyes of a user from phototoxic blue light.
    Type: Application
    Filed: November 6, 2015
    Publication date: November 8, 2018
    Inventors: Aude Carrega, Armel Jimenez, Franck Lestournelle, Amélie Kudla