Patents by Inventor Catherine Desvard

Catherine Desvard 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).

  • Composition for checking the functioning of fire detection installations and application to various types of detectors
    Patent number: 4715985
    Abstract: Compositions for checking the functioning of fire detectors comprising at least 75% of at least one haloalkane, up to 15% of at least one volatile organic compound selected from the group consisting of alcohols, oxoderivatives, and ethers, a small amount of an organic compound having a vapor pressure less than 0.1 millibar, and an optional propellant. The composition can be used to check the functioning of ionization detectors, combustible gas detectors, and optical smoke detectors.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: December 29, 1987
    Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes George Claude
    Inventors: Jean-Louis Pean, Catherine Desvard, Jean-Paul Barbier