Patents by Inventor Didier Lauranson

Didier Lauranson 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).

  • Bituminous emulsions, their method of preparation and their use for the production of materials and road pavements
    Patent number: 7510606
    Abstract: The present invention relates to bitumen emulsions that can be used in roadmaking applications for the production of cold mixes, emulsion-stabilized gravel and road pavements obtained at ambient temperature, the cohesion of which at young age is substantially improved over the cold mixes, emulsion-stabilized gravel and road pavements of the prior art. These bituminous emulsions are characterized by a median diameter of 0.6 ?m or less, and preferably 0.5 ?m or less.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: March 31, 2009
    Assignee: CECA S.A.
    Inventors: Maurice Bourrel, Eric Jorda, Didier Lauranson, Francis Verzaro
  • Bituminous emulsions, their method of preparation and their use for the production of materials and road pavements
    Publication number: 20060086288
    Abstract: The present invention relates to bitumen emulsions that can be used in roadmaking applications for the production of cold mixes, emulsion-stabilized gravel and road pavements obtained at ambient temperature, the cohesion of which at young age is substantially improved over the cold mixes, emulsion-stabilized gravel and road pavements of the prior art. These bituminous emulsions are characterized by a median diameter of 0.6 ?m or less, and preferably 0.5 ?m or less.
    Type: Application
    Filed: October 18, 2005
    Publication date: April 27, 2006
    Inventors: Maurice Bourrel, Eric Jorda, Didier Lauranson, Francis Verzaro
  • Desalination of aqueous sulphonamide solutions
    Patent number: 6036830
    Abstract: In order to remove the salts (in particular NH.sub.4 Cl) present in an aqueous sulphonamide solution (in particular CH.sub.3 SO.sub.2 NH.sub.2), the solution is subjected to a two-compartment electrodialysis. By maintaining the pH at a value below 7, the formation of ammonia is avoided. The demineralized solution can be concentrated in order to receover after crystallization, the sulphonamide.
    Type: Grant
    Filed: October 14, 1998
    Date of Patent: March 14, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Christian Gancet, Didier Lauranson, Frederic Perie