Patents by Inventor Yves Longevialle

Yves Longevialle 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: 10040731
    Abstract: A composite pyrotechnic product containing energetic charges in a plasticized binder includes a cured energetic polymer and at least one energetic plasticizer, wherein: the cured energetic polymer consists of a glycidyl azide polymer (GAP) having a number average molecular weight (Mn) lying in the range 700 g/mol to 3000 g/mol and cured via its hydroxyl terminal functions with at least one curing agent of polyisocyanate type; and the energetic charges present at a content in the range 50% to 70% by weight consisting, for at least 95% of their weight, of large crystals of ammonium dinitramide (ADN) and of small crystals of hexogen (RDX): the large crystals of ammonium dinitramide (ADN) being present at a content in the range 8% to 65% by weight; and the small crystals of hexogen (RDX) being present at a content in the range 5% to 55% by weight.
    Type: Grant
    Filed: October 27, 2015
    Date of Patent: August 7, 2018
    Assignee: AIRBUS SAFRAN LAUNCHERS SAS
    Inventors: Yves Longevialle, Martine Golfier, Fabienne Morin
  • Publication number: 20170320787
    Abstract: A composite pyrotechnic product containing energetic charges in a plasticized binder includes a cured energetic polymer and at least one energetic plasticizer, wherein: the cured energetic polymer consists of a glycidyl azide polymer (GAP) having a number average molecular weight (Mn) lying in the range 700 g/mol to 3000 g/mol and cured via its hydroxyl terminal functions with at least one curing agent of polyisocyanate type; and the energetic charges present at a content in the range 50% to 70% by weight consisting, for at least 95% of their weight, of large crystals of ammonium dinitramide (ADN) and of small crystals of hexogen (RDX): the large crystals of ammonium dinitramide (ADN) being present at a content in the range 8% to 65% by weight; and the small crystals of hexogen (RDX) being present at a content in the range 5% to 55% by weight.
    Type: Application
    Filed: October 27, 2015
    Publication date: November 9, 2017
    Inventors: Yves LONGEVIALLE, Martine GOLFIER, Fabienne MORIN
  • Patent number: 5639987
    Abstract: The present invention lies in the field of compositions which modify the ballistic properties of solid propellants and in that of the double-base solid propellants containing these compositions. Various lead compounds are known to be effective in this function, but these compounds are toxic; the problem which is solved by the present invention is to replace these lead compounds with nontoxic compounds which furthermore do not impair other properties and the performance values of the propellants. The modifying compounds are chosen from the group consisting of .beta.-resorcylates and .gamma.-resorcylates. The invention also relates to processes for the synthesis of some of these products. Finally, it relates to double-base solid propellants containing these compounds.
    Type: Grant
    Filed: November 29, 1995
    Date of Patent: June 17, 1997
    Assignee: Societe Nationale des Poudres et Explosifs
    Inventors: Gerard Berteleau, Gilles Fonblanc, Yves Longevialle, Mauricette Rat