Patents by Inventor Jean-Pierre Levy

Jean-Pierre Levy 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).

  • 2-amino-5-nitropyridinium halide crystal structure and process for the preparation of said crystal structures
    Patent number: 5637717
    Abstract: The present invention relates to new noncentrosymmetric crystal structures consisting of an optionally substituted 2-amino-5-nitropyridinium halide.It also relates to a process for the preparation of these crystal structures. Finally, it relates to a device with an electro-optical effect comprising said crystal structure.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 10, 1997
    Assignees: France Telecom, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jacques Pecaut, Jean-Pierre Levy, Rene Masse, Joseph Zyss, Rolland Hierle
  • 5-amino-5-nitropyridinium halide crystal structure
    Patent number: 5514807
    Abstract: The present invention relates to new noncentrosymmetric crystal structures consisting of an optionally substituted 2-amino-5-nitropyridinium halide.It also relates to a process for the preparation of these crystal structures. Finally, it relates to a device with an electro-optical effect comprising said crystal structure.
    Type: Grant
    Filed: April 6, 1994
    Date of Patent: May 7, 1996
    Assignees: France Telecom, Centre Nationale de la Recherche Scientifique (CNRS)
    Inventors: Jacques Pecaut, Jean-Pierre Levy, Rene Masses, Joseph Zyss, Rolland Hierle
  • Monohydrogentartrate crystalline structure having nonlinear quadratic effects
    Patent number: 5374734
    Abstract: The present invention relates to new left-handed or right-handed monohydrogentartrate crystalline structures having nonlinear quadratic effects and a wide transparency range extending from the visible to the near infrared, consisting of optionally substituted 2-amino-5-nitropyridinium cations in combination with a polyanionic organic matrix formed of left-handed or right-handed monohydrogentartrate anions.It also relates to a process for the preparation of these crystalline structures consisting in mixing one mole of cation base with at least two moles of left-handed and/or right-handed tartaric acid. It finally relates to a device having an electrooptical effect containing said crystalline structure.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: December 20, 1994
    Assignees: France Telecom, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Joseph Zyss, Roland Hierle, Rene Masse, Jean-Pierre Levy