Patents by Inventor Daniel Brun

Daniel Brun 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).

  • Preparation of L-aspartic acid
    Patent number: 5488155
    Abstract: L-aspartic acid is improvedly prepared in high yields by treating ammonium aspartate, advantageously in aqueous reaction medium, with an effective, aspartic acid-precipitating amount of fumaric acid.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: January 30, 1996
    Assignee: Rhone-Poulenc Chimie
    Inventors: Daniel Brun, Pierre-Yves Lahary, Jean-Francois Thierry
  • Preparation of maleamic acid
    Patent number: 5399750
    Abstract: Maleamic acid (aminomaleic acid) is improvedly prepared by reacting gaseous ammonia with molten maleic anhydride under reactant contact conditions of high surface area, for example reacting said gaseous NH.sub.3 with a thin film of said molten maleic anhydride or with said molten maleic anhydride in a state of vigorous agitation.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: March 21, 1995
    Assignee: Rhone-Poulenc Chimie
    Inventors: Daniel Brun, Pierre-Yves Lahary