Patents by Inventor Jean-Roger Desmurs

Jean-Roger Desmurs 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).

  • Chlorination of phenolic compounds
    Patent number: 4855513
    Abstract: The chlorophenols, e.g., 2,4,6-trichlorophenol, are efficiently prepared by chlorinating an ortho-/para-substituted phenolic compound with gaseous chlorine, whether in molten state or in a solvent reaction medium, in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: August 8, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventors: Bernard Besson, Jean-Roger Desmurs, Isabelle Jouve
  • Stabilization of mixtures of chlorination of phenol/chlorophenols
    Patent number: 4853153
    Abstract: Mixtures produced by chlorination of phenol/chlorophenols are effectively stabilized by stirring same in the presence of a stabilizing amount of at least one reducing compound that is a chlorine acceptor.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: August 1, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Roger Desmurs, Serge Ratton
  • Chlorination of nitrophenols
    Patent number: 4827047
    Abstract: The chloronitrophenols, e.g., 2,6-dichloro-4-nitrophenol (a known agrochemical/pharmaceutical intermediate), are efficiently prepared by chlorinating ortho- or para-nitrophenol with gaseous chlorine, characteristically in the molten state, and in the presence of a catalytically effective amount of a primary, secondary or tertiary amine.
    Type: Grant
    Filed: March 7, 1988
    Date of Patent: May 2, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Roger Desmurs, Isabelle Jouve
  • Stabilization of mixtures of chlorination of phenol/chlorophenols
    Patent number: 4822922
    Abstract: Mixtures produced by chlorination of phenol/chlorophenols are effectively stabilized by stirring same in the presence of a stabilizing amount of at least one strong protonic acid and/or a Lewis acid.
    Type: Grant
    Filed: September 25, 1987
    Date of Patent: April 18, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Roger Desmurs, Serge Ratton
  • Trapping tube adapted to be fitted at the outlet of a gas chromatograph and device for supporting and presenting such a tube
    Patent number: 4756725
    Abstract: This invention relates to a trapping tube characterized in that it is constituted by a shaped tube comprising:a first section or zone of condensation of the separated gaseous phase delivered by the outlet of the chromatograph,a second section or zone of confinement of the condensate of the separated gaseous phase,and a third section or zone of evacuation of the vector gas of the separated gaseous phase. The invention is more particularly applicable to the obtaining of condensates in a small, even infinite quantity.
    Type: Grant
    Filed: August 27, 1986
    Date of Patent: July 12, 1988
    Assignee: Rhone-Poulenc Recherches
    Inventors: Jean-Paul Badey, Jean-Roger Desmurs, Michel Dumont