Patents by Inventor Thierry Druzkowski

Thierry Druzkowski 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).

  • Process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts
    Patent number: 6683203
    Abstract: This process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the formula (I), by reaction, in the presence of water, of N,N-dimethylaminoethyl acrylate (DAMEA) with a quaternizing agent of formula (II), is characterized in that the said reaction is carried out continuously in a rotating disc agitated column, with introduction of the quaternizing agent in the column bottom and introduction of the DAMEA and the water in the column top, the said reaction being carried out at a temperature of 35 to 60° C. and under a pressure of 10 to 20 bar.  R—Cl  (II) R=methyl or benzyl radical.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: January 27, 2004
    Assignee: Atofina
    Inventors: Thierry Druzkowski, Gilles Herbst, Serge Tretjak, Alain Riondel
  • Process for the manufacture of aqueous solutions of unsaturated quaternary ammonium salts
    Publication number: 20030023113
    Abstract: This process for the manufacture of an aqueous solution of the unsaturated quaternary ammonium salt corresponding to the formula (I), by reaction, in the presence of water, of N,N-dimethylaminoethyl acrylate (DAMEA) with a quaternizing agent of formula (II), is characterized in that the said reaction is carried out continuously in a rotating disc agitated column, with introduction of the quaternizing agent in the column bottom and introduction of the DAMEA and the water in the column top, the said reaction being carried out at a temperature of 35 to 60° C. and under a pressure of 10 to 20 bar.
    Type: Application
    Filed: April 26, 2002
    Publication date: January 30, 2003
    Applicant: ATOFINA
    Inventors: Thierry Druzkowski, Gilles Herbst, Serge Tretjak, Alain Riondel