Patents by Inventor Jean-Claude Henri Raoul Hardouin

Jean-Claude Henri Raoul Hardouin 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: 4076713
    Abstract: A process for the preparation of a vat dye of the dianthraquinone-azine or dianthraquinone-N,N'-dihydroazine series, or a higher cyclic homologue thereof, which comprises reacting a primary amine selected from the group consisting of amino anthraquinones, their substitution products and higher cyclic homologues, with an alkaline condensing agent, wherein reaction is effected in the presence of at least one oxide of an organic derivative of a metalloid element of Group 5B of the Periodic Classification of the elements.
    Type: Grant
    Filed: June 16, 1975
    Date of Patent: February 28, 1978
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Jean Claude Henri Raoul Hardouin, Maurice Rene Jean Vallette
  • Patent number: 3985570
    Abstract: The preparation of pigment compositions with a copper phthalocyanine base, stable to crystallization is described.There is incorporated in the copper phthalocyanine pigments to be stabilized a compound of the general formula: ##SPC1##Wherein Pc represents a phthalocyanine residue, moiety or radical, X represents oxygen or sulfur or --NH-- bridge, R.sub.1 represents halogen or alkoxy, trifluoromethyl, trifluoromethoxy, cyano, carboxy, nitro, N-alkylamino or N,N-dialkylamino, R.sub.2 represents hydrogen, or alkyl or alkoxy group, R.sub.3 represents hydrogen or alkyl, n is a number from 1 to 8, R.sub.1, R.sub.2 and R.sub.3 may occupy the ortho, meta or para positions of the benzene ring.The pigment compositions according to the invention are particularly well suited for the coloring of printed inks.
    Type: Grant
    Filed: July 15, 1975
    Date of Patent: October 12, 1976
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Louis Antoine Cabut, Jean-Claude Henri Raoul Hardouin, Michel Ernest Antoine Huille, Daniel Francois Xavier Pigasse
  • Patent number: 3960952
    Abstract: Process for the preparation of an anhydrous base or salt of a dyestuff of the Auramine series, which comprises isolating the base or salt in acetone, methylethylketone or diethylketone; products prepared by such a process; the hydrofluoride of the base of Auramine O; the phosphate of the base of Auramine O; the hydrobromide of the base of ethylauramine; the phosphate of the base of ethylauramine; the hydrofluoride and phosphate of the base of Auramine G and paper, inks, textile fibers, leather or plastics materials colored by the hydrofluoride of the base of Auramine O; the phosphate of the base of Auramine O; the hydrobromide of the base of ethylauramine; the phosphate of the base of ethylauramine.
    Type: Grant
    Filed: August 6, 1974
    Date of Patent: June 1, 1976
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Jean-Claude Henri Raoul Hardouin, Maurice Rene Jean Vallette
  • Patent number: 3954864
    Abstract: A concentrated phosphate solution of the base of a dyestuff of the Auramine series in a hydrophilic solvent (I), which solution is stable to storage and anhydrous; processes for the preparation of such a solution and use of such a solution for colouring paper or inks for flexography.
    Type: Grant
    Filed: August 6, 1974
    Date of Patent: May 4, 1976
    Assignee: Produits Chimiques Ugine Kuhlmann
    Inventors: Jean-Claude Henri Raoul Hardouin, Maurice Rene Jean Vallette