Patents by Inventor Remy Jeanneret

Remy Jeanneret 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).

  • Dithioketo pyrrolopyrroles
    Patent number: 4760151
    Abstract: Compounds of formula (1) ##STR1## wherein A and B are identical or different alkyl, aralkyl or cycloalkyl groups or carbocyclic or heterocyclic aromatic radicals, R.sub.1 and R.sub.2 are hydrogen atoms or substituents which do not impart solubility in water, are particularly suitable as photoconductive substances.
    Type: Grant
    Filed: August 29, 1986
    Date of Patent: July 26, 1988
    Assignee: Ciba-Geigy Corporation
    Inventors: Alain C. Rochat, Abul Iqbal, Remy Jeanneret, Jin Mizuguchi
  • Electrophotographic recording material containing selected dithioke topyrrolopyrroles
    Patent number: 4632893
    Abstract: Compounds of formula (1) ##STR1## wherein A and B are identical or different alkyl, aralkyl or cycloalkyl groups or carbocyclic or heterocyclic aromatic radicals, R.sub.1 and R.sub.2 are hydrogen atoms or substituents which do not impart solubility in water, are particularly suitable as photoconductive substances.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: December 30, 1986
    Assignee: CIBA-GEIGY Corporation
    Inventors: Alain C. Rochat, Abul Iqbal, Remy Jeanneret, Jin Mizuguchi
  • Electrophotographic imaging process using anthraquinoid black pigments or metal complexes
    Patent number: 4191566
    Abstract: An electrophotographic imaging process, wherein the electrically photosensitive particles for the image reproduction consist of a black pigment selected from the series of the anthraquinoid pigments which contain at least 2 anthraquinone radicals or at least 6 condensed rings, of the perylenetetracarboxylic diimides or of the metal complexes of the formula ##STR1## wherein A represents a nitrogen atom or the ##STR2## X represents a hydrogen or halogen atom or an alkyl group of 1 to 6 carbon atoms,Y represents a hydrogen or halogen atom, an alkyl, alkoxy or alkylsulphonyl group of 1 to 6 carbon atoms, a nitro or carbamoyl group, an alkylcarbamoyl or alkoxycarbonyl group of 2 to 6 carbon atoms or an arylcarbamoyl or aryloxycarbonyl group of 7 to 11 carbon atoms.
    Type: Grant
    Filed: January 31, 1978
    Date of Patent: March 4, 1980
    Assignee: Ciba-Geigy Corporation
    Inventors: Remy Jeanneret, Gunther Zwahlen, Christoph Frey, Georgios Zographos
  • Stable, concentrated dispersions of basic dyestuffs
    Patent number: 4150947
    Abstract: The invention relates to a dispersion of a water-soluble basic dyestuff in an organic solvent that is at least partially miscible with water or in a mixture of such a solvent with water.
    Type: Grant
    Filed: June 11, 1976
    Date of Patent: April 24, 1979
    Assignee: Ciba-Geigy AG
    Inventors: Walter Lang, Remy Jeanneret, Anton Kaiser