Patents by Inventor Stefan Hari

Stefan Hari 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: 4081439
    Abstract: Disazo pigments of the formula ##STR1## WHEREIN X and Y denote hydrogen or halogen atoms, alkyl or alkoxy groups containing 1-6 carbon atoms, or aryloxy, trifluoromethyl, nitro, cyano or carboxylic acid ester groups, or wherein X and Y conjointly denote a fused benzene ring are useful for coloring plastics, lacquers and printing inks in yellow shades.
    Type: Grant
    Filed: August 25, 1976
    Date of Patent: March 28, 1978
    Assignee: Ciba-Geigy Corporation
    Inventors: Stefan Hari, Karl Ronco
  • Patent number: 4062838
    Abstract: Disazo pigments of the formula ##STR1## wherein A denotes a phenylene or naphthylene radical, R denotes an aryl, alkyl or alkenyl group optionally substituted by halogen atoms, by hydroxyl, alkoxy or alkylmercapto groups containing 1-6 C atoms, by alkoxycarbonyl groups containing 2-6 C atoms or cyano, aryl, aryloxy, arylmercapto or heterocyclic radicals, or denotes a heterocyclic radical, and the X and Y denote H atoms or substituents which do not confer solubility in water are useful for coloring plastics lacquers and printing inks in yellow to orange shade of good fastness properties.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: December 13, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Georg Cseh, Stefan Hari
  • Patent number: 4044036
    Abstract: 1:1 metal complexes of bis-azomethines of the formula ##STR1## wherein R denotes an alkylene radical which contains 2-8 C atoms and is optionally interrupted by hetero-atoms, X denotes a H or halogen atom or an alkyl, alkoxy, carboxyl, alkoxy-carbonyl or phenylazo group and Y and Z denote H or halogen atoms, or wherein the substituents Y and Z form a fused benzene ring, if R contains a hetero-atom, Y and Z must not be H atoms, and if R contains 2 C atoms, X, Y and Z must not be H atoms, and a metal are valuable pigments coloring plastics and printing inks in fast yellow to range shades.
    Type: Grant
    Filed: September 9, 1974
    Date of Patent: August 23, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Stefan Hari, Alexander McHugh Irvine, James McGeachie McCrae, Laurent Vuitel, Francois L'Eplattenier
  • Patent number: 4031073
    Abstract: Monoazo pigments of the formula ##STR1## wherein R.sub.1 denotes a H atom, an alkyl group containing 1-4 C atoms or an aryl radical, R.sub.2 denotes a H atom, an alkyl group containing 1-4 C atoms, or an aralkyl or aryl radical, or wherein the radicals R.sub.1 and R.sub.2, conjointly with the N atom, form a heterocyclic 5-membered or 6-membered ring, R.sub.3 denotes an H atom or halogen atom or an alkyl group containing 1-4 C atoms, R.sub.4 and R.sub.5 denote H atoms, alkyl groups containing 1-4 C atoms or phenyl groups optionally substituted by halogen atoms and alkyl and alkoxy groups containing 1-4 C atoms, X denotes an O atom or an imino group, Y denotes an O atom or S atom or an imino group, and Z denotes a halogen atom, an alkyl or alkoxy group containing 1-4 C atoms, or an aryloxy group, and wherein the carbonamide group is located in the m- or p-position to the azo group are prepared.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: June 21, 1977
    Assignee: Ciba-Geigy Corporation
    Inventors: Rudolf Mory, Stefan Hari
  • Patent number: 3956266
    Abstract: New diazo pigments of the formula ##EQU1## wherein A denotes a phenylene or naphthylene radical and R denotes an aromatic radical containing a --CONH-- group bonded in a cyclic structure are prepared. The pigments are useful for coloring high-molecular organic materials such as polyamides, polyurethanes or polyesters. The pigments have good fastness to light, migration and weathering.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: May 11, 1976
    Assignee: Ciba-Geigy Corporation
    Inventors: Rudolf Mory, Stefan Hari