Patents by Inventor John H. Coy

John H. Coy 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).

  • Production of pigments
    Patent number: 4469515
    Abstract: A process for producing monoazo or disazo pigments, which process comprises:(a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and(b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments.Compared with products produced by conventional methods, the pigments produced in the manner described above have a greater coloring strength, improved transparency, improved flow properties, and a higher degree of dispersibility.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: September 4, 1984
    Assignee: Ciba-Geigy Corporation
    Inventors: David T. Pechey, John H. Coy
  • Production of pigments
    Patent number: 4341701
    Abstract: A process for producing monoazo or disazo pigments, which process comprises:(a) adding to a solution of a diazonium and/or tetrazonium salt of an aromatic or heterocyclic amine a solution or suspension containing 0.1-50% by weight of the theoretically required total weight of one or more coupling components, and(b) using the product from step (a) as an additive in the production of a monoazo pigment, a disazo pigment or a mixture of monoazo and disazo pigments.Compared with products produced by conventional methods, the pigments produced in the manner described above have a greater coloring strength, improved transparency, improved flow properties, and a higher degree of dispersibility.
    Type: Grant
    Filed: November 4, 1980
    Date of Patent: July 27, 1982
    Assignee: Ciba-Geigy Corporation
    Inventors: David T. Pechey, John H. Coy