Patents by Inventor Hiroki Nishina

Hiroki Nishina 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).

  • Aqueous pigment paste for offset ink, process for producing the paste, and use thereof
    Patent number: 5882394
    Abstract: The present invention relates to a aqueous pigment paste for an offset ink, which paste is suitable for producing an offset ink by a flushing method, a process for the production of the aqueous pigment paste, and an offset ink obtained by a flushing method. The aqueous pigment paste for an offset ink contains a lake pigment of an azo dye obtained by coupling a diazonium salt of an aromatic amine having a soluble group and a coupler component, 3 to 15% by weight, based on the azo dye, of a rosin, 1 to 20% by weight, based on the azo dye, of a vehicle for an offset ink, the total amount of the lake pigment, the rosin and the vehicle being 10 to 40% by weight, and 60 to 90% by weight of water.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: March 16, 1999
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Hitoshi Sugamo, Hiroki Nishina, Seiji Aida