Patents by Inventor Ayako Hohsaka

Ayako Hohsaka 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).

  • Cyanine dyes
    Publication number: 20040161701
    Abstract: Disclosed are novel trimethine cyanine dyes, light absorbents, light-resistant improvers, and optical recording media which comprise the trimethine cyanine dyes. The cyanine dyes exert satisfactory solubility and heat resistance when used in high-density optical recording media.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 19, 2004
    Applicant: KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENYUJO
    Inventors: Ayako Hohsaka, Dai Matsuura, Toshio Kawata, Shigeo Yasui
  • Cyanine dyes
    Patent number: 6743568
    Abstract: Optical recording media using mixtures of benzoindolenic trimethine cyanine dyes, where the first benzoindolenic trimethine cyanine dye bears a heterocyclic azo dye metal complex as the counterion and the second benzoindolenic trimethine cyanine dye has a different type of counterion. This combination of these benzoindolenic trimethine cyanine dyes coated on a substrate results in high density media, where the dyes have a high solubility and heat resistance.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: June 1, 2004
    Assignee: Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo
    Inventors: Ayako Hohsaka, Dai Matsuura, Toshio Kawata, Shigeo Yasui
  • Cyanine dyes
    Publication number: 20010044074
    Abstract: Disclosed are novel trimethine cyanine dyes, light absorbents, light-resistant improvers, and optical recording media which comprise the trimethine cyanine dyes. The cyanine dyes exert satisfactory solubility and heat resistance when used in high-density optical recording media.
    Type: Application
    Filed: February 12, 2001
    Publication date: November 22, 2001
    Inventors: Ayako Hohsaka, Dai Matsuura, Toshio kawata, Shigeo Yasui