Patents by Inventor Rieko Hata

Rieko Hata 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).

  • Optical recording medium
    Patent number: 6794114
    Abstract: The object of the present invention is to provide an optical recording medium which is excellent in the recording sensitivity and suitable for the high speed recording. Thus, the present invention is an optical recording medium comprising a substrate and a laser-writable and readable recording layer provided thereon, wherein said recording layer contains a chelate dye comprising two or more azo compounds having different structures and a divalent or more metal ion, and said azo compounds are a selected from azo compounds represented by the following general formula (I) and the general formula (II).
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: September 21, 2004
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Hisashi Shoda, Rieko Hata, Satoru Imamura
  • Optical recording medium
    Publication number: 20020051941
    Abstract: The object of the present invention is to provide an optical recording medium which is excellent in the recording sensitivity and suitable for the high speed recording.
    Type: Application
    Filed: December 17, 2001
    Publication date: May 2, 2002
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Hisashi Shoda, Rieko Hata, Satoru Imamura