Patents by Inventor Kunji Kitamura

Kunji Kitamura 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).

  • Yellow pigment composition for image recording and process for producing the same
    Patent number: 6960252
    Abstract: Monoazo based yellow pigment compositions for image recording that are suitable as a well-balanced yellow coloring agent for image recording with favorable reproducibility of images and image retaining capacity, which is inexpensive and excellent in safety are provided. Provided is a yellow pigment composition for image recording which includes a monoazo yellow base pigment represented by the general formula (1): and a particular disazo yellow pigment having a sulfonic acid group and/or a particular monoazo yellow pigment.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: November 1, 2005
    Assignee: Sanyo Color Works, Ltd.
    Inventors: Koichi Takahara, Kensuke Misono, Hidehiro Tamatome, Junichiro Sato, Kunji Kitamura
  • Yellow pigment composition for image recording and process for producing the same
    Publication number: 20040138434
    Abstract: Monoazo based yellow pigment compositions for image recording that are suitable as a well-balanced yellow coloring agent for image recording with favorable reproducibility of images and image retaining capacity, which is inexpensive and excellent in safety are provided.
    Type: Application
    Filed: November 25, 2003
    Publication date: July 15, 2004
    Applicant: SANYO COLOR WORKS, LTD.
    Inventors: Koichi Takahara, Kensuke Misono, Hidehiro Tamatome, Junichiro Sato, Kunji Kitamura