Patents by Inventor Minharu Kanaya

Minharu Kanaya 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).

  • Black ink composition
    Patent number: 9303174
    Abstract: Provided is a black ink composition containing a pigment, wherein the value calculated from the average particle diameter and the particle size distribution width of the pigment and the ink viscosity is regulated within a certain range, and the number of coarse particles contained in the ink composition is regulated to a certain value or less. The ink composition is excellent in ink storage stability and can give an image realized with good balance between color development, in particular, in high-speed printing and inhibition of a time-dependent change in printing density due to pigment sedimentation.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: April 5, 2016
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Chie Maruyama, Minharu Kanaya
  • BLACK INK COMPOSITION
    Publication number: 20150097893
    Abstract: Provided is a black ink composition containing a pigment, wherein the value calculated from the average particle diameter and the particle size distribution width of the pigment and the ink viscosity is regulated within a certain range, and the number of coarse particles contained in the ink composition is regulated to a certain value or less. The ink composition is excellent in ink storage stability and can give an image realized with good balance between color development, in particular, in high-speed printing and inhibition of a time-dependent change in printing density due to pigment sedimentation.
    Type: Application
    Filed: December 15, 2014
    Publication date: April 9, 2015
    Applicant: Seiko Epson Corporation
    Inventors: Chie Maruyama, Minharu Kanaya