Patents by Inventor Kazumasa Tomura

Kazumasa Tomura 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).

  • Nonaqueous ink composition for ink jet recording and ink jet recording method using nonaqueous ink composition
    Patent number: 9206327
    Abstract: A nonaqueous ink composition for ink jet recording contains a glitter pigment and a solvent represented by the following formula: wherein R1 represents an alkyl group containing one to eight carbon atoms and R2 and R3 represent a methyl group or an ethyl group.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: December 8, 2015
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Ito Maki, Akihito Sao, Kazumasa Tomura, Kenichiro Kubota
  • Ink for ink jet recording and ink set for ink jet recording
    Patent number: 8697774
    Abstract: The ink for ink jet recording includes a sparingly water-soluble alkanediol, a resin, and a coloring material, wherein the content of the coloring material is from 1 to 3% by mass based on the total mass of the ink, the surface tension is from 21 to 25 mN/m, and the thixotropic index (TI) represented by the following formula (1), as determined at a time point when its content becomes 40% by mass based on the total mass before the evaporation of the ink by the evaporation of the ink, is from 2 to 110: TI=?(1 s?1)/?(1000 s?1)??(1).
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: April 15, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Kazumasa Tomura, Akira Mizutana, Shinichi Yamamoto
  • NONAQUEOUS INK COMPOSITION FOR INK JET RECORDING AND INK JET RECORDING METHOD USING NONAQUEOUS INK COMPOSITION
    Publication number: 20120249666
    Abstract: A nonaqueous ink composition for ink jet recording contains a glitter pigment and a solvent represented by the following formula: wherein R1 represents an alkyl group containing one to eight carbon atoms and R2 and R3 represent a methyl group or an ethyl group.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 4, 2012
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Ito Maki, Akihito Sao, Kazumasa Tomura, Kenichiro Kubota
  • INK FOR INK JET RECORDING AND INK SET FOR INK JET RECORDING
    Publication number: 20120232203
    Abstract: The ink for ink jet recording includes a sparingly water-soluble alkanediol, a resin, and a coloring material, wherein the content of the coloring material is from 1 to 3% by mass based on the total mass of the ink, the surface tension is from 21 to 25 mN/m, and the thixotropic index (TI) represented by the following formula (1), as determined at a time point when its content becomes 40% by mass based on the total mass before the evaporation of the ink by the evaporation of the ink, is from 2 to 110: TI=?(1 s?1)/?(1000 s?1)??(1).
    Type: Application
    Filed: March 7, 2012
    Publication date: September 13, 2012
    Applicant: Seiko Epson Corporation
    Inventors: Kazumasa Tomura, Akira Mizutani, Shinichi Yamamoto