Patents by Inventor Yuuhei Shimizu

Yuuhei Shimizu 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).

  • Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
    Patent number: 8273168
    Abstract: An ink contains at least a pigment, wherein the pigment is a solid solution of C.I. Pigment Red 202 and C.I. Pigment Violet 19, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95?(=<)D50?(=<)130, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5?(=<)D90/D50?(=<)2.2.
    Type: Grant
    Filed: February 4, 2010
    Date of Patent: September 25, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Kakikawa, Masako Udagawa, Shuichi Okazaki, Yuuhei Shimizu, Hideyuki Takai, Shinichi Hakamada, Kouhei Nakagawa, Hideki Takayama
  • Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
    Patent number: 8216355
    Abstract: An ink contains at least a pigment, wherein the pigment is C.I. Pigment Red 282, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95?D50?150, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5?D90/D50?2.5.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: July 10, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masako Udagawa, Shuichi Okazaki, Hiroshi Kakikawa, Yuuhei Shimizu, Shinichi Hakamada, Hideyuki Takai
  • INK, INK JET RECORDING METHOD, INK CARTRIDGE, AND INK JET RECORDING APPARATUS
    Publication number: 20100201769
    Abstract: An ink contains at least a pigment, wherein the pigment is a solid solution of C.I. Pigment Red 202 and C.I. Pigment Violet 19, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95?(=<)D50?(=<)130, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5?(=<)D90/D50?(=<)2.2.
    Type: Application
    Filed: February 4, 2010
    Publication date: August 12, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Kakikawa, Masako Udagawa, Shuichi Okazaki, Yuuhei Shimizu, Hideyuki Takai, Shinichi Hakamada, Kouhei Nakagawa, Hideki Takayama
  • INK, INK JET RECORDING METHOD, INK CARTRIDGE, AND INK JET RECORDING APPARATUS
    Publication number: 20100201768
    Abstract: An ink contains at least a pigment, wherein the pigment is C.I. Pigment Red 282, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95?D50?150, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5?D90/D50?2.5.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 12, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Masako Udagawa, Shuichi Okazaki, Hiroshi Kakikawa, Yuuhei Shimizu, Shinichi Hakamada, Hideyuki Takai
  • Ink, ink jet recording method, ink cartridge, and ink jet recording apparatus
    Patent number: RE44863
    Abstract: An ink contains at least a pigment, wherein the pigment is a solid solution of C.I. Pigment Red 202 and C.I. Pigment Violet 19, and a primary particle diameter D (nm) of the pigment and a 50%-cumulative diameter D50 (nm) in particle diameter distribution of the pigment satisfy a relation of D×0.95?(=<)D50?(=<)130, and a 90%-cumulative diameter D90 (nm) in particle diameter distribution of the pigment and the 50%-cumulative diameter D50 (nm) satisfy a relation of 1.5?(=<)D90/D50?(=<)2.2.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: April 29, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroshi Kakikawa, Masako Udagawa, Shuichi Okazaki, Yuuhei Shimizu, Hideyuki Takai, Shinichi Hakamada, Kouhei Nakagawa, Hideki Takayama