Patents by Inventor Muneyoshi Sunada

Muneyoshi Sunada 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).

  • Patent number: 7867586
    Abstract: Provided is an inkjet recording medium in which hydrated alumina and a sulfinic acid compound or thiosulfonic acid compound coexist in a pigment in an ink receiving layer, and which can prevent white-background yellowing during storage in a resin file holder or the like and ensure printing quality at the same time. The ink receiving layer of the inkjet recording medium contains the sulfinic acid compound or thiosulfonic acid compound, which functions to prevent yellowing, in a salt form or in a free form so as to be diffusible.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: January 11, 2011
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hisao Kamo, Masanori Ito, Takashi Sawada, Muneyoshi Sunada, Yasuyuki Ishida, Hiroshi Asakawa, Tsuyoshi Santo, Mariko Suzuki, Satoko Ito
  • Publication number: 20100098866
    Abstract: The invention provides a recording medium providing an image storage property over a prolonged period and satisfactory recording properties at the same time, and a producing method for securely realizing such characteristics. In incorporating a colorant deterioration preventing agent in an ink-receiving layer, the colorant deterioration preventing agent is dissolved in a solvent and is applied on the ink-receiving layer thereby forming a high concentration region containing the colorant deterioration preventing agent at a high concentration and a low concentration region containing the colorant deterioration preventing agent at a low concentration, with the high concentration region positioned closer to the recording surface.
    Type: Application
    Filed: December 23, 2009
    Publication date: April 22, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Nagashima, Tsuyoshi Santo, Motoaki Sato, Hiroshi Asakawa, Muneyoshi Sunada, Satoko Kakumoto
  • Patent number: 7662452
    Abstract: The invention provides a recording medium providing an image storage property over a prolonged period and satisfactory recording properties at the same time, and a producing method for securely realizing such characteristics. In incorporating a colorant deterioration preventing agent in an ink-receiving layer, the colorant deterioration preventing agent is dissolved in a solvent and is applied on the ink-receiving layer thereby forming a high concentration region containing the colorant deterioration preventing agent at a high concentration and a low concentration region containing the colorant deterioration preventing agent at a low concentration, with the high concentration region positioned closer to the recording surface.
    Type: Grant
    Filed: August 3, 2004
    Date of Patent: February 16, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hitoshi Nagashima, Tsuyoshi Santo, Motoaki Sato, Hiroshi Asakawa, Muneyoshi Sunada, Satoko Kakumoto
  • Patent number: 7291361
    Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.
    Type: Grant
    Filed: August 13, 2004
    Date of Patent: November 6, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
  • Publication number: 20060182906
    Abstract: Provided is an inkjet recording medium in which hydrated alumina and a sulfinic acid compound or thiosulfonic acid compound coexist in a pigment in an ink receiving layer, and which can prevent white-background yellowing during storage in a resin file holder or the like and ensure printing quality at the same time. The ink receiving layer of the inkjet recording medium contains the sulfinic acid compound or thiosulfonic acid compound, which functions to prevent yellowing, in a salt form or in a free form so as to be diffusible.
    Type: Application
    Filed: April 4, 2006
    Publication date: August 17, 2006
    Applicant: Canon Kabushiki Kaisha
    Inventors: Hisao Kamo, Masanori Ito, Takashi Sawada, Muneyoshi Sunada, Yasuyuki Ishida, Hiroshi Asakawa, Tsuyoshi Santo, Mariko Suzuki, Satoko Ito
  • Publication number: 20050058786
    Abstract: The invention provides a recording medium providing an image storage property over a prolonged period and satisfactory recording properties at the same time, and a producing method for securely realizing such characteristics. In incorporating a colorant deterioration preventing agent in an ink-receiving layer, the colorant deterioration preventing agent is dissolved in a solvent and is applied on the ink-receiving layer thereby forming a high concentration region containing the colorant deterioration preventing agent at a high concentration and a low concentration region containing the colorant deterioration preventing agent at a low concentration, with the high concentration region positioned closer to the recording surface.
    Type: Application
    Filed: August 3, 2004
    Publication date: March 17, 2005
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hitoshi Nagashima, Tsuyoshi Santo, Motoaki Sato, Hiroshi Asakawa, Muneyoshi Sunada, Satoko Kakumoto
  • Patent number: 6848781
    Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which includes the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.
    Type: Grant
    Filed: September 26, 2003
    Date of Patent: February 1, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
  • Publication number: 20050007436
    Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.
    Type: Application
    Filed: August 13, 2004
    Publication date: January 13, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada
  • Publication number: 20040135864
    Abstract: Disclosed herein is an image forming process for forming an image-recorded article having a coating layer on at least a part of an image formed, which comprises the steps of providing a liquid composition containing a polymer, providing an image-recorded article formed on a recording medium by an ink-jet recording method, and applying the liquid composition to at least a part of an image of the recorded article to insolubilize the polymer contained in the liquid composition on the surface of the image, thereby forming the coating layer at a position to which the liquid composition has been applied, wherein the recording medium has a surface which insolubilizes the polymer.
    Type: Application
    Filed: September 26, 2003
    Publication date: July 15, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Ogino, Motoo Urawa, Muneyoshi Sunada, Yoichi Takada, Masanori Ito, Hiroshi Asakawa, Hideki Takayama, Hitoshi Nagashima, Takashi Sawada