Patents by Inventor Shunji Maekawa

Shunji Maekawa 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: 7641328
    Abstract: An ink for ink jet recording includes water, a water-soluble organic solvent, a water-insoluble color material, a dispersant, and a compound expressed by the following chemical formula: R—O—(CH2CH2O)n—H ??(I) where R is an alkyl group having a carbon number of 25 to 150 and n is from 2 to 100. The ink not only can maintain performances such as storage stability and high-quality recording images, but also can effectively prevent nozzle clogging, exhibit good dispersion stability, and achieve a high redispersion property that ensures stable ejection both during long continuous operation and after stopping the operation for a long time.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: January 5, 2010
    Assignee: Kiwa Chemical Industry Co., Ltd.
    Inventors: Shunji Maekawa, Hiroki Tanaka
  • Patent number: 7237886
    Abstract: An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, and a dispersant. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, and exhibit good dispersion stability.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: July 3, 2007
    Assignee: Kiwa Chemical Industry Co., Ltd.
    Inventors: Shunji Maekawa, Hiroki Tanaka
  • Patent number: 7234805
    Abstract: An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, a dispersant, and a compound expressed by the following chemical formula (I): R—O—(CH2CH2O)n—H??(I) where R is an alkyl group having a carbon number of 25 to 150 and n is from 2 to 100. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, exhibit good dispersion stability, and achieve a high redispersion property that ensures stable ejection both during long continuous operation and after stopping the operation for a long time.
    Type: Grant
    Filed: August 14, 2003
    Date of Patent: June 26, 2007
    Assignee: Kiwa Chemical Industry Co., Ltd.
    Inventors: Shunji Maekawa, Hiroki Tanaka
  • Publication number: 20050093947
    Abstract: An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, and a dispersant. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, and exhibit good dispersion stability.
    Type: Application
    Filed: August 14, 2003
    Publication date: May 5, 2005
    Inventors: Shunji Maekawa, Hiroki Tanaka
  • Publication number: 20050036019
    Abstract: An ink for sublimation transfer ink jet recording includes water, at least one sugar alcohol containing not less than four OH groups, a sublimation dye, a dispersant, and a compound expressed by the following chemical formula (I): R—O—(CH2CH2O)n—H??(I) where R is an alkyl group having a carbon number of 25 to 150 and n is from 2 to 100. The ink is printed on a sheet medium by ink jet printing, and then the sheet medium is heated to sublimate and transfer the sublimation dye onto an object to be dyed. The ink for ink jet recording and the sublimation transfer dyeing method using the ink not only can maintain performances such as storage stability and high-quality recording images, but also can reduce environmental pollution, effectively prevent nozzle clogging, exhibit good dispersion stability, and achieve a high redispersion property that ensures stable ejection both during long continuous operation and after stopping the operation for a long time.
    Type: Application
    Filed: August 14, 2003
    Publication date: February 17, 2005
    Inventors: Shunji Maekawa, Hiroki Tanaka
  • Publication number: 20040196343
    Abstract: An ink for ink jet recording includes water, a water-soluble organic solvent, a water-insoluble color material, a dispersant, and a compound expressed by the following chemical formula:
    Type: Application
    Filed: February 26, 2004
    Publication date: October 7, 2004
    Inventors: Shunji Maekawa, Hiroki Tanaka