Patents by Inventor Miyuki Dobata

Miyuki Dobata 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).

  • Oil-based ink composition
    Patent number: 9428660
    Abstract: An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10, when ions in the ink composition are transferred to water. This oil-based ink composition prevents corrosion of a nozzle plate and is improved in storage stability, and thus can ensure printer reliability such as ink-jet stability obtainable even after long storage thereof, and can withstand outdoor service environments.
    Type: Grant
    Filed: January 22, 2014
    Date of Patent: August 30, 2016
    Assignee: HITACHI MAXELL, LTD.
    Inventors: Tomohisa Nishimoto, Miyuki Dobata, Kanryo Terasawa
  • OIL-BASED INK COMPOSITION
    Publication number: 20140135432
    Abstract: An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10, when ions in the ink composition are transferred to water. This oil-based ink composition prevents corrosion of a nozzle plate and is improved in storage stability, and thus can ensure printer reliability such as ink-jet stability obtainable even after long storage thereof, and can withstand outdoor service environments.
    Type: Application
    Filed: January 22, 2014
    Publication date: May 15, 2014
    Applicant: HITACHI MAXELL, LTD.
    Inventors: Tomohisa NISHIMOTO, Miyuki DOBATA, Kanryo TERASAWA
  • Oil-based ink composition
    Patent number: 8669318
    Abstract: An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10, when ions in the ink composition are transferred to water. This oil-based ink composition prevents corrosion of a nozzle plate and is improved in storage stability, and thus can ensure printer reliability such as ink-jet stability obtainable even after long storage thereof, and can withstand outdoor service environments.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: March 11, 2014
    Assignee: Hitachi Maxell, Ltd.
    Inventors: Tomohisa Nishimoto, Miyuki Dobata, Kanryo Terasawa
  • OIL-BASED INK COMPOSITION
    Publication number: 20090088500
    Abstract: An oil-based ink composition comprising a colorant, an organic solvent and a polymeric compound, and optionally an alkylamine ethylene oxide derivative as a pH adjusting agent, in which the pH of an aqueous phase is from 5.5 to 10, when ions in the ink composition are transferred to water. This oil-based ink composition prevents corrosion of a nozzle plate and is improved in storage stability, and thus can ensure printer reliability such as ink-jet stability obtainable even after long storage thereof, and can withstand outdoor service environments.
    Type: Application
    Filed: March 14, 2007
    Publication date: April 2, 2009
    Inventors: Tomohisa Nishimoto, Miyuki Dobata, Kanryo Terasawa