Patents by Inventor Masaki Hosaka

Masaki Hosaka 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: 9018299
    Abstract: An object of the present invention is to provide a colored liquid with superior separability from polar solvents for use with an electrowetting or electrofluidic device that uses a coloring agent added as a colorant to a nonpolar solvent. A colored liquid according to the present invention contains a nonpolar solvent and a colorant, and the colorant is a modified pigment containing a pigment (A) and a polymer (P) formed on a surface thereof by polymerizing a polymer (B) soluble in a nonaqueous solvent and at least one polymerizable unsaturated monomer (C) that is soluble in the nonaqueous solvent and that becomes insoluble or poorly soluble in the nonaqueous solvent after polymerization. A multi-phase liquid colored composition according to the present invention contains the colored liquid and a polar solvent immiscible with the colored liquid.
    Type: Grant
    Filed: October 17, 2012
    Date of Patent: April 28, 2015
    Assignee: DIC Corporation
    Inventors: Masaki Hosaka, Yukie Uemura
  • Publication number: 20140374668
    Abstract: An object of the present invention is to provide a colored liquid with superior separability from polar solvents for use with an electrowetting or electrofluidic device that uses a coloring agent added as a colorant to a nonpolar solvent. A colored liquid according to the present invention contains a nonpolar solvent and a colorant, and the colorant is a modified pigment containing a pigment (A) and a polymer (P) formed on a surface thereof by polymerizing a polymer (B) soluble in a nonaqueous solvent and at least one polymerizable unsaturated monomer (C) that is soluble in the nonaqueous solvent and that becomes insoluble or poorly soluble in the nonaqueous solvent after polymerization. A multi-phase liquid colored composition according to the present invention contains the colored liquid and a polar solvent immiscible with the colored liquid.
    Type: Application
    Filed: October 17, 2012
    Publication date: December 25, 2014
    Applicant: DIC CORPORATION
    Inventors: Masaki Hosaka, Yukie Uemura
  • Patent number: 7671096
    Abstract: The light stabilizer emulsion composition of the present invention includes: water; an emulsifier; and a light stabilizer and/or a UV absorber, in which components constituting the light stabilizer emulsion composition has an average particle size of 150 nm or less.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: March 2, 2010
    Assignee: Adeka Corporation
    Inventors: Masaki Hosaka, Masatoshi Honma, Yoshihide Kondo
  • Patent number: 7514569
    Abstract: A benzimidazolone compound represented by a general formula (1), (in the formula, each of R1, R2, R3 and R4 represents independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms).
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: April 7, 2009
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventor: Masaki Hosaka
  • Patent number: 7371870
    Abstract: There are provided benzimidazolone compounds that provide a plurality of hues from a single structural formula, and are useful as pigments that offer superior dispersibility in binder resins, as well as benzimidazolone compounds that are useful as pigments, and show minimal flocculation when pigments of two or more different hues are blended together to produced a desired hue. A benzimidazolone compound represented by a general formula (1) shown below. (wherein, R1, R2, R3 and R4 each represent, independently, a hydrogen atom, an alkyl group of 1 to 5 carbon atoms, or an alkoxy group of 1 to 5 carbon atoms, and R5 and R6 each represent, independently, an alkyl group of 1 to 5 carbon atoms).
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: May 13, 2008
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Masaki Hosaka, Toshio Takei
  • Publication number: 20070135639
    Abstract: A benzimidazolone compound represented by a general formula (1), (in the formula, each of R1, R2, R3 and R4 represents independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms).
    Type: Application
    Filed: December 7, 2004
    Publication date: June 14, 2007
    Inventor: Masaki Hosaka
  • Publication number: 20060183824
    Abstract: The light stabilizer emulsion composition of the present invention includes: water; an emulsifier; and a light stabilizer and/or a UV absorber, in which components constituting the light stabilizer emulsion composition has an average particle size of 150 nm or less.
    Type: Application
    Filed: February 10, 2006
    Publication date: August 17, 2006
    Inventors: Masaki Hosaka, Masatoshi Homma, Yoshihide Kondo
  • Publication number: 20060058531
    Abstract: There are provided benzimidazolone compounds that provide a plurality of hues from a single structural formula, and are useful as pigments that offer superior dispersibility in binder resins, as well as benzimidazolone compounds that are useful as pigments, and show minimal flocculation when pigments of two or more different hues are blended together to produced a desired hue. A benzimidazolone compound represented by a general formula (1) shown below. (wherein, R1, R2, R3 and R4 each represent, independently, a hydrogen atom, an alkyl group of 1 to 5 carbon atoms, or an alkoxy group of 1 to 5 carbon atoms, and R5 and R6 each represent, independently, an alkyl group of 1 to 5 carbon atoms.
    Type: Application
    Filed: June 23, 2004
    Publication date: March 16, 2006
    Inventors: Masaki Hosaka, Toshio Takei