Patents by Inventor Kimihiko Ookubo

Kimihiko Ookubo 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: 9062225
    Abstract: Provided is a production process for a colorant which contains a silicon phthalocyanine compound making it possible to reach a targeted particle diameter even by a conventional dispersing method and which is excellent in performances such as a color reproducibility, a light fastness, an electrostatic property, a transparency and the like, and a colorant composition, a toner, an ink for ink jet recording and a color filter which are excellent in the above performances. The above production process is a production process for a colorant containing a silicon phthalocyanine compound and a copper phthalocyanine compound and is characterized by having a preparing step of reacting raw materials of a silicon compound and phthalocyanine under the presence of a copper salt or the copper phthalocyanine compound described above to prepare the silicon phthalocyanine compound described above.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: June 23, 2015
    Assignee: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Keiko Ishidai, Kimihiko Ookubo
  • Publication number: 20150050592
    Abstract: The present invention relates to toner for electrostatic charge image development including a resin, a metal-containing compound, and a colorant compound precursor to be converted to a colorant compound through a reaction with the metal-containing compound by heat applied at heat fixing. According to the present invention, it is possible to provide toner for electrostatic charge image development which is excellent in fluidity and storage stability and a method of manufacturing the same.
    Type: Application
    Filed: July 23, 2014
    Publication date: February 19, 2015
    Inventors: Junya Ueda, Hiroyuki Yasukawa, Asao Matsushima, Kimihiko Ookubo
  • Patent number: 8846965
    Abstract: Disclosed is a toner for electrophotography, which has good hue, good light resistance and good electrostatic charge, and is capable of providing images that are free from white spots. The toner for electrophotography exhibits a good performance. Specifically disclosed is a toner for electrophotography, which is characterized by containing at least one metal-containing compound that is represented by general formula (1). (In the formula, R1 represents an alkyl group; R2 represents a hydrogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, a sulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, an acyl group, a halogen atom or a cyano group; and R3 represents a group that has 9 or more carbon atoms and an aromatic hydrocarbon structure.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: September 30, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kimihiko Ookubo, Keiko Ishidai, Issei Nakahara
  • Patent number: 8729285
    Abstract: A copper complex compound represented by Formula (1) is disclosed. in the formula, groups represented by R is a substituent, n is an integer of from 1 to 5 and the total carbon number contained in (R)n is 14 or more. A toner for electrophotography containing the compound is also disclosed.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: May 20, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Koji Daifuku, Ryohei Iwamoto, Keiko Ishidai, Kimihiko Ookubo, Kaori Ono, Issei Nakahara
  • Publication number: 20130260306
    Abstract: Provided is a production process for a colorant which contains a silicon phthalocyanine compound making it possible to reach a targeted particle diameter even by a conventional dispersing method and which is excellent in performances such as a color reproducibility, a light fastness, an electrostatic property, a transparency and the like, and a colorant composition, a toner, an ink for ink jet recording and a color filter which are excellent in the above performances. The above production process is a production process for a colorant containing a silicon phthalocyanine compound and a copper phthalocyanine compound and is characterized by having a preparing step of reacting raw materials of a silicon compound and phthalocyanine under the presence of a copper salt or the copper phthalocyanine compound described above to prepare the silicon phthalocyanine compound described above.
    Type: Application
    Filed: March 15, 2013
    Publication date: October 3, 2013
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Keiko ISHIDAI, Kimihiko OOKUBO
  • Publication number: 20130253213
    Abstract: Provided is a method for producing cyanoacetic acid in a hydrolysis reaction of a predetermined cyanoacetate in the presence of an acid catalyst. Further, are provided methods for producing a cyanoacetic acid derivative and a metal containing compound by using the produced cyanoacetic acid as a staring material. Herein, the method for producing cyanoacetic acid enables the content of a malonic acid byproduct generated in the hydrolysis reaction to be greatly lowered, allowing the produced cyanoacetic acid to be used as a starting material without any purification treatments. Those advantageous effects result in the great improvement in the purity and yields of the cyanoacetic acid derivative and the metal containing compound produced by said cyanoacetic acid. Accordingly, the above mentioned methods make it possible to produce cyanoacetic acid, the cyanoacetic acid derivative and the metal containing compound, as excellent in the productivity and economical efficiency.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 26, 2013
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Dai IKEMIZU, Ryohei IWAMOTO, Keiko ISHIDAI, Kimihiko OOKUBO
  • Publication number: 20130157191
    Abstract: The present invention provides a toner for electrophotography capable of achieving high color reproducibility in a wide brightness region ranging from high to low brightness. This toner for electrophotography containing a compound represented by general formula (X-1) is characterized in that when the toner image formed exclusively from the toner is at maximum saturation, the hue angle (H) of the toner in a CIE L*a*b* color space is within the range of 341°?H?351°. [Formula 1] (In the formula: one of Rx1 and Rx2 is a methyl group or an ethyl group, while the other represents an alkyl group with C12 or less optionally substituted by a group including an oxygen atom, or a 5- or 6-membered aliphatic ring optionally substituted by a group including an oxygen atom connecting a nitrogen atom and Rx1 and Rx2; and GX2 represents an alkyl group optionally substituted by a group including an oxygen atom.
    Type: Application
    Filed: July 19, 2011
    Publication date: June 20, 2013
    Applicant: KONICA MINOLAT BUSINESS TECHNOLOGIES, INC.
    Inventors: Kimihiko Ookubo, Ryohei Iwamoto, Keigo Tamaki, Yutaro Hakoi
  • Patent number: 8329368
    Abstract: An electrophotographic toner is disclosed. The toner contains a compound of Formula X-1 and a copper complex compound represented by the following Formula (1), which are defined detain in the specification.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: December 11, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Koji Daifuku, Ryohei Iwamoto, Keiko Ishidai, Kimihiko Ookubo, Kaori Ono, Issei Nakahara
  • Patent number: 8269018
    Abstract: A compound represented by Formula (X-1) is disclosed. in the formula, Rx1 and Rx2 each independently represents an alkyl group, Lx is a hydrogen atom or an alkyl group, Gx1 is an alkyl group having 2 or more carbon atoms, Gx2 is an alkyl group or an aromatic hydrocarbon group, Gx3 is a hydrogen atom, a halogen atom, a Gx4-CO—NH— group or a Gx5-N(Gx6)-CO—group, Gx5 and Gx6 each independently represents a hydrogen atom or a substituent, and Qx1, Qx2, Qx3, Qx4 and Qx5 each independently represents a hydrogen atom or a substituent. An electrophotographic toner containing the compound is also disclosed.
    Type: Grant
    Filed: July 27, 2011
    Date of Patent: September 18, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kimihiko Ookubo, Ryohei Iwamoto, Koji Daifuku, Keiko Ishidai, Kaori Ono, Issei Nakahara
  • Publication number: 20120231385
    Abstract: An electrophotographic toner set which is excellent in color reproduction of low lightness regions to high lightness regions in an intermediate color region (red) is disclosed, comprising at least a yellow toner, a magenta toner and a third electrophotographic toner, wherein, in a color specification system of a CIE LAB color space, a lightness L* of the magenta toner is within a range of 35-50, a lightness L* and a hue angle h of the third electrophotographic toner is within a range of 50-65 and 0-65°, respectively, and a difference in hue angle between a color represented by the yellow toner and a color represented by the magenta toner is within a range of 114-130°.
    Type: Application
    Filed: November 9, 2010
    Publication date: September 13, 2012
    Applicant: Konica Minolta Business Technologies, Inc.
    Inventors: Keigo Tamaki, Kimihiko Ookubo
  • Publication number: 20120208119
    Abstract: A toner for electrophotography characterized in that, when a monochromatic image of the toner for electrophotography is formed and the reflection absorption spectrum thereof is measured, said reflection absorption spectrum shows a maximum density within a range of 600-700 nm, and, excluding the light absorption by a substrate, the maximum density (Dm) of said reflection absorption spectrum, the density thereof at 570 nm (D(570)) and the density thereof at 530 nm (D(530)) satisfy the following requirements, and a toner set for electrophotography: 1.4?Dm?3.5, D(570)?0.55 and 4.5?D(570)/D(530)?12.
    Type: Application
    Filed: October 25, 2010
    Publication date: August 16, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Ryohei Iwamoto, Kimihiko Ookubo
  • Publication number: 20120116110
    Abstract: Disclosed is a toner for electrophotography, which has good hue, good light resistance and good electrostatic charge, and is capable of providing images that are free from white spots. The toner for electrophotography exhibits a good performance. Specifically disclosed is a toner for electrophotography, which is characterized by containing at least one metal-containing compound that is represented by general formula (1). (In the formula, R1 represents an alkyl group; R2 represents a hydrogen atom, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfamoyl group, a sulfinyl group, an alkylsulfonyl group, an arylsulfonyl group, an acyl group, a halogen atom or a cyano group; and R3 represents a group that has 9 or more carbon atoms and an aromatic hydrocarbon structure.
    Type: Application
    Filed: June 4, 2010
    Publication date: May 10, 2012
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGOIES, INC.
    Inventors: Kimihiko Ookubo, Keiko Ishidai, Issei Nakahara
  • Publication number: 20110300481
    Abstract: A compound represented by Formula (X-1) is disclosed. in the formula, Rx1 and Rx2 each independently represents an alkyl group, Lx is a hydrogen atom or an alkyl group, Gx1 is an alkyl group having 2 or more carbon atoms, Gx2 is an alkyl group or an aromatic hydrocarbon group, Gx3 is a hydrogen atom, a halogen atom, a Gx4-CO—NH— group or a Gx5-N(Gx6)-CO—group, Gx5 and Gx6 each independently represents a hydrogen atom or a substituent, and Qx1, Qx2, Qx3, Qx4 and Qx5 each independently represents a hydrogen atom or a substituent. An electrophotographic toner containing the compound is also disclosed.
    Type: Application
    Filed: July 27, 2011
    Publication date: December 8, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kimihiko OOKUBO, Ryohei IWAMOTO, Koji DAIFUKU, Keiko ISHIDAI, Kaori ONO, Issei NAKAHARA
  • Publication number: 20110152556
    Abstract: A copper complex compound represented by Formula (1) is disclosed. in the formula, groups represented by R is a substituent, n is an integer of from 1 to 5 and the total carbon number contained in (R)n is 14 or more. A toner for electrophotography containing the compound is also disclosed.
    Type: Application
    Filed: March 3, 2011
    Publication date: June 23, 2011
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Koji DAIFUKU, Ryohei IWAMOTO, Keiko ISHIDAI, Kimihiko OOKUBO, Kaori ONO, Issei NAKAHARA
  • Patent number: 7943279
    Abstract: A copper complex compound represented by Formula (1) is disclosed. in the formula, groups represented by R is a substituent, n is an integer of from 1 to 5 and the total carbon number contained in (R) n is 14 or more. A toner for electrophotography containing the compound is also disclosed.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: May 17, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Koji Daifuku, Ryohei Iwamoto, Keiko Ishidai, Kimihiko Ookubo, Kaori Ono, Issei Nakahara
  • Publication number: 20090233208
    Abstract: A copper complex compound represented by Formula (1) is disclosed. in the formula, groups represented by R is a substituent, n is an integer of from 1 to 5 and the total carbon number contained in (R) n is 14 or more. A toner for electrophotography containing the compound is also disclosed.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Koji DAIFUKU, Ryohei IWAMOTO, Keiko ISHIDAI, Kimihiko OOKUBO, Kaori ONO, Issei NAKAHARA
  • Publication number: 20090233207
    Abstract: A compound represented by Formula (X-1) is disclosed. in the formula, Rx1, and Rx2 each independently represents an alkyl group, Lx is a hydrogen atom or an alkyl group, Gx1 is an alkyl group having 2 or more carbon atoms, Gx2 is an alkyl group or an aromatic hydrocarbon group, Gx3 is a hydrogen atom, a halogen atom, a Gx4-CO—NH— group or a Gx5-N(Gx6)-CO— group, Gx5 and Gx6 each independently represents a hydrogen atom or a substituent, and Qx1, Qx2, Qx3, Qx4 and Qx5 each independently represents a hydrogen atom or a substituent. An electrophotographic toner containing the compound is also disclosed.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Kimihiko OOKUBO, Ryohei IWAMOTO, Koji DAIFUKU, Keiko ISHIDAI, Kaori ONO, Issei NAKAHARA
  • Publication number: 20090233209
    Abstract: An electrophotographic toner is disclosed. The toner contains a compound of Formula X-1 and a copper complex compound represented by the following Formula (1), which are defined detain in the specification.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Koji Daifuku, Ryohei Iwamoto, Keiko Ishidai, Kimihiko Ookubo, Kaori Ono, Issei Nakahara
  • Publication number: 20090041945
    Abstract: An active ray curable composition comprising a compound represented by Formula (X):
    Type: Application
    Filed: March 15, 2006
    Publication date: February 12, 2009
    Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.
    Inventors: Kimihiko Ookubo, Norio Miura, Takeshi Kurata
  • Publication number: 20080180501
    Abstract: This invention provides an actinic ray curable composition, which exhibits excellent storage stability, low viscosity, high sensitivity and can form cured film having high hardness and superior weather-proofing under various environments particularly even under a high humidity atmosphere, and actinic ray curable ink utilizing the same, an image forming method utilizing said actinic ray curable ink as ink-jet ink, an ink-jet recording apparatus and a new epoxy compound. An actinic ray curable composition of this invention is characterized by containing at least one type of an epoxy compound represented by following Formula (X) and at least one type of an oxetane compound as a photo polymerizable compound and having a viscosity at 25° C. of 1-500 mPa·s.
    Type: Application
    Filed: November 21, 2005
    Publication date: July 31, 2008
    Applicant: KONICA MINOLTA MEDICAL & GRAPHIC, INC.
    Inventors: Kimihiko Ookubo, Norio Miura, Takeshi Kurata