Patents by Inventor Katsutoshi Aoki

Katsutoshi Aoki 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: 8921021
    Abstract: A polyester resin for a toner obtained by polycondensing a carboxylic acid component and an alcohol component, wherein the polyester resin for a toner is obtained using, as the carboxylic acid component and/or the alcohol component, a specified aromatic compound; a polyester resin for a toner obtained by polycondensing a reaction product obtained by treating a specified aromatic compound with a carboxylic acid having an unsaturated reactive group, a carboxylic acid component, and an alcohol component; a resin binder for a toner, containing the polyester resin for a toner; and a toner for electrophotography, containing the resin binder. The polyester resin for a toner of the present invention is suitably used for a resin binder of a toner used in developing and the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: December 30, 2014
    Assignee: Kao Corporation
    Inventors: Norihiro Fukuri, Takashi Kubo, Yasunori Inagaki, Katsutoshi Aoki
  • Patent number: 8841057
    Abstract: A resin binder for use in a toner for electrophotography, containing a polycondensation resin obtainable by polycondensing an alcohol component containing an aliphatic polyhydric alcohol having two or more secondary carbon atoms with a hydroxyl group bound thereto (an alcohol A), and a carboxylic acid component, wherein the alcohol A is contained in an amount of from 10 to 100% by mol, of the alcohol component; and a toner for electrophotography containing the resin binder. The toner for electrophotography of the present invention is suitably used in developing latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: September 23, 2014
    Assignee: Kao Corporation
    Inventors: Katsutoshi Aoki, Norihiro Fukuri, Takashi Kubo, Yoshitomo Kimura, Yasunori Inagaki, Yoshihiro Ueno, Hidenori Tachi
  • Patent number: 8835087
    Abstract: A polyester for a toner obtained by polycondensing an aliphatic hydroxycarboxylic acid compound having a total number of hydroxy group or groups and carboxyl group or groups of 4 or more; an alcohol component containing an aliphatic diol having a hydroxyl group bound to a secondary carbon atom in an amount of 50% by mol or more; and a carboxylic acid component, provided that the aliphatic hydroxycarboxylic compound is not included, wherein the aliphatic hydroxycarboxylic acid compound and the aliphatic diol having a hydroxyl group bound to a secondary carbon atom are in a molar ratio, i.e. the aliphatic hydroxycarboxylic acid compound/the aliphatic diol having a hydroxyl group bound to a secondary carbon atom, of from 0.05 to 0.8; a resin binder for a toner, containing the polyester; and a toner for electrophotography, containing the resin binder.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: September 16, 2014
    Assignee: Kao Corporation
    Inventors: Norihiro Fukuri, Takashi Kubo, Katsutoshi Aoki, Yasunori Inagaki
  • Patent number: 8309291
    Abstract: A polyester for a toner, obtainable by polycondensing an alcohol component and a carboxylic acid component containing a (meth)acrylic acid-modified rosin; and a toner containing the polyester for a toner. The polyester for a toner of the present invention is usable as a resin binder for a toner usable in, for example, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: November 13, 2012
    Assignee: Kao Corporation
    Inventors: Yoshitomo Kimura, Yasunori Inagaki, Katsutoshi Aoki, Takashi Kubo, Yoshihiro Ueno
  • Patent number: 8261848
    Abstract: A plurality of weight hammers (7,8) are provided, and each of the plurality of weight hammers has a shape for substantially evenly applying a hammering force with respect to a surface to be hammered of an object to be hammered (11), about a center line of the object to be hammered. Rotors (9, 10) for driving the weight hammers (7,8) are provided to the same rotating shaft (22) in such a positional relation that an engagement claw (9a) of one rotor (9) engages and drives one weight hammer (7), and, when engagement of the weight hammer (7) is released, an engagement claw (10a) of another rotor (10) in driving engages another weight hammer (8). The rotors are driven by the same driving means (26).
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: September 11, 2012
    Assignee: EMS Co., Ltd.
    Inventor: Katsutoshi Aoki
  • Publication number: 20120184700
    Abstract: A polyester resin for a toner obtained by polycondensing a carboxylic acid component and an alcohol component, wherein the polyester resin for a toner is obtained using, as the carboxylic acid component and/or the alcohol component, a specified aromatic compound; a polyester resin for a toner obtained by polycondensing a reaction product obtained by treating a specified aromatic compound with a carboxylic acid having an unsaturated reactive group, a carboxylic acid component, and an alcohol component; a resin binder for a toner, containing the polyester resin for a toner; and a toner for electrophotography, containing the resin binder. The polyester resin for a toner of the present invention is suitably used for a resin binder of a toner used in developing and the like of latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Application
    Filed: October 1, 2010
    Publication date: July 19, 2012
    Applicant: Kao Corporation
    Inventors: Norihiro Fukuri, Takashi Kubo, Yasunori Inagaki, Katsutoshi Aoki
  • Publication number: 20120184708
    Abstract: A polyester for a toner obtained by polycondensing an aliphatic hydroxycarboxylic acid compound having a total number of hydroxy group or groups and carboxyl group or groups of 4 or more; an alcohol component containing an aliphatic diol having a hydroxyl group bound to a secondary carbon atom in an amount of 50% by mol or more; and a carboxylic acid component, provided that the aliphatic hydroxycarboxylic compound is not included, wherein the aliphatic hydroxycarboxylic acid compound and the aliphatic diol having a hydroxyl group bound to a secondary carbon atom are in a molar ratio, i.e. the aliphatic hydroxycarboxylic acid compound/the aliphatic diol having a hydroxyl group bound to a secondary carbon atom, of from 0.05 to 0.8; a resin binder for a toner, containing the polyester; and a toner for electrophotography, containing the resin binder.
    Type: Application
    Filed: September 30, 2010
    Publication date: July 19, 2012
    Applicant: Kao Corporation
    Inventors: Norihiro Fukuri, Takashi Kubo, Katsutoshi Aoki, Yasunori Inagaki
  • Patent number: 8067144
    Abstract: The present invention relates to a polyester having an excellent hydrolysis resistance even when used in a process for producing a toner for electrophotography which includes a step of forming a raw material into particles in an aqueous medium, and a toner for electrophotography which contains the polyester and is excellent in storage stability and fixing property. There are provided a polyester for a toner for electrophotography which is used in a process for producing a toner including a step of forming a raw material component into particles in an aqueous medium or a solution, and produced by polycondensing an alcohol component with a carboxylic acid component containing at least one compound selected from the group consisting of an alkyl succinic acid and an alkenyl succinic acid, as well as a toner for electrophotography which contains the polyester.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: November 29, 2011
    Assignee: Kao Corporation
    Inventors: Hiroshi Mizuhata, Takashi Kubo, Takashi Mukai, Hidehito Ikebata, Katsutoshi Aoki
  • Publication number: 20110212395
    Abstract: A resin binder for use in a toner for electrophotography, containing a polycondensation resin obtainable by polycondensing an alcohol component containing an aliphatic polyhydric alcohol having two or more secondary carbon atoms with a hydroxyl group bound thereto (an alcohol A), and a carboxylic acid component, wherein the alcohol A is contained in an amount of from 10 to 100% by mol, of the alcohol component; and a toner for electrophotography containing the resin binder. The toner for electrophotography of the present invention is suitably used in developing latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Application
    Filed: October 29, 2008
    Publication date: September 1, 2011
    Applicant: KAO CORPORATION
    Inventors: Katsutoshi Aoki, Norihiro Fukuri, Takashi Kubo, Yoshitomo Kimura, Yasunori Inagaki, Yoshihiro Ueno, Hidenori Tachi
  • Patent number: 7824832
    Abstract: A toner for electrophotography, containing a resin binder containing a polyester-based resin (A) and a polyester-based resin (B) having a softening point of a temperature higher than the polyester-based resin (A) by 10° C. or more, wherein at least one of the polyester-based resins (A) and (B) is a resin derived from a (meth)acrylic acid-modified rosin, having a polyester unit obtainable by polycondensing an alcohol component and a carboxylic acid component containing a (meth)acrylic acid-modified rosin, and a method for producing the toner. The toner for electrophotography of the present invention is usable in, for example, developing or the like latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Grant
    Filed: May 30, 2007
    Date of Patent: November 2, 2010
    Assignee: Kao Corporation
    Inventors: Yoshitomo Kimura, Yasunori Inagaki, Yoshihiro Ueno, Katsutoshi Aoki
  • Publication number: 20100252289
    Abstract: A plurality of weight hammers (7,8) are provided, and each of the plurality of weight hammers has a shape for substantially evenly applying a hammering force with respect to a surface to be hammered of an object to be hammered (11), about a center line of the object to be hammered. Rotors (9, 10) for driving the weight hammers (7,8) are provided to the same rotating shaft (22) in such a positional relation that an engagement claw (9a) of one rotor (9) engages and drives one weight hammer (7), and, when engagement of the weight hammer (7) is released, an engagement claw (10a) of another rotor (10) in driving engages another weight hammer (8). The rotors are driven by the same driving means (26).
    Type: Application
    Filed: November 5, 2007
    Publication date: October 7, 2010
    Applicant: EMS CO., LTD.
    Inventor: Katsutoshi Aoki
  • Publication number: 20090117485
    Abstract: A toner for electrophotography, containing a resin binder containing a polyester-based resin (A) and a polyester-based resin (B) having a softening point of a temperature higher than the polyester-based resin (A) by 10° C. or more, wherein at least one of the polyester-based resins (A) and (B) is a resin derived from a (meth)acrylic acid-modified rosin, having a polyester unit obtainable by polycondensing an alcohol component and a carboxylic acid component containing a (meth)acrylic acid-modified rosin, and a method for producing the toner. The toner for electrophotography of the present invention is usable in, for example, developing or the like latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Application
    Filed: May 30, 2007
    Publication date: May 7, 2009
    Applicant: KAO CORPORATION
    Inventors: Yoshitomo Kimura, Yasunori Inagaki, Yoshihiro Ueno, Katsutoshi Aoki
  • Publication number: 20090069530
    Abstract: A polyester for a toner, obtainable by polycondensing an alcohol component and a carboxylic acid component containing a (meth)acrylic acid-modified rosin; and a toner containing the polyester for a toner. The polyester for a toner of the present invention is usable as a resin binder for a toner usable in, for example, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like.
    Type: Application
    Filed: April 16, 2007
    Publication date: March 12, 2009
    Inventors: Yoshitomo Kimura, Yasunori Inagaki, Katsutoshi Aoki, Takashi Kubo, Yoshihiro Ueno
  • Publication number: 20080248414
    Abstract: The present invention relates to a polyester having an excellent hydrolysis resistance even when used in a process for producing a toner for electrophotography which includes a step of forming a raw material into particles in an aqueous medium, and a toner for electrophotography which contains the polyester and is excellent in storage stability and fixing property. There are provided a polyester for a toner for electrophotography which is used in a process for producing a toner including a step of forming a raw material component into particles in an aqueous medium or a solution, and produced by polycondensing an alcohol component with a carboxylic acid component containing at least one compound selected from the group consisting of an alkyl succinic acid and an alkenyl succinic acid, as well as a toner for electrophotography which contains the polyester.
    Type: Application
    Filed: April 24, 2008
    Publication date: October 9, 2008
    Applicant: KAO CORPORATION
    Inventors: Hiroshi Mizuhata, Takashi Kubo, Takashi Mukai, Hidehito Ikebata, Katsutoshi Aoki
  • Patent number: 7294198
    Abstract: A process for producing single-crystal gallium nitride comprising the steps of performing congruent melting of gallium nitride at a high pressure between 6×104 atm. and 10×104 atm. and at a high temperature between 2,200° C. and 2,500° C. and then slowly cooling the obtained gallium nitride melt at the stated high pressure.
    Type: Grant
    Filed: July 16, 2004
    Date of Patent: November 13, 2007
    Assignee: Japan Atomic Energy Research Institute
    Inventors: Wataru Utsumi, Hiroyuki Saitoh, Katsutoshi Aoki
  • Publication number: 20070219313
    Abstract: The present invention relates to a polyester having an excellent hydrolysis resistance even when used in a process for producing a toner for electrophotography which includes a step of forming a raw material into particles in an aqueous medium, and a toner for electrophotography which contains the polyester and is excellent in storage stability and fixing property. There are provided a polyester for a toner for electrophotography which is used in a process for producing a toner including a step of forming a raw material component into particles in an aqueous medium or a solution, and produced by polycondensing an alcohol component with a carboxylic acid component containing at least one compound selected from the group consisting of an alkyl succinic acid and an alkenyl succinic acid, as well as a toner for electrophotography which contains the polyester.
    Type: Application
    Filed: February 1, 2007
    Publication date: September 20, 2007
    Applicant: KAO CORPORATION
    Inventors: Hiroshi Mizuhata, Takashi Kubo, Takashi Mukai, Hidehito Ikebata, Katsutoshi Aoki
  • Publication number: 20070093597
    Abstract: A polyester resin composition for a toner comprising a titanium compound in an amount of from 0.005 to 4% by weight, and an inorganic phosphorus compound in an amount of from 0.001 to 5% by weight; a toner comprising the polyester resin composition as defined above; and a process for preparing the polyester resin composition for a toner as defined above, comprising the step of polycondensing the raw material monomers for the polyester in the presence of a titanium compound and an inorganic phosphorus compound. The polyester resin composition for a toner is suitably used as a resin binder for a toner for developing a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like, a process for preparing the same, and a toner comprising the polyester resin composition.
    Type: Application
    Filed: November 21, 2006
    Publication date: April 26, 2007
    Applicant: Kao Corporation
    Inventors: Takashi KUBO, Katsutoshi Aoki, Eiji Shirai
  • Patent number: 7205357
    Abstract: A polyester resin composition for a toner comprising a titanium compound in an amount of from 0.005 to 4% by weight, and an inorganic phosphorus compound in an amount of from 0.001 to 5% by weight; a toner comprising the polyester resin composition as defined above; and a process for preparing the polyester resin composition for a toner as defined above, comprising the step of polycondensing the raw material monomers for the polyester in the presence of a titanium compound and an inorganic phosphorus compound. The polyester resin composition for a toner is suitably used as a resin binder for a toner for developing a latent image formed in electrophotography, electrostatic recording method, electrostatic printing method or the like, a process for preparing the same, and a toner comprising the polyester resin composition.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: April 17, 2007
    Assignee: Kao Corporation
    Inventors: Takashi Kubo, Katsutoshi Aoki, Eiji Shirai
  • Patent number: 7014970
    Abstract: A resin composition having a softening point of from 80° to 165° C., obtained by reacting a poly C2-4 alkylene terephthalate having a melting point of 200° C. or more with a low-molecular weight polyester having a number-average molecular weight of from 400 to 2500; a resin binder for a toner comprising the above resin composition; a toner comprising the above resin binder; a process for preparing a resin composition having a softening point of from 80° to 165° C., comprising the step of reacting a poly C2-4 alkylene terephthalate having a melting point of 200° C. or more with a low-molecular weight polyester having a number-average molecular weight of from 400 to 2500. The resin composition can be suitably used as a resin binder for a toner used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing, and the like.
    Type: Grant
    Filed: October 17, 2003
    Date of Patent: March 21, 2006
    Assignee: Kao Corporation
    Inventors: Eiji Morimoto, Hidenori Tachi, Katsutoshi Aoki
  • Patent number: 6998212
    Abstract: A crystalline polyester having a number-average molecular weight of from 5000 to 10000, a weight-average molecular weight of from 150000 to 8000000, a maximum peak temperature of heat of fusion of from 60° to 150° C., and a ratio of a softening point to a maximum peak temperature of heat of fusion (softening point/peak temperature) of from 0.6 to 1.3. The crystalline polyester can be used as a resin binder for a toner used for developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method, and the like.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: February 14, 2006
    Assignee: Kao Corporation
    Inventors: Eiji Shirai, Katsutoshi Aoki