Patents by Inventor Akihide Isoda

Akihide Isoda 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: 7829733
    Abstract: Charge control resin particles comprising a mixture of at least a charge control agent and a resin, wherein a crystalline zinc 3,5-di-tert-butylsalicylate represented by General Formula below, and having major peaks of X-ray diffraction using the CuK?-characteristic X-ray at Bragg angles 2? of at least 6.4±0.2° and 15.4±0.2°, is contained as said charge control agent. Toner for developing electrostatic images which comprises a coloring agent, a binder resin for toner, and the charge control resin particles.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: November 9, 2010
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Publication number: 20090233219
    Abstract: Charge control resin particles comprising a mixture of at least a charge control agent and a resin, wherein a crystalline zinc 3,5-di-tert-butylsalicylate represented by General Formula below, and having major peaks of X-ray diffraction using the CuK?-characteristic X-ray at Bragg angles 2? of at least 6.4±0.2° and 15.4±0.2°, is contained as said charge control agent. Toner for developing electrostatic images which comprises a coloring agent, a binder resin for toner, and the charge control resin particles.
    Type: Application
    Filed: April 1, 2009
    Publication date: September 17, 2009
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Patent number: 7582787
    Abstract: Charge control agent whose active ingredient is a zinc compound of an alkylsalicylic acid derivative, the compound being a zincified alkylsalicylic acid derivative which is an alkylphenol derivative having a carboxyl group introduced thereto; Toner for developing electrostatic images, comprising said charge control agent, a coloring agent and a binder resin for toner; Charge control resin particles comprising solidified milled particles of a thermally kneaded mixture of at least said charge control agent and a resin.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: September 1, 2009
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Publication number: 20060292471
    Abstract: Charge control resin particles comprising a mixture of at least a charge control agent and a resin, wherein a crystalline zinc 3,5-di-tert-butylsalicylate represented by General Formula below, and having major peaks of X-ray diffraction using the CuK?-characteristic X-ray at Bragg angles 2? of at least 6.4±0.2° and 15.4±0.2°, is contained as said charge control agent. Toner for developing electrostatic images which comprises a coloring agent, a binder resin for toner, and the charge control resin particles.
    Type: Application
    Filed: June 27, 2006
    Publication date: December 28, 2006
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Publication number: 20050095520
    Abstract: A toner for electrostatic image development comprises components of a charge control agent, a binding resin, and colorant. The charge control agent is an aromatic-oxy-carboxylic acid iron-including compound. The toner has its particle size distribution with: a volume-average particle diameter (D50) ranging from 5 to 13 microns that is determined by a cumulative 50% volume particle diameter from a largest particle diameter, and a degree of particle size dispersion (D25/D75) ranging from 1.20 to 1.50 that is calculated by a cumulative 25% volume particle diameter (D25) and a cumulative 75% volume particle diameter (D75) as same as the above determined D50.
    Type: Application
    Filed: October 20, 2004
    Publication date: May 5, 2005
    Applicant: Orient Chemical Ind., Ltd.
    Inventors: Akihide Isoda, Heihachi Yushina
  • Patent number: 6762004
    Abstract: Charge control agent and toner for developing electrostatic images containing said charge control agent. The active ingredient of the charge control agent is a metal compound obtainable by reacting one or two or more molecules of a compound having a phenolic hydroxy group and one or two or more molecules of a metal alkoxide.
    Type: Grant
    Filed: September 11, 2002
    Date of Patent: July 13, 2004
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Shun-ichiro Yamanaka, Akihide Isoda
  • Publication number: 20030180642
    Abstract: Charge control agent whose active ingredient is a zinc compound of an alkylsalicylic acid derivative, the compound being a zincified alkylsalicylic acid derivative which is an alkylphenol derivative having a carboxyl group introduced thereto; Toner for developing electrostatic images, comprising said charge control agent, a coloring agent and a binder resin for toner; Charge control resin particles comprising solidified milled particles of a thermally kneaded mixture of at least said charge control agent and a resin.
    Type: Application
    Filed: December 12, 2002
    Publication date: September 25, 2003
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Publication number: 20030175607
    Abstract: Charge control resin particles comprising a mixture of at least a charge control agent and a resin, wherein a crystalline zinc 3,5-di-tert-butylsalicylate represented by General Formula below, and having major peaks of X-ray diffraction using the CuK &agr;-characteristic X-ray at Bragg angles 2&thgr; of at least 6.4±0.2° and 15.4±0.2°, is contained as said charge control agent. Toner for developing electrostatic images which comprises a coloring agent, a binder resin for toner, and the charge control resin particles.
    Type: Application
    Filed: December 11, 2002
    Publication date: September 18, 2003
    Inventors: Akihide Isoda, Tetsuji Kihara, Tohru Tsuruhara
  • Publication number: 20030104298
    Abstract: Charge control agent and toner for developing electrostatic images containing said charge control agent. The active ingredient of the charge control agent is a metal compound obtainable by reacting one or two or more molecules of a compound having a phenolic hydroxy group and one or two or more molecules of a metal alkoxide.
    Type: Application
    Filed: September 11, 2002
    Publication date: June 5, 2003
    Applicant: ORIENT CHEMICAL INDUSTRIES, LTD.
    Inventors: Shun-ichiro Yamanaka, Akihide Isoda
  • Patent number: 6534231
    Abstract: Charge control agent and toner for developing electrostatic images containing said charge control agent. The active ingredient of the charge control agent is a metal compound obtainable by reacting one or two or more molecules of a compound having a phenolic hydroxy group and one or two or more molecules of a metal alkoxide.
    Type: Grant
    Filed: September 21, 1999
    Date of Patent: March 18, 2003
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Shun-ichiro Yamanaka, Akihide Isoda