Patents by Inventor Tohru Tsuruhara

Tohru Tsuruhara 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
  • Patent number: 7342062
    Abstract: Monoazo metal complex compound containing composition, the incidence of skin sensitization in a skin sensitization potential test based on the maximization method of said composition being not more than 20% and method for producing said composition which comprises a step for removing impurity substances using an alcoholic organic solvent; charge control agent comprising said composition and toner containing said charge control agent; coloring agent containing said composition and colored thermoplastic resin composition containing said coloring agent.
    Type: Grant
    Filed: November 12, 2003
    Date of Patent: March 11, 2008
    Assignee: Orient Chemical Industries, Ltd
    Inventors: Akihiro Tada, 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: 20040097618
    Abstract: Monoazo metal complex compound containing composition, the incidence of skin sensitization in a skin sensitization potential test based on the maximization method of said composition being not more than 20% and method for producing said composition which comprises a step for removing impurity substances using an alcoholic organic solvent; charge control agent comprising said composition and toner containing said charge control agent; coloring agent containing said composition and colored thermoplastic resin composition containing said coloring agent.
    Type: Application
    Filed: November 12, 2003
    Publication date: May 20, 2004
    Applicant: Orient Chemical Industries, Ltd.
    Inventors: Akihiro Tada, Tohru Tsuruhara
  • 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
  • Patent number: 6399681
    Abstract: A colored thermoplastic resin composition comprising a crystalline thermoplastic resin containing a black dye or a black dye and a fibrous reinforcing material, wherein said black dye is a black dye obtainable by a reaction of one or more anionic surfactants selected from the group consisting of (a) to (d) below and nigrosine, and wherein the crystallizing temperature is lower than that of the original thermoplastic resin containing no black dye, (a) a sulfuric acid ester surfactant (b) a phosphoric acid ester surfactant (c) a sulfonic acid surfactant (d) a carboxylic acid surfactant.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: June 4, 2002
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Tohru Tsuruhara, Akihiko Hayashi, Hiroshi Takeuchi
  • Publication number: 20020004588
    Abstract: Monoazo metal complex compound containing composition, the incidence of skin sensitization in a skin sensitization potential test based on the maximization method of said composition being not more than 20% and method for producing said composition which comprises a step for removing impurity substances using an alcoholic organic solvent; charge control agent comprising said composition and toner containing said charge control agent; coloring agent containing said composition and colored thermoplastic resin composition containing said coloring agent.
    Type: Application
    Filed: May 31, 2001
    Publication date: January 10, 2002
    Inventors: Akihiro Tada, Tohru Tsuruhara
  • Patent number: 6153735
    Abstract: Monoazo metal compound of formula [I] which is excellent in charge control or charge-enhancing property, and toner for developing electrostatic images and powdery paint for electrostatic painting incorporating thereof:D.sub.3 (Met).sub.2 [I]D is a ligand based on a monoazo compound of formula [II] or [III], Met is a metal atom, and the 3 molecules of D are coordinated to the 2 atoms of Met: ##STR1## R.sup.1 -R.sup.10, and R.sup.21 -R.sup.28 are each H, halogen, nitro, alkyl or haloalkyl, aryl, aralkyl, --SO.sub.2 N(R.sup.11).sub.2 (R.sup.11 is H, alkyl, aryl, aralkyl), --N(R.sup.12).sub.2 (R.sup.12 is H, lower alkyl, aryl, aralkyl, acyl), --CONH(R.sup.13) (R.sup.13 is H, a lower alkyl, aryl, aralkyl); 2 or more of R.sup.1 -R.sup.10 and/or R.sup.21 -R.sup.28 may bind together to form an aromatic or aliphatic ring.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: November 28, 2000
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Kazuaki Sukata, Shuji Sugawara, Shun-ichiro Yamanaka, Tohru Tsuruhara, Masashi Yasumatsu
  • Patent number: 6060615
    Abstract: Positively-chargeable charge control agent and toner for developing electrostatic images that comprises a coloring agent, a resin for toners, and said positively-chargeable charge control agent. The positively-chargeable charge control agent comprises a metal complex salt or metal complex of an aromatic dicarboxylic acid having at least 1 perfluoroalkyl group, wherein the central atom of the metal complex salt or metal complex is a trivalent metal.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: May 9, 2000
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Tohru Tsuruhara, Kazuaki Sukata
  • Patent number: 5990332
    Abstract: Metal compound of formula [I] which is excellent in charge control or charge-enhancing property, and toner for developing electrostatic images and powdery paint for electrostatic painting incorporating thereof: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent a hydrogen, a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, and R.sup.3 and R.sup.4 may bind together to form an aromatic or aliphatic ring which may have one or more substituents of a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; M represents a metal; m represents an integer of 3 or more; n represents an integer of 2 or more.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: November 23, 1999
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Kazuaki Sukata, Tohru Tsuruhara, Shun-Ichiro Yamanaka, Shuji Sugawara, Masashi Yasumatsu
  • Patent number: 5981130
    Abstract: Positively-chargeable charge control agent and toner for developing electrostatic images that comprises a coloring agent, a resin for toners, and said positively-chargeable charge control agent. The positively-chargeable charge control agent comprises a metal complex salt or metal complex of an aromatic dicarboxylic acid having at least 1 perfluoroalkyl group, wherein the central atom of the metal complex salt or metal complex is a trivalent metal.
    Type: Grant
    Filed: May 29, 1998
    Date of Patent: November 9, 1999
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Tohru Tsuruhara, Kazuaki Sukata
  • Patent number: 5976749
    Abstract: Metal compound of formula [I] which is excellent in charge control or charge-enhancing property, and toner for developing electrostatic images and powdery paint for electrostatic painting incorporating thereof: ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 independently represent a hydrogen, a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, and R.sup.3 and R.sup.4 may bind together to form an aromatic or aliphatic ring which may have one or more substituents of a linear or branched alkyl group, or a linear or branched unsaturated alkyl group; M represents a metal; m represents an integer of 3 or more; n represents an integer of 2 or more.
    Type: Grant
    Filed: August 27, 1996
    Date of Patent: November 2, 1999
    Assignee: Orient Chemical Industries, Ltd
    Inventors: Kazuaki Sukata, Tohru Tsuruhara, Shun-ichiro Yamanaka, Shuji Sugawara, Masashi Yasumatsu
  • Patent number: 5843611
    Abstract: Monoazo metal compound of formula ?I! which is excellent in charge control or charge-enhancing property, and toner for developing electrostatic images and powdery paint for electrostatic painting incorporating thereof:D.sub.3 (Met).sub.2 ?I!D is a ligand based on a monoazo compound of formula ?II! or ?III!, Met is a metal atom, and the 3 molecules of D are coordinated to the 2 atoms of Met: ##STR1## R.sup.1 -R.sup.10 and R.sup.21 -R.sup.28 are each H, halogen, nitro, alkyl or haloalkyl, aryl, aralkyl, --SO.sub.2 N(R.sup.11).sub.2 (R.sup.11 is H, alkyl, aryl, aralkyl), --N(R.sup.12).sub.2 (R.sup.12 is H, lower alkyl, aryl, aralkyl, acyl), --CONH(R.sup.13) (R.sup.13 is H, a lower alkyl, aryl, aralkyl); 2 or more of R.sup.1 -R.sup.10 and/or R.sup.21 -R.sup.28 may bind together to form an aromatic or aliphatic ring.
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: December 1, 1998
    Assignee: Orient Chemical Industries, Ltd.
    Inventors: Kazuaki Sukata, Shuji Sugawara, Shun-ichiro Yamanaka, Tohru Tsuruhara, Masashi Yasumatsu