Patents by Inventor Takehiko Kinoshita

Takehiko Kinoshita 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: 7651828
    Abstract: A method for preparing an electrophotographic photoreceptor, includes coating an electroconductive substrate with an undercoat layer containing a blocked isocyanate compound, an oil-free alkyd resin including a hydroxyl group and basic amine; crosslinking the blocked isocyanate compound, oil-free alkyd resin including a hydroxyl group and basic amine; and coating the undercoat layer with a photosensitive layer.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: January 26, 2010
    Assignee: Ricoh Company, Ltd.
    Inventor: Takehiko Kinoshita
  • Publication number: 20090202937
    Abstract: A method for preparing an electrophotographic photoreceptor, includes coating an electroconductive substrate with an undercoat layer containing a blocked isocyanate compound, an oil-free alkyd resin including a hydroxyl group and basic amine; crosslinking the blocked isocyanate compound, oil-free alkyd resin including a hydroxyl group and basic amine; and coating the undercoat layer with a photosensitive layer.
    Type: Application
    Filed: February 18, 2009
    Publication date: August 13, 2009
    Inventor: Takehiko Kinoshita
  • Patent number: 7521161
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; an undercoat layer located overlying the electroconductive substrate; and a photosensitive layer located overlying the undercoat layer, wherein the undercoat layer comprises a blocked isocyanate compound and a basic amine.
    Type: Grant
    Filed: December 6, 2004
    Date of Patent: April 21, 2009
    Assignee: Ricoh Company, Ltd.
    Inventor: Takehiko Kinoshita
  • Patent number: 7507511
    Abstract: An electrophotographic photoreceptor, including: an electroconductive substrate; a first undercoat layer including no metal oxide, located overlying the electroconductive substrate; a second undercoat layer including a metal oxide and a binder resin, located overlying the first undercoat layer; and a photosensitive layer located overlying the second undercoat layer, wherein the metal oxide included in the second undercoat layer has a specific resistivity not less than 107 ?·cm and a block isocyanate compound.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: March 24, 2009
    Assignee: Ricoh Company Ltd.
    Inventors: Nozomu Tamoto, Tatsuya Niimi, Maiko Koeda, Tetsuro Suzuki, Takehiko Kinoshita, Suzuka Nozoe, Katsuichi Ohta
  • Publication number: 20080199218
    Abstract: An electrophotographic photoreceptor including an electroconductive substrate, and a photosensitive layer formed overlying one side of the electroconductive substrate, wherein the photosensitive layer includes at least two charge generation materials which have spectral sensitivity in a different wavelength region, and wherein the photosensitive layer further includes an organic sulfur-containing compound.
    Type: Application
    Filed: April 16, 2008
    Publication date: August 21, 2008
    Inventors: Yasuo Suzuki, Jun Aoto, Takehiko Kinoshita
  • Patent number: 7351507
    Abstract: An electrophotographic photoreceptor and image processing method, the photoreceptor including an electroconductive substrate; an undercoat layer overlying the electroconductive substrate; and a photosensitive layer overlying the undercoat layer, wherein the undercoat layer includes a titanium oxide; an oil-free alkyd resin; a block isocyanate compound; and a metal oxide different from the titanium oxide, having an average particle diameter smaller than an average particle diameter thereof.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 1, 2008
    Assignee: Ricoh Company, Limited
    Inventors: Suzuka Nozoe, Takehiko Kinoshita
  • Patent number: 7288349
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: October 30, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Publication number: 20060177749
    Abstract: An electrophotographic photoreceptor, including: an electroconductive substrate; a first undercoat layer including no metal oxide, located overlying the electroconductive substrate; a second undercoat layer including a metal oxide and a binder resin, located overlying the first undercoat layer; and a photosensitive layer located overlying the second undercoat layer, wherein the metal oxide included in the second undercoat layer has a specific resistivity not less than 107 ?·cm and a block isocyanate compound.
    Type: Application
    Filed: January 17, 2006
    Publication date: August 10, 2006
    Inventors: Nozomu Tamoto, Tatsuya Niimi, Maiko Koeda, Tetsuro Suzuki, Takehiko Kinoshita, Suzuka Nozoe, Katsuichi Ohta
  • Publication number: 20060127795
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Application
    Filed: January 23, 2006
    Publication date: June 15, 2006
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Patent number: 7022451
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming-apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Grant
    Filed: December 22, 2004
    Date of Patent: April 4, 2006
    Assignee: Ricoh Company, Ltd.
    Inventor: Takehiko Kinoshita
  • Publication number: 20050123846
    Abstract: An electrophotographic photoreceptor, including an electroconductive substrate; an undercoat layer located overlying the electroconductive substrate; and a photosensitive layer located overlying the undercoat layer, wherein the undercoat layer comprises a blocked isocyanate compound and a basic amine.
    Type: Application
    Filed: December 6, 2004
    Publication date: June 9, 2005
    Inventor: Takehiko Kinoshita
  • Publication number: 20050112484
    Abstract: An electrophotographic photoreceptor and image processing method, the photoreceptor including an electroconductive substrate; an undercoat layer overlying the electroconductive substrate; and a photosensitive layer overlying the undercoat layer, wherein the undercoat layer includes a titanium oxide; an oil-free alkyd resin; a block isocyanate compound; and a metal oxide different from the titanium oxide, having an average particle diameter smaller than an average particle diameter thereof.
    Type: Application
    Filed: September 15, 2004
    Publication date: May 26, 2005
    Inventors: Suzuka Nozoe, Takehiko Kinoshita
  • Publication number: 20050112288
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming-apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Application
    Filed: December 22, 2004
    Publication date: May 26, 2005
    Inventor: Takehiko Kinoshita
  • Patent number: 6852166
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: February 8, 2005
    Assignee: Ricoh Company, Ltd.
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Publication number: 20020150832
    Abstract: A method of coating a photoconductive element for an electrophotographic image forming apparatus and an apparatus therefore are disclosed. A plurality of cylindrical bodies are immersed in a bath, which stores a coating liquid, at the same time and then lifted out of the bath. As a result, a photoconductive film is formed on each cylindrical body.
    Type: Application
    Filed: March 1, 2002
    Publication date: October 17, 2002
    Inventors: Takehiko Kinoshita, Tatsuya Kubota, Akihiko Matuyama
  • Patent number: 6136483
    Abstract: An electrophotographic photoconductor including an electroconductive substrate, and a charge generating layer including a charge generating material and a charge transporting layer including a charge transporting material, which are overlaid and which are formed overlying one side of the electroconductive substrate, wherein the charge generating material includes an asymmetric disazo pigment and a metal-free phthalocyanine pigment, and wherein a ratio of the asymmetric disazo pigment to the metal-free phthalocyanine pigment is from 1.5:1 to 5:1 by weight and the asymmetric disazo pigment has the following formula (I):Cp1--N.dbd.N--A--N.dbd.N--Cp2 (I)wherein A represents a divalent group which is connected to each nitrogen atom of the adjacent azo groups through a carbon atom of said A group; and Cp1 and Cp2 independently represents a residual group of a coupler, wherein Cp1 is different from Cp2.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: October 24, 2000
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuo Suzuki, Jun Aoto, Takehiko Kinoshita
  • Patent number: 6026262
    Abstract: An image forming apparatus has a charging unit, an image exposure unit, a reversal development unit, an image transfer unit, and an electrophotographic photoconductor including an electroconductive support and a photoconductive layer formed thereon, the photoconductive layer being provided by coating and drying a photoconductive layer formation liquid containing a solvent, with a change in the content of the solvent in the photoconductive layer dried being 10% or less 24 hours after the drying thereof.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: February 15, 2000
    Assignee: Ricoh Company, Ltd.
    Inventors: Takehiko Kinoshita, Yasuo Suzuki
  • Patent number: 5417269
    Abstract: A pneumatic tire for heavy vehicle comprises first platforms bent at bent sections of a main groove extending zigzag in a circumferential direction of the tire, a second platform linearly extending between one of the first platforms and another of the first platforms, and a third platform extending between the one of the first platforms and the second platform, wherein the first, second, and third platforms are arranged at a bottom of the main groove within half a pitch of the main groove, a length of the first platform in the circumferential direction of the tire, a length of the second platform in the circumferential direction of the tire, and a length from one end of the one of the first platforms to one end of the another of the first platforms are different from each other; a length of the one of the first platforms is larger than the length of the second platform, and a width of each of the first and second platforms in an axial direction orthogonal to the circumferential direction of the tire and a hei
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: May 23, 1995
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventors: Takehiko Kinoshita, Yoshiyuki Takada
  • Patent number: D374200
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: October 1, 1996
    Assignee: Sumitomo Rubber Industries, Ltd.
    Inventor: Takehiko Kinoshita
  • Patent number: D956000
    Type: Grant
    Filed: November 29, 2019
    Date of Patent: June 28, 2022
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroyuki Kato, Shinichi Kato, Masashi Tsuru, Kenji Chimata, Yutaka Kinoshita, Koki Uchiyama, Tadashi Yato, Takahiro Kobayashi, Kota Araki, Takehiko Kawamura