Patents by Inventor Yukiko Kamijo

Yukiko Kamijo 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: 9823598
    Abstract: A conductive member includes a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer. The surface layer contains a resin and insulating particles. The insulating particles account for 50% or more and 70% or less of an area of a cross-section of the surface layer taken in a thickness direction.
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: November 21, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yukiko Kamijo, Taketoshi Hoshizaki
  • Publication number: 20170277060
    Abstract: A conductive member includes a substrate, an elastic layer on the substrate, and a surface layer on the elastic layer. The surface layer contains a resin and insulating particles. The insulating particles account for 50% or more and 70% or less of an area of a cross-section of the surface layer taken in a thickness direction.
    Type: Application
    Filed: August 4, 2016
    Publication date: September 28, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukiko KAMIJO, Taketoshi HOSHIZAKI
  • Patent number: 9720343
    Abstract: A conductive member includes a substrate, an elastic layer formed on the substrate, and a surface layer formed on the elastic layer, wherein the surface layer has a sea-island structure that includes a sea portion at least containing a first resin and a conductive agent and island portions at least containing a second resin, the island portions have an average diameter of approximately at least 100 nm and not greater than 1/10 of the thickness of the surface layer, and the conductive agent contained in the sea portion is unevenly distributed in the vicinity of the interface of the sea portion with the island portions.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: August 1, 2017
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yukiko Kamijo, Taketoshi Hoshizaki, Hidemi Nukada
  • Publication number: 20170003616
    Abstract: A conductive member includes a substrate, an elastic layer formed on the substrate, and a surface layer formed on the elastic layer, wherein the surface layer has a sea-island structure that includes a sea portion at least containing a first resin and a conductive agent and island portions at least containing a second resin, the island portions have an average diameter of approximately at least 100 nm and not greater than 1/10 of the thickness of the surface layer, and the conductive agent contained in the sea portion is unevenly distributed in the vicinity of the interface of the sea portion with the island portions.
    Type: Application
    Filed: March 4, 2016
    Publication date: January 5, 2017
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Yukiko KAMIJO, Taketoshi HOSHIZAKI, Hidemi NUKADA
  • Patent number: 9335672
    Abstract: A tubular member includes a resin layer containing a thermoplastic resin and a conductive material, and the resin layer forming a sea part in which the thermoplastic resin becomes a matrix phase, wherein an area ratio of the sea part to a portion in a range of 5 ?m respectively to a front surface portion side and a rear surface portion side with a central portion of the resin layer in a thickness direction as a center is greater by 3% to 15% than a greater area ratio between an area ratio of the sea part to a portion in a range of 10 ?m from a front surface portion of the resin layer in the thickness direction and an area ratio of the sea part to a portion in a range of 10 ?m from a rear surface portion in the thickness direction.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: May 10, 2016
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Yukiko Kamijo, Kenji Omori
  • Publication number: 20160085184
    Abstract: A tubular member includes a resin layer containing a thermoplastic resin and a conductive material, and the resin layer forming a sea part in which the thermoplastic resin becomes a matrix phase, wherein an area ratio of the sea part to a portion in a range of 5 ?m respectively to a front surface portion side and a rear surface portion side with a central portion of the resin layer in a thickness direction as a center is greater by 3% to 15% than a greater area ratio between an area ratio of the sea part to a portion in a range of 10 ?m from a front surface portion of the resin layer in the thickness direction and an area ratio of the sea part to a portion in a range of 10 ?m from a rear surface portion in the thickness direction.
    Type: Application
    Filed: February 5, 2015
    Publication date: March 24, 2016
    Inventors: Yukiko KAMIJO, Kenji OMORI
  • Patent number: 7968264
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer that includes a phthalocyanine pigment, a charge-transporting substance and at least one kind of lignophenol derivative.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: June 28, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Yukiko Kamijo
  • Publication number: 20080261136
    Abstract: An electrophotographic photoreceptor includes a conductive substrate; and a photosensitive layer that includes a phthalocyanine pigment, a charge-transporting substance and at least one kind of lignophenol derivative.
    Type: Application
    Filed: March 5, 2008
    Publication date: October 23, 2008
    Applicant: FUJI XEROX CO., LTD
    Inventors: Kazuya Hongo, Yukiko Kamijo
  • Patent number: 7381512
    Abstract: A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: June 3, 2008
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Kozo Ota, Masahiko Miyamoto, Yukiko Kamijo, Hidemi Nukada, Kenji Inoue
  • Publication number: 20050100806
    Abstract: A hydroxygallium phthalocyanine pigment is characterized by having a maximum peak wavelength within a range of from 810 nm to 839 nm in optical absorption spectrum in a wavelength range of from 600 nm to 900 nm.
    Type: Application
    Filed: August 30, 2004
    Publication date: May 12, 2005
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Kazuya Hongo, Kozo Ota, Masahiko Miyamoto, Yukiko Kamijo, Hidemi Nukada, Kenji Inoue
  • Patent number: 6773857
    Abstract: An electrophotographic photoreceptor having, between an electroconductive substrate and a photosensitive layer, an interlayer which contains fine metal oxide particles and a binder resin and which, when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH, has a volume resistivity of from 108 to 1013 &OHgr;·cm and, when an electric field of 106 V/m is applied thereto at 15° C. and 15% RH, has a volume resistivity which is up to 500 times the volume resistivity thereof as measured when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH.
    Type: Grant
    Filed: October 8, 2002
    Date of Patent: August 10, 2004
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Hirofumi Nakamura, Ichiro Takegawa, Hidemi Nukada, Masahiro Iwasaki, Michiko Aida, Yukiko Kamijo, Masahiko Miyamoto, Tetsuya Ezumi, Takashi Yamada, Koji Bando, Taketoshi Hoshizaki
  • Publication number: 20030118927
    Abstract: An electrophotographic photoreceptor having, between an electroconductive substrate and a photosensitive layer, an interlayer which contains fine metal oxide particles and a binder resin and which, when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH, has a volume resistivity of from 108 to 1013 &OHgr;·cm and, when an electric field of 106 V/m is applied thereto at 15° C. and 15% RH, has a volume resistivity which is up to 500 times the volume resistivity thereof as measured when an electric field of 106 V/m is applied thereto at 28° C. and 85% RH.
    Type: Application
    Filed: October 8, 2002
    Publication date: June 26, 2003
    Applicant: FUJI XEROX CO., LTD.
    Inventors: Hirofumi Nakamura, Ichiro Takegawa, Hidemi Nukada, Masahiro Iwasaki, Michiko Aida, Yukiko Kamijo, Masahiko Miyamoto, Tetsuya Ezumi, Takashi Yamada, Koji Bando, Taketoshi Hoshizaki