Patents by Inventor Shinji Takagi

Shinji Takagi 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).

  • Publication number: 20190361365
    Abstract: Provided is an electrophotographic photosensitive member that suppresses image smearing at the time of its repeated use, and expresses satisfactory wear resistance and electric characteristics. The electrophotographic photosensitive member includes a support and a photosensitive layer in the stated order, wherein a surface layer of the electrophotographic photosensitive member contains a copolymer of a hole-transportable compound having a chain-polymerizable functional group and a specific compound having maleimide groups.
    Type: Application
    Filed: May 20, 2019
    Publication date: November 28, 2019
    Inventors: Haruki Mori, Koichi Nakata, Masaki Nonaka, Shinji Takagi
  • Patent number: 10488771
    Abstract: A surface layer of an electrophotographic photosensitive member contains a cured product of a composition containing a hole transport compound having an acryloyloxy group or a methacryloyloxy group, and a compound having a specific structure.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: November 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Haruki Mori, Masaki Nonaka, Koichi Nakata, Shinji Takagi
  • Patent number: 10488769
    Abstract: Provided is an electrophotographic photosensitive member, wherein a surface layer of the electrophotographic photosensitive member contains a copolymer of a hole-transportable compound having a polymerizable functional group and a compound represented by the following general formula (1).
    Type: Grant
    Filed: August 13, 2018
    Date of Patent: November 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Haruki Mori, Masaki Nonaka, Shubun Kujirai
  • Patent number: 10451984
    Abstract: A coating film of a coating liquid for a surface layer, the coating liquid containing a hole transporting compound having a chain-polymerizable functional group and a compound having a specified structure, is cured to thereby form a surface layer of an electrophotographic photosensitive member.
    Type: Grant
    Filed: May 3, 2018
    Date of Patent: October 22, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Haruki Mori, Masaki Nonaka, Shinji Takagi, Koichi Nakata
  • Patent number: 10393963
    Abstract: A composition for an optical waveguide is cured into a sheet to give a cured product. A difference in light transmittance with respect to light having a wavelength of 450 nm is 15% or less between this cured product and this cured product after retention in atmosphere at 175° C. for 40 hours, the light transmittance being calculated in terms of the cured product at a thickness of 50 ?m.
    Type: Grant
    Filed: February 12, 2019
    Date of Patent: August 27, 2019
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naoyuki Kondou, Shinji Hashimoto, Toru Nakashiba, Shingo Maeda, Seiji Takagi
  • Publication number: 20190212495
    Abstract: A composition for an optical waveguide is cured into a sheet to give a cured product. A difference in light transmittance with respect to light having a wavelength of 450 nm is 15% or less between this cured product and this cured product after retention in atmosphere at 175° C. for 40 hours, the light transmittance being calculated in terms of the cured product at a thickness of 50 ?m.
    Type: Application
    Filed: February 12, 2019
    Publication date: July 11, 2019
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naoyuki KONDOU, Shinji HASHIMOTO, Toru NAKASHIBA, Shingo MAEDA, Seiji TAKAGI
  • Patent number: 10313974
    Abstract: A base station includes a wakeup signal transmission part transmitting transmission signal information to a wireless terminal by wireless communication. The transmission signal information includes a wakeup signal starting a given function included by the wireless terminal. The wakeup signal transmission part transmits the transmission signal information including connection information in addition to the wakeup signal to the wireless terminal. The connection information is information for causing the wireless terminal of a destination of transmission of the wakeup signal to connect by wireless communication using the given function.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: June 4, 2019
    Assignees: NEC COMMUNICATION SYSTEMS, LTD., NEC CORPORATION
    Inventors: Yukihiro Hara, Yohei Miyama, Tomonori Kumagai, Shinji Masuda, Kenki Takagi
  • Patent number: 10310395
    Abstract: Provided are an electrophotographic photosensitive member capable of satisfying abrasion resistance and electrical properties and suppressing image deletion, and an electrophotographic apparatus and a process cartridge having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member contains a polymer of a hole transport material having a polymerizable functional group, wherein the hole transport material has a specific structure.
    Type: Grant
    Filed: June 7, 2018
    Date of Patent: June 4, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Haruki Mori, Shinji Takagi, Masaki Nonaka, Ryoichi Tokimitsu
  • Patent number: 10287968
    Abstract: An engine cooling system includes a coolant circuit, a multi-way valve, a relief route and a relief valve. The coolant circuit includes a first route and a second route into which the coolant circuit is branched off at a branched position. The first route passes through a radiator. The multi-way valve is provided at the branched position. The relief route sets a relief source to a portion downstream of a pump and upstream of the multi-way valve in the coolant circuit, sets a relief destination to a portion downstream of the radiator in the first route, and causes coolant to flow from the relief source to the relief destination so as to bypass the multi-way valve. The relief valve interrupts circulation of coolant through the relief route when the relief valve is closed, and permits circulation of coolant through the relief route when the relief valve is open.
    Type: Grant
    Filed: September 13, 2016
    Date of Patent: May 14, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Rihito Kaneko, Noboru Takagi, Isao Takagi, Naoya Kawamoto, Kenji Kimura, Shinji Yumi
  • Publication number: 20190094726
    Abstract: A surface layer of an electrophotographic photosensitive member contains a cured product of a composition containing a hole transport compound having an acryloyloxy group or a methacryloyloxy group, and a compound having a specific structure.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 28, 2019
    Inventors: Haruki Mori, Masaki Nonaka, Koichi Nakata, Shinji Takagi
  • Publication number: 20190056676
    Abstract: Provided is an electrophotographic photosensitive member, wherein a surface layer of the electrophotographic photosensitive member contains a copolymer of a hole-transportable compound having a polymerizable functional group and a compound represented by the following general formula (1).
    Type: Application
    Filed: August 13, 2018
    Publication date: February 21, 2019
    Inventors: Koichi Nakata, Shinji Takagi, Haruki Mori, Masaki Nonaka, Shubun Kujirai
  • Publication number: 20180335708
    Abstract: The present invention relates to an electrophotographic photosensitive member in which a surface layer contains a polymer of a hole transport material having a polymerizable functional group, and the hole transport material has a specific fluorene structure.
    Type: Application
    Filed: May 16, 2018
    Publication date: November 22, 2018
    Inventors: Koichi Nakata, Haruki Mori, Shinji Takagi, Koichi Suzuki, Ryuji Higashi, Isao Kawata, Hajime Muta, Yuto Ito, Masaki Nonaka
  • Publication number: 20180329317
    Abstract: A coating film of a coating liquid for a surface layer, the coating liquid containing a hole transporting compound having a chain-polymerizable functional group and a compound having a specified structure, is cured to thereby form a surface layer of an electrophotographic photosensitive member.
    Type: Application
    Filed: May 3, 2018
    Publication date: November 15, 2018
    Inventors: Haruki Mori, Masaki Nonaka, Shinji Takagi, Koichi Nakata
  • Patent number: 10120331
    Abstract: The present invention provides a satisfactory electrophotographic photosensitive member which satisfies wear resistance and electrical properties and further, with which image defects do not occur, a process for producing an electrophotographic photosensitive member, and an electrophotographic apparatus and a process cartridge each including the electrophotographic photosensitive member. The electrophotographic photosensitive member the surface layer of which contains a copolymer of a polymerizable functional group-containing charge transporting substance and a particular polymerizable compound.
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: November 6, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Masaki Nonaka, Haruki Mori
  • Publication number: 20180284629
    Abstract: Provided are an electrophotographic photosensitive member capable of satisfying abrasion resistance and electrical properties and suppressing image deletion, and an electrophotographic apparatus and a process cartridge having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member contains a polymer of a hole transport material having a polymerizable functional group, wherein the hole transport material has a specific structure.
    Type: Application
    Filed: June 7, 2018
    Publication date: October 4, 2018
    Inventors: Koichi Nakata, Haruki Mori, Shinji Takagi, Masaki Nonaka, Ryoichi Tokimitsu
  • Patent number: 10067431
    Abstract: An electrophotographic photosensitive member, in which occurrences of image defects are suppressed, and a method for manufacturing the electrophotographic photosensitive member are provided. In addition, a process cartridge and an electrophotographic apparatus, which include the electrophotographic photosensitive member, are provided. The surface layer of the electrophotographic photosensitive member contains a cured material, and the cured material is a copolymer of a hole transport compound having a chain-polymerizable functional group and a vinyl ester compound containing a long-chain alkyl group.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: September 4, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Takagi, Masaki Nonaka, Haruki Mori, Ryoichi Tokimitsu, Koichi Nakata
  • Patent number: 10042272
    Abstract: To provide an electrophotographic photosensitive member being excellent in abrasion resistance and having good electrical characteristics. The surface layer of the electrophotographic photosensitive member contains a copolymerized product of a hole transporting compound having a specified structure and a compound having a specified structure.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: August 7, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Haruki Mori, Shinji Takagi, Masaki Nonaka, Koichi Nakata
  • Patent number: 9946175
    Abstract: To provide an electrophotographic photosensitive member which satisfies abrasion resistance and electrical properties and which is difficult to cause image deletion. A surface layer of the electrophotographic photosensitive member of this invention contains a polymerized product of a hole transporting compound having a polymerizable functional group, in which the hole transporting compound is at least one compound selected from the group consisting of: a compound consisting of one or more carbon atoms, one or more hydrogen atoms, and one or more halogen atoms; and a compound consisting of one or more carbon atoms, one or more hydrogen atoms, one or more oxygen atoms, and one or more halogen atoms.
    Type: Grant
    Filed: March 23, 2015
    Date of Patent: April 17, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koichi Nakata, Shinji Takagi, Yuzo Tokunaga, Masaki Nonaka, Ryoichi Tokimitsu
  • Publication number: 20170364025
    Abstract: The present invention provides a satisfactory electrophotographic photosensitive member which satisfies wear resistance and electrical properties and further, with which image defects do not occur, a process for producing an electrophotographic photosensitive member, and an electrophotographic apparatus and a process cartridge each including the electrophotographic photosensitive member. The electrophotographic photosensitive member the surface layer of which contains a copolymer of a polymerizable functional group-containing charge transporting substance and a particular polymerizable compound.
    Type: Application
    Filed: June 6, 2017
    Publication date: December 21, 2017
    Inventors: Koichi Nakata, Shinji Takagi, Masaki Nonaka, Haruki Mori
  • Patent number: 9829810
    Abstract: In an electrophotographic photosensitive member including a support and a photosensitive layer formed on the support, a surface layer of the electrophotographic photosensitive member contains a cured product obtained by copolymerizing at least one compound (i) selected from the group consisting of a triphenylamine compound having a hydroxymethyl group and a benzidine compound having a hydroxymethyl group, and at least one compound (ii) selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), a compound represented by the following formula (3), and a compound represented by the following formula (4):
    Type: Grant
    Filed: November 3, 2016
    Date of Patent: November 28, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaki Nonaka, Ryoichi Tokimitsu, Shinji Takagi, Koichi Nakata, Haruki Mori