Patents by Inventor Kunihiko Iwasaki

Kunihiko Iwasaki 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: 20240118633
    Abstract: An electrophotographic photosensitive member including: a support, a charge generating layer, and a charge transporting layer in this order, wherein the charge transporting layer contains: a compound represented by the formula (A-1), and at least one selected from the group consisting of a compound represented by the formula (A-2) and a compound represented by the formula (A-3).
    Type: Application
    Filed: September 8, 2023
    Publication date: April 11, 2024
    Inventors: TATSUYA OHSAWA, KUNIHIKO SEKIDO, SHUHEI IWASAKI, NAOYUKI MATSUMOTO
  • Publication number: 20240118655
    Abstract: An object of the present disclosure is to provide an electrophotographic photosensitive member with suppressed positive ghosts, and a process cartridge and an electrophotographic apparatus each including the electrophotographic photosensitive member. The present disclosure provides an electrophotographic photosensitive member having a support and a photosensitive layer on the support; the photosensitive layer comprises (?) a compound represented by the formula (1), and (?) at least one selected from the group consisting of a compound represented by the formula (2) and a compound represented by the formula (3), wherein a content of the (?) with respect to a content of the (?) is 50 to 850 mass ppm in the photosensitive layer.
    Type: Application
    Filed: September 8, 2023
    Publication date: April 11, 2024
    Inventors: KUNIHIKO SEKIDO, SHUHEI IWASAKI, TATSUYA OHSAWA, NAOYUKI MATSUMOTO, ATSUSHI OKUDA, TSUTOMU NISHIDA
  • Publication number: 20240111224
    Abstract: An object of the present disclosure is to provide an electrophotographic photosensitive member which can suppress the potential fluctuation due to repeated use even with the electrophotographic apparatus of high printing process speed. The present disclosure provides an electrophotographic photosensitive member comprising: a support, a charge generating layer, and a charge transporting layer in this order, wherein the charge transporting layer comprises: (?) a compound represented by the formula (C-1), and (?) at least one selected from the group consisting of a compound represented by the following formula (C-2) and a compound represented by the formula (C-3), wherein a content of the (?) in the charge transporting layer with respect to a total mass of the charge transporting layer is 250 to 610 mass ppm.
    Type: Application
    Filed: September 8, 2023
    Publication date: April 4, 2024
    Inventors: SHUHEI IWASAKI, KUNIHIKO SEKIDO, TATSUYA OHSAWA, NAOYUKI MATSUMOTO
  • Patent number: 6740428
    Abstract: In a slide member comprising a base member and a slide layer including a first surface fixed to the base member and a second surface being opposite to the first surface in a thickness direction of the slide layer and capable of contacting another member in such a manner that the another member is movable on the second surface, the slide layer includes silver as a main component of the slide layer and a solid lubricant.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: May 25, 2004
    Assignee: Daido Metal Company Ltd.
    Inventors: Akinori Norito, Toshiaki Kawachi, Hideo Ishikawa, Takayuki Shibayama, Kunihiko Iwasaki, Cristian Petrica Lungu
  • Publication number: 20030180572
    Abstract: In a slide member comprising a base member and a slide layer including a first surface fixed to the base member and a second surface being opposite to the first surface in a thickness direction of the slide layer and capable of contacting another member in such a manner that the another member is movable on the second surface, the slide layer includes silver as a main component of the slide layer and a solid lubricant.
    Type: Application
    Filed: March 6, 2003
    Publication date: September 25, 2003
    Applicant: Daido Metal Company Ltd.
    Inventors: Akinori Norito, Toshiaki Kawachi, Hideo Ishikawa, Takayuki Shibayama, Kunihiko Iwasaki, Cristian Petrica Lungu