Patents by Inventor Kumiko Fujiwara

Kumiko Fujiwara 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).

  • Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, and image-forming apparatus
    Patent number: 8530123
    Abstract: The invention provides an electrophotographic photoreceptor for use in an image-forming apparatus comprising a charging unit which charges an electrophotographic photoreceptor, an exposure unit which exposes the charged electrophotographic photoreceptor to light to form an electrostatic latent image on the electrophotographic photoreceptor, and a developing unit which develops the electrostatic latent image, wherein the electrophotographic photoreceptor comprises a conductive substrate and a photosensitive layer and the photosensitive layer contains a compound represented by the following formula (1).
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: September 10, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kumiko Fujiwara, Teruyuki Mitsumori, Hiroaki Fujiwara
  • Electrophotographic photoreceptor, electrophotographic photoreceptor cartridge, and image-forming apparatus
    Patent number: 8450032
    Abstract: The invention provides an electrophotographic photoreceptor for use in an image-forming apparatus comprising a charging unit which charges an electrophotographic photoreceptor, an exposure unit which exposes the charged electrophotographic photoreceptor to light to form an electrostatic latent image on the electrophotographic photoreceptor, and a developing unit which develops the electrostatic latent image, wherein the electrophotographic photoreceptor comprises a conductive substrate and a photosensitive layer and the photosensitive layer contains a compound represented by the following formula (1).
    Type: Grant
    Filed: June 27, 2008
    Date of Patent: May 28, 2013
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kumiko Fujiwara, Teruyuki Mitsumori, Hiroaki Fujiwara
  • ELECTROPHOTOGRAPHIC PHOTORECEPTOR, ELECTROPHOTOGRAPHIC PHOTORECEPTOR CARTRIDGE, AND IMAGE-FORMING APPARATUS
    Publication number: 20100330474
    Abstract: Subjects for the invention are: to provide an electrophotographic photoreceptor which has excellent electrical characteristics and which, even when repeatedly used over long, can stably form high-quality satisfactory images having high resolution; and to provide an electrophotographic photoreceptor cartridge and an image-forming apparatus each employing the electrophotographic photoreceptor. The invention provides an electrophotographic photoreceptor for use in an image-forming apparatus comprising a charging unit which charges an electrophotographic photoreceptor, an exposure unit which exposes the charged electrophotographic photoreceptor to light to form an electrostatic latent image on the electrophotographic photoreceptor, and a developing unit which develops the electrostatic latent image, wherein the electrophotographic photoreceptor comprises a conductive substrate and a photosensitive layer and the photosensitive layer contains a compound represented by the following formula (1).
    Type: Application
    Filed: June 27, 2008
    Publication date: December 30, 2010
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Kumiko Fujiwara, Teruyuki Mitsumori, Hiroaki Fujiwara