Patents by Inventor Yuji Shintani

Yuji Shintani 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).

  • Binder-type carrier and two-component developer utilizing the carrier
    Publication number: 20020098437
    Abstract: The present invention relates to a binder-type carrier comprising a copolymer obtained by using an ethylenic unsaturated nitrile as its constituent monomer, an amino-modified silicone oil, and magnetic particles.
    Type: Application
    Filed: October 24, 2001
    Publication date: July 25, 2002
    Inventors: Makoto Kobayahsi, Tomoharu Nishikawa, Kochi Takenaka, Osamu Maeda, Hideaki Yasunaga, Yuji Shintani
  • Toner for developing electrostatic latent image and manufacturing method thereof
    Patent number: 6235444
    Abstract: The present invention relates to toner comprising a binder resin and a colorant, wherein the toner is manufactured by a wet-type granulation method using an organic dispersing agent, an aqueous extract liquid having a surface tension of 50 to 72 mN/m at 25° C., the aqueous extract liquid obtained by mixing 1 part-by-weight toner and 50 parts-by-weight distilled water for 1 hour at 80° C.
    Type: Grant
    Filed: January 4, 2000
    Date of Patent: May 22, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Yasuki Nagai, Junji Machida, Yuji Shintani, Mitsutoshi Nakamura
  • Developing method of electrostatic latent images for full color image formation
    Patent number: 5212039
    Abstract: This invention relates to a developing method for electrostatic latent images for developing the electrostatic latent images retained on an electrostatic latent image retaining member, comprisinga step of supplying a specified developer;a step of transferring the developer to a developing area; anda step of developing the electrostatic latent images formed on the electrostatic latent image retaining member in the development area under a specified development bias voltage.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: May 18, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Ichiro Demizu, Mitsutoshi Nakamura, Hiroshi Fukao, Yuji Shintani, Shinobu Nakasawa
  • Carrier for developing electrostatic latent image
    Patent number: 5204204
    Abstract: This invention relates to a carrier for developing electrostatic latent images comprising;carrier core particles having specified physical properties such as mean particle size, a bulk density, ratio of small particles, surface area index and the like, andresin-coating layers formed of specified components at specified content by a sintering process so that the layer resin may have specified physical properties such as ratio of integrated intensity and the like.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: April 20, 1993
    Assignees: Minolta Camera Kabushiki Kaisha, Powdertech Co., Ltd.
    Inventors: Yuji Shintani, Etsuaki Urano, Osamu Doi, Shinobu Nakasawa, Ichiro Demizu, Miyoko Ito, Kazuhiro Itadaki, Nobutaka Torii, Yukio Tanigami, Toshio Honjo, Yuji Sato, Toshiyuki Fukumoto
  • Photosensitive member for electrophotography comprising specified nylon copolymer
    Patent number: 5124219
    Abstract: This invention relates to a photosensitive member for electrophotography with a photoconductive layer on an electrically conductive substrate and a surface protective layer on the photoconductive layer, wherein the surface protective layer comprises a ternary polymer of nylon or a multicomponent polymer of nylon having 10% or less in saturated degree of water absorption under 65% of relative humidity at 24.degree. C. The surface protective layer may have protuberances and hollows thereon. The surface protective layer may further comprises an inorganic layer on the photoconductive layer.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: June 23, 1992
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Yuji Shintani, Tetsuo Kyogoku, Toshikazu Suzuki, Masamitsu Ishiyama
  • Photosensitive member with intermediate layer of high polymer resin
    Patent number: 5049466
    Abstract: The disclosure relates to a photosensitive member comprising an electrically conductive substrate, a photoconductive layer of a ceramic material, an intermediate layer of an organic high polymer formed on the photoconductive layer and having a thickness of about 0.01 to about 1 micron and an overcoat layer of a ceramic material formed on the intermediate layer. The intermediate layer has a volume resistivity smaller than that of the overcoat layer.
    Type: Grant
    Filed: January 24, 1989
    Date of Patent: September 17, 1991
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Tetsuo Kyogoku, Yuji Shintani