Patents by Inventor Shinobu Nakasawa

Shinobu Nakasawa 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).

  • Toner for developing electrostatic latent images
    Patent number: 5272040
    Abstract: The present invention relates to a toner for developing electrostatic latent images which has silica and titania or alumina on the toner surface at specified ratio or in specified states, so that environmental stability in chargeability and stable copy images with fine texture can be obtained.
    Type: Grant
    Filed: March 27, 1992
    Date of Patent: December 21, 1993
    Assignee: Minolta Camera Kabushiki Kaisha
    Inventors: Shinobu Nakasawa, Hiroshi Fukao, Keiji Asakawa, Toshikazu Muramatsu, Ichiro Demizu
  • 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