Patents by Inventor Atsushi Sasai

Atsushi Sasai 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 and developer
    Patent number: 11226570
    Abstract: A toner comprising a binder resin and a release agent is provided. When the toner is subjected to a FTIR-ATR mapping within a measurement range in a 50 ?m square, divided in 1,024 pixels each in a 1.56 ?m square, an average value of an intensity ratio of an absorption spectrum peak at a wavenumber of 2850 cm?1 to an absorption spectrum peak at a wavenumber of 828 cm?1 in each of the pixels is from 0.10 to 0.19, and a proportion of pixels in which the intensity ratio is 0.20 or higher to all the pixels is from 5% to 10%.
    Type: Grant
    Filed: June 12, 2020
    Date of Patent: January 18, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Kohei Hayasaka, Tohru Moriya, Yousuke Suzuki, Atsushi Sasai, Kazuki Washizu
  • TONER AND DEVELOPER
    Publication number: 20200401061
    Abstract: A toner comprising a binder resin and a release agent is provided. When the toner is subjected to a FTIR-ATR mapping within a measurement range in a 50 ?m square, divided in 1,024 pixels each in a 1.56 ?m square, an average value of an intensity ratio of an absorption spectrum peak at a wavenumber of 2850 cm?1 to an absorption spectrum peak at a wavenumber of 828 cm?1 in each of the pixels is from 0.10 to 0.19, and a proportion of pixels in which the intensity ratio is 0.20 or higher to all the pixels is from 5% to 10%.
    Type: Application
    Filed: June 12, 2020
    Publication date: December 24, 2020
    Inventors: Kohei Hayasaka, Tohru Moriya, Yousuke Suzuki, Atsushi Sasai, Kazuki Washizu