Patents by Inventor Tatsuyoshi Ishii

Tatsuyoshi Ishii 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).

  • Resin for toner binder and toner composition
    Patent number: 7585921
    Abstract: The present invention provides a resin for toner binders, which comprises two polyester resins (A) and (B), said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester resin (a) and a polyepoxide (c) and said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester resin (b) and an acid anhydride (r).
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: September 8, 2009
    Assignee: Sanyo Chemical Industries, Ltd.
    Inventors: Hiroshi Kishiki, Naoki Takase, Syuji Yamada, Tatsuyoshi Ishii
  • Resin for toner binder and toner composition
    Publication number: 20050064313
    Abstract: The present invention provides a resin for toner binders, which comprises two polyester resins (A) and (B), said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester resin (a) and a polyepoxide (c) and said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester resin (b) and an acid anhydride (r).
    Type: Application
    Filed: December 16, 2002
    Publication date: March 24, 2005
    Inventors: Hiroshi Kishiki, Naoki Takase, Syuji Yamada, Tatsuyoshi Ishii