Patents by Inventor Susumi Ikushima

Susumi Ikushima 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).

  • Method for producing toner for electrostatic development
    Patent number: 5637434
    Abstract: In a method for producing a toner for electrostatic development, a mixture of starting toner materials comprising at least a resin and a colorant is kneaded, extruded and cooled to obtain a toner material. The toner material is crushed and then pulverized by an impact pulverizer having a pulverizing section formed by disposing a stator having ridges of a triangular waveform at an inner surface thereof and a rotor having ridges of a triangular waveform at an outer surface thereof at a gap between the ridges of the stator and of the rotor.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 10, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Susumi Ikushima, Shingo Ishiyama, Sadaki Yagi, Hideaki Uchida