Patents by Inventor Hitoshi Takimoto

Hitoshi Takimoto 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).

  • Chlorogalium phthalocyanine crystal and electrophotographic photoreceptor containing same
    Patent number: 5688619
    Abstract: In a process for producing a chlorogallium phthalocyanine crystal comprising mechanically dry-grinding chlorogallium phthalocyanine and subjected to crystal conversion, the weight ratio of chlorogallium phthalocyanine to the grinding media is set at a range of from 1/5 to 1/000. The resulting chlorogallium phthalocyanine crystal excels in the dispersibility in a binding resin and the stability in the dispersion.
    Type: Grant
    Filed: September 30, 1996
    Date of Patent: November 18, 1997
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Hitoshi Takimoto
  • Process for producing chlorogallium phthalocyanine crystal
    Patent number: 5588991
    Abstract: In a process for producing a chlorogallium phthalocyanine crystal comprising mechanically dry-grinding chlorogallium phthalocyanine and subjected to crystal conversion, the weight ratio of chlorogallium phthalocyanine to the grinding media is set at a range of from 1/5 to 1/1000. The resulting chlorogallium phthalocyanine crystal excels in the dispersibility in a binding resin and the stability in the dispersion.
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: December 31, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Hitoshi Takimoto
  • Gallium phthalocyanine halide crystals, method for preparing the same and electrophotographic photoreceptor using the same
    Patent number: 5510217
    Abstract: Gallium phthalocyanine halide crystals wherein a part of the crystals are changed into hydroxygallium phthalocyanine is disclosed. A method for preparing gallium phthalocyanine halide crystals wherein gallium phthalocyanine halide crystals are brought into contact with water and a part of the crystals are changed into hydroxygallium phthalocyanine is also disclosed. An electrophotographic photoreceptor formed by laminating at least a charge generating layer and a charge transporting layer successively on a conductive support wherein the charge generating layer contains gallium phthalocyanine halide crystals An which a part of the crystals are changed into hydroxygallium phthalocyanine is also disclosed.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: April 23, 1996
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Kazuya Hongo, Katsumi Nukada, Masakazu Iijima, Noriyoshi Takahashi, Masaaki Suwabe, Hitoshi Takimoto
  • High-frequency heating apparatus with wave guide switching means and selective power switching means for magnetron
    Patent number: 5451751
    Abstract: A high-frequency heating apparatus capable of heating uniformly a liquid load, having an economical wave guide switching unit and having a compact-sized and economical power circuit to drive a plurality of magnetrons. The high-frequency heating apparatus includes an excitation opening, provided at the bottom of a heating chamber for radiating microwaves to heat the liquid load in a container, a magnetron for generating the microwave to heat the object and a wave guide connected to a magnetron. The apparatus further includes a wave guide switching unity for switching the propagation of the microwave to one of plural wave guides. The switching unit includes a pair of circular conductive plates and a conductor disposed in the vicinity of a circumference of the circular conductive plate so as to shut off the microwave, wherein there is constructed a choke structure on the wave guide containing the circular conductive plates.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 19, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hitoshi Takimoto, Koji Murakami, Tatsuya Nakagawa