Patents by Inventor Takehiko Ooi

Takehiko Ooi 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).

  • Light-transmitting recording material for electrophotography, and heat fixing method
    Patent number: 5853875
    Abstract: A light-transmitting recording material for electrophotography has a light-transmitting base material, a conductive undercoat layer formed on the light-transmitting base material, and a light-transmitting toner acceptable layer formed on the conductive undercoat layer. The surface resistivity of the conductive undercoat layer ranges from 1.times.10.sup.7 .OMEGA. to 1.times.10.sup.10 .OMEGA. at 20.degree. C. and 60% relative humidity. The conductive undercoat layer contains a metallic conductive or semiconductive material, and the light-transmitting toner acceptable layer includes a wax as a releasing agent and a thermoplastic resin. Also, a heat fixing method is provided in which a toner image is formed and heat-fixed on the above-mentioned light-transmitting recording material.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: December 29, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yomishi Toshida, Naoki Kushida, Takehiko Ooi, Hiroyuki Ogino
  • Dry process silver salt photosensitive material and image forming method making use of the dry process silver salt photosensitive material
    Patent number: 5543286
    Abstract: A dry process silver salt photosensitive material is disclosed which has a support and a photosensitive layer. The photosensitive layer contains at least a photosensitive silver halide or photosensitive silver halide forming component, an organic silver salt and a pyrrole compound. The photosensitive material has a broad latitude for heat development and can form images with a high contrast.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: August 6, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Ueno, Tetsuro Fukui, Motokazu Kobayashi, Takehiko Ooi, Kenji Kagami, Masao Suzuki, Katsuya Nishino
  • Heat developing photosensitive material and image formed by using the same
    Patent number: 5541055
    Abstract: A heat developing photosensitive material of the present invention has, on a substrate, a photosensitive layer containing at least an organic silver salt, a reducing agent, a photosensitive silver halide or a photosensitive silver halide forming agent, a cyanine dye and a cyclic carbonyl compound.In an image forming method of the present invention, an image is exposed on the heat developing photosensitive material and then the exposed photosensitive material is heated.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: July 30, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takehiko Ooi, Tetsuro Fukui, Motokazu Kobayashi, Kazunori Ueno
  • Heat developable photosensitive material and image forming method which uses the same
    Patent number: 5529889
    Abstract: A heat-developable photosensitive material including a photosensitive layer formed on a support, the photosensitive layer at least containing an organic silver salt, a reducing agent, either a photosensitive silver halide or a photosensitive silver halide forming agent, and a sensitizing dye of the following general formula (I): ##STR1## where r is hydrogen, halogen, substituted or unsubstituted alkyl, substituted or unsubstituted alkoxyl, substituted or unsubstituted aryl or substituted amino; r.sup.1 and r.sup.2 are each substituted or unsubstituted aryl or r.sup.1 and r.sup.2 are bonded to each other to form a condensed ring; r.sup.3, r.sup.4 and r.sup.5 are each hydrogen, substituted or unsubstituted alkyl, alkenyl, substituted or unsubstituted aryl, or substituted or unsubstituted aralkyl; X.sup.1 is oxygen, sulfur, carbon, nitrogen or selenium, wherein when X.sup.1 is carbon or nitrogen, then X.sup.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: June 25, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiromi Ueda, Tetsuro Fukui, Takehiko Ooi, Kenji Kagami, Masao Suzuki, Katsuya Nishino, Tetsuya Higuchi
  • Thermal developing photosensitive member and image forming method using the thermal developing photosensitive member
    Patent number: 5482814
    Abstract: A heat developing photosensitive member including: a photosensitive layer containing at least an organic silver salt, a reducing agent and a photosensitive silver halide or a photosensitive silver halide forming agent; and a supporting member for supporting the photosensitive layer thereon, wherein merocyanine dye having a structure in which a thiazole nucleus or selenazole nucleus and hydantoin nucleus, thiohydantoin nucleus or selenohydantoin nucleus are combined with each other by a combining group having a methine group is contained in the photosensitive layer.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: January 9, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takehiko Ooi, Tetsuro Fukui, Motokazu Kobayashi, Kazunori Ueno, Kenji Kagami, Masao Suzuki, Katsuya Nishino