Patents by Inventor Nobuyoshi Watanabe

Nobuyoshi Watanabe 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).

  • Patent number: 4497887
    Abstract: A thermal development type diazo copying material comprising a support material and a photosensitive layer formed on the support material, which photosensitive layer comprises a diazo compound, a coupling component and a thermo-fusible auxiliary coloring agent, and which coupling component is capsulated by a hydrophobic polymeric material with a softening point ranging from 50.degree. C. to 150.degree. C. selected from the group consisting of hydrophobic polyester resins, hydrophobic cellulose resins, hydrophobic polyamide resins and hydrophobic polyurethane resins.
    Type: Grant
    Filed: June 2, 1982
    Date of Patent: February 5, 1985
    Assignee: Ricoh Compay, Ltd.
    Inventors: Nobuyoshi Watanabe, Tsutomu Matsuda
  • Patent number: 4467024
    Abstract: A process for the production of a thermo-developable type diazo copying material which comprises the steps of adding a heat fusible color assistant having a melting point of 50.degree. to 150.degree. C. to at least one selected from the group consisting of (a) an aqueous dispersion A containing a diazonium salt and fine particles of a hydrophobic resin consisting of a polymer of vinyl chloride, vinylidene chloride, styrene, acrylic ester, mechacrylic ester or olefin or a copolymer containing at least one member of aforesaid monomers as the constitution unit or a mixture of said polymer with said copolymer and (b) an aqueous solution or dispersion B containing coupler; then applying these aqueous dispersion A and aqueous solution or dispersion B onto a substrate in the order named; and drying same.
    Type: Grant
    Filed: December 1, 1982
    Date of Patent: August 21, 1984
    Assignee: Ricoh Co., Ltd.
    Inventors: Norio Kurisu, Tsutomu Matsuda, Hideo Watanabe, Nobuyoshi Watanabe
  • Patent number: 4290455
    Abstract: A reed valve in the form of a plate fixed at one end and bendable into and out of contact with a valve seat is operated by differential pressures and acts as a check-valve. The reed valve has cavities in the surface thereof with unitary strengthening frame members separating these cavities. Specific patterns of cavities and frame members are employed to achieve the desired performance of the valve.
    Type: Grant
    Filed: June 18, 1979
    Date of Patent: September 22, 1981
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Shoichi Honda, Nobuyoshi Watanabe
  • Patent number: 4119465
    Abstract: A method of manufacturing a diazo copying material for use in preparing a secondary original, which comprises coating a water-dispersible precoating liquid comprising a porous powder, a binding agent and an anionic surface active agent having the following general formula on a transparent or translucent support and drying thereafter, and subsequently coating a photosensitive liquid consisting essentially of a photosensitive diazonium salt on the precoated surface of said support and drying thereafter.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: October 10, 1978
    Assignee: Ricoh Co., Ltd.
    Inventors: Tsutomu Matsuda, Takeshi Maeda, Takeo Hirabayashi, Nobuyoshi Watanabe