Patents by Inventor Kanzirou Kawasaki

Kanzirou Kawasaki 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: 4740494
    Abstract: This invention relates to a method of recording an image, characterized by superposing a heat-sensitive transfer medium on a plain paper and heating the medium thereby transferring a leuco dye from a leuco dye-containing transfer layer and a developer from a developer-containing transfer layer respectively onto the plain paper to react the leuco dye and the developer, said heat-sensitive transfer medium being prepared by having a transfer layer containing a leuco dye as the main component and a transfer layer containing a developer as the main component respectively applied on a single substrate or two separate substrates.
    Type: Grant
    Filed: November 5, 1984
    Date of Patent: April 26, 1988
    Assignee: Ricoh Co., Ltd.
    Inventors: Hideo Watanabe, Keishi Kubo, Kanzirou Kawasaki, Minoru Hakiri, Nobuhiro Takigawa
  • Patent number: 4538164
    Abstract: This invention relates to a heat-sensitive transfer medium comprising a transfer sheet having a transfer layer containing a leuco dye as the main component and a receiving sheet having a receiving layer containing a developer for said leuco dye as the main component, characterized in that said receiving layer contains porous filler having an oil absorption amount of at least 50 ml/100 g and a phenolic compound expressed by the general formula, ##STR1## wherein R represents an alkylene group and X represents hydrogen or a halogen atom.
    Type: Grant
    Filed: November 28, 1984
    Date of Patent: August 27, 1985
    Assignee: Ricoh Co., Ltd.
    Inventors: Nobuhiro Takigawa, Hideo Watanabe, Kanzirou Kawasaki, Keishi Kubo, Minoru Hakiri, Eiichi Kawamura