Patents by Inventor Hideo Ueda

Hideo Ueda 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).

  • Aromatic sulfonamide sulfonyl chloride compounds
    Patent number: 4235813
    Abstract: An aromatic sulfonamide sulfonyl chloride, useful as an intermediate in the preparation of cyan dye-releasing redox compounds for diffusion transfer photographic materials, represented by the following general formula (I) ##STR1## wherein A represents a divalent benzene nucleus or a divalent naphthalene nucleus, in which in each nucleus the bonding thereto is symmetrical, and a method for the synthesis thereof comprising reacting an aromatic disulfonyl chloride represented by the formula (IIa) or (IIb) ##STR2## wherein the two sulfonyl chloride groups are substituted at symmetrical positions on the benzene and the naphthylene ring, with 5-amino-1-naphthol.
    Type: Grant
    Filed: March 23, 1979
    Date of Patent: November 25, 1980
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideo Ueda, Hiroshi Sawaguchi
  • Aromatic sulfonamide sulfonyl chloride compounds
    Patent number: 4176134
    Abstract: An aromatic sulfonamide sulfonyl chloride, useful as an intermediate in the preparation of cyan dye-releasing redox compounds for diffusion transfer photographic materials, represented by the following general formula (I) ##STR1## wherein A represents a divalent benzene nucleus or a divalent naphthalene nucleus, in which in each nucleus the bonding thereto is symmetrical, and a method for the synthesis thereof comprising reacting an aromatic disulfonyl chloride represented by the formula (IIa) or (IIb) ##STR2## wherein the two sulfonyl chloride groups are substituted at symmetrical positions on the benzene and the naphthylene ring, with 5-amino-1-naphthol.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: November 27, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideo Ueda, Hiroshi Sawaguchi