Patents by Inventor Kouji Tokitou

Kouji Tokitou 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: 4363871
    Abstract: A multi-layer light-sensitive photographic material comprising a support and a light-sensitive layer, which have a surface layer which does not adhere even under a high temperature and high humidity conditions when the front surface layer thereof is contacted with the other surface layer and which is hardly subject to scratching and free from the so-called "blooming" phenomenon.The light-sensitive material according to this invention comprises, in at least one of the front and back sides thereof, at least one light-insensitive layer containing a high polymer having at least 20% by weight of a repeating unit represented by the formula (I): ##STR1## wherein R.sup.1 represents a hydrogen atom or a methyl group, and R.sup.2 represents a straight chain alkyl group having 12 to 24 carbon atoms.
    Type: Grant
    Filed: April 27, 1981
    Date of Patent: December 14, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshiaki Shibue, Koichi Nagayasu, Tohru Kobayashi, Kouji Tokitou
  • Patent number: 4358533
    Abstract: A silver halide photographic material having a hydrophilic colloid layer comprising fine polymer particles loaded with a hydrophobic photographic addenda provided on a support wherein the polymer has repeating units formed from a nonionic hydrophobic monomer. The nonionic hydrophobic monomer has the formula ##STR1## R.sub.1 and R.sub.2 individually are a hydrogen atom or methyl group, R.sub.3 is a hydrogen atom, an alkyl or aryl group, and m and n are integers of from 2 to 100 individually.
    Type: Grant
    Filed: March 11, 1981
    Date of Patent: November 9, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kouji Tokitou, Tsuneo Wada
  • Patent number: 4264721
    Abstract: A color photographic material comprising, on a support, a silver halide emulsion layer which contains a 2-equivalent .alpha.-acylacetamide yellow coupler carrying a nitrogen-containing heterocyclic coupling off group, joined to a nitrogen atom, as being releasable upon the reaction with an oxidation product of a color developing agent and a compound of the following formula (I) or its tautomer: ##STR1## wherein X and Y are as herein defined, is described.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: April 28, 1981
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shinji Shimano, Tsuneo Wada, Katsuo Mogaki, Shinichi Nakamura, Kouji Tokitou