Patents by Inventor Sosuke Hanai

Sosuke Hanai 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: 4131469
    Abstract: A dye mordant composition containing a polymer comprising repeating units with at least 20 mol % of the repeating units having the general formula (I): ##STR1## wherein R.sub.1 represents an alkyl group containing 1 to 12 carbon atoms, an aralkyl group, an aryl group or an allyl group; R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom, an alkyl group, an aralkyl group, an aryl group or an allyl group, where the total number of carbon atoms contained in the main chain and/or ring of R.sub.2 and R.sub.3 is less than 16; n represents an integer from 2 to 20; and X.sup..crclbar. represents an anion.
    Type: Grant
    Filed: September 1, 1977
    Date of Patent: December 26, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takushi Miyazako, Shinji Sakaguchi, Sosuke Hanai, Yukio Karino
  • Patent number: 4124394
    Abstract: In a color diffusion transfer photographic material which comprises a photosensitive element containing at least one silver halide emulsion layer having associated therein a non-diffusible dye image-providing material, an image-receiving element for immobilizing therein diffusible dye formed by the oxidation reaction of the dye image-providing material and a primary aromatic amino color developing agent to form dye images, and a processing composition for developing the exposed silver halide in the silver halide emulsion layer and transferring the diffusible dye formed into the image-receiving layer with at least one of the photosensitive elements, the image-receiving element or the processing composition containing a primary aromatic amino color developing agent or a precursor thereof, with the photosensitive element and/or the image-receiving element of the photographic material containing at least one of divinyl sulfone and a divinyl sulfone derivative represented by the formula (I): ##STR1## wherein B rep
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: November 7, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hidefumi Sera, Motohiko Tsubota, Sosuke Hanai
  • Patent number: 4069048
    Abstract: In a diffusion transfer color photographic material including a photosensitive element comprising silver halide emulsion layers having associated therewith dye image forming materials, an image receiving element, and a liquid processing composition for developing the silver halide emulsion layers after image-wise exposure and diffusing the dye images formed into the image receiving element, the dye images formed are stabilized and the formation of stains at blank areas is effectively prevented by incorporating one or more N-.alpha.-sulfoalkylated amino acids into at least one of the photosensitive element, the image receiving element or the liquid processing composition. A process using the same is also disclosed.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: January 17, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Motohiko Tsubota, Sosuke Hanai, Yasushi Oishi, Hidefumi Sera, Nobuo Yamamoto