Patents by Inventor Takashi Fujioka

Takashi Fujioka 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: 4710456
    Abstract: A silver halide photographic material comprising a support and at least two silver halide emulsion layers on one or both sides of the support, wherein at least one of silver halide emulsion layers contains a polymer having a repeating unit represented by the general formula (I) and/or dextran: ##STR1## wherein R.sup.1 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms; R.sup.2 and R.sup.3, which may be the same or different, and are each a hydrogen atom, or a group having 10 or less carbon atoms and selected from the group consisting of a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted aralkyl group, and R.sup.2 and R.sup.3 may combine together with the nitrogen atom to which they are attached to form a nitrogen-containing heterocyclic ring; L is an (m+1)-valent connecting group; n is 0 or 1; and m is 1 or 2.
    Type: Grant
    Filed: September 11, 1985
    Date of Patent: December 1, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takashi Naoi, Takashi Fujioka, Hisashi Okamura, Masaki Satake
  • Patent number: 4485170
    Abstract: A photographic silver halide light-sensitive material is described. The material is comprised of a support with at least one gelatin-containing hydrophilic layer provided thereon. The gelatin-containing hydrophilic layer contains a styrene-butadiene copolymer latex. With this photographic silver halide light-sensitive material, the formation of fog and desensitization occur less if it is bent or sucked during the production, working, and development thereof. There is thus provided a light-sensitive material which is improved in its resistance against mechanical stresses without causing a loss of transparency during development, and further, without increasing its surface electric resistance.
    Type: Grant
    Filed: February 10, 1983
    Date of Patent: November 27, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuo Takahashi, Takashi Fujioka, Yasuhiro Nakayama