Patents by Inventor Taiji Hashimura

Taiji Hashimura 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: 4452882
    Abstract: A silver halide photographic light-sensitive material and a developing process used in connection with that material are disclosed. The material is comprised of a support having thereon a silver halide emulsion layer containing a silver halide emulsion in which at least 80 mole % of the whole silver halide is composed of silver chloride, the mean grain size thereof is less than 0.4 .mu.m, and which contains more than 1.times.10.sup.-6 mole of a water-soluble rhodium salt per mole of silver at an optional period before finishing the first ripening in the production step for the silver halide emulsion. The material also contains 1.times.10.sup.-5 to 1.times.10.sup.-2 mole of polyalkylene oxide having a molecular weight of at least 600 or a derivative thereof per mole of silver. The process involves imagewise exposing the material and processing it in a developer containing 0.05 to 0.5 mole/liter of a dihydroxybenzene series developing agent, 0 to 0.05 g/liter of an auxiliary developing agent, at least 0.
    Type: Grant
    Filed: April 29, 1983
    Date of Patent: June 5, 1984
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshitaka Akimura, Eiichi Okutsu, Shigenori Moriuchi, Naomi Saeki, Taiji Hashimura, Hiroyuki Mifune
  • Patent number: 4293639
    Abstract: The generation of toxic gases from a bleaching composition for silver halide color photographic materials containing a bleaching agent such as a persulfate or an inorganic ferric salt and a water-soluble halide can be prevented by the incorporation therein of a compound represented by the formula [I]:R.sup.1 --X--NH--R.sup.2 [I]wherein X is a carbonyl group or a sulfonyl group; R.sup.1 is an alkyl group, an alkenyl group, a phenyl group, an alkoxy group, an amino group, an acylamino group, or a heterocyclic ring; and R.sup.2 is a hydrogen atom, an alkyl group, an alkenyl group, a phenyl group, an acyl group, a carbamoyl group, or a heterocyclic ring; or R.sup.1 and R.sup.2 together form a 5- or 6-membered ring or a tautomer thereof.
    Type: Grant
    Filed: May 9, 1980
    Date of Patent: October 6, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Taiji Hashimura, Takatoshi Ishikawa
  • Patent number: 4292401
    Abstract: A bleaching composition for use in processing silver halide color photographic light-sensitive material, comprising compounds [I], [II], and [III] as follows:Compound [I]: at least one compound selected from the group consisting of a persulfate, an inorganic ferric salt, and an organic acid ferric complex;Compound [II]: a water-soluble halide; andCompound [III]: at least one compound selected from the compounds represented by following general formula [III]; ##STR1## wherein X represents carbon atoms or carbon and nitrogen atoms forming an unsubstituted or substituted 5-membered ring containing two unsaturated bonds, including a 5-membered ring fused with a 5- or 6-membered carbocyclic or heterocyclic ring.
    Type: Grant
    Filed: April 10, 1980
    Date of Patent: September 29, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Isamu Itoh, Taiji Hashimura, Takatoshi Ishikawa
  • Patent number: 4268618
    Abstract: A bleaching composition having strengthened oxidizing power and which markedly reduces color stains is described, which contains as essential components: (1) an organic acid-iron (III) complex salt; (2) an alkali metal or an ammonium salt of bromic acid; (3) a water-soluble halogenide; (4) at least one compound selected from the group consisting of the compounds having the formula (I) or (II)X--R.sup.1).sub.n COOM (I) ##STR1## wherein X represents COOM or an amino group, with M representing hydrogen, an alkali metal ion or ammonium ion; R.sup.1 represents a divalent aliphatic group containing 1 to 4 carbon atoms which may be substituted with hydroxy groups, amino groups and/or carboxy group; n is 0 or 1; and R.sup.2 and R.sup.3 may be the same or different from each other, and each represents an amino group, an acylamino group, an alkyl group, an alkenyl group, a phenyl group, or a 5-membered or a 6-membered heterocyclic group, or R.sup.2 and R.sup.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: May 19, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Taiji Hashimura