Patents by Inventor Makoto Kajiwara

Makoto Kajiwara 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: 4839263
    Abstract: A silver halide photographic material containing a support and, provided thereon, at least one silver halide emulsion layer, this silver halide emulsion layer containing silver halide grains containing 90 mol % or more of silver chloride, a dye-forming coupler, and a compound represented by general formula [S]; ##STR1## wherein Q is a group of atoms necessary to complete a 5- or 6-membered heterocyclic ring or a 5- or 6-membered ring fused with a benzene ring and M is a hydrogen atom, an alkali metal or an ammonium group;the silver halide layer having been hardened by a hardener represented by formula [HDA] or [HDB]; ##STR2## wherein Rd.sub.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: June 13, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masanobu Miyoshi, Makoto Kajiwara, Kaoru Onodera, Eiichi Sakamoto
  • Patent number: 4830955
    Abstract: The present invention relates to a silver halide photographic light-sensitive material comprising a support, at least one silver halide emulsion layer containing silver halide crystals, the silver chloride content of which being not less than 80 mol %, at least one compound which is represented by general formula [I], of which acid dissociation constant (Ka) and the solubility product (Ksp) with silver ion are not more than 1.times.10.sup.-8 and not more than 1.times.10.sup.-10, respectively; ##STR1## (wherein Z represents a group of atoms necessary to complete a heterocyclic ring) and at least one azaindene compound having at least one hydroxyl group.
    Type: Grant
    Filed: April 21, 1987
    Date of Patent: May 16, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Kajiwara, Kaoru Onodera
  • Patent number: 4784938
    Abstract: A silver halide photographic light-sensitive material which is improved on fog without decreasing photosensitivity. The photographic material comprises a support and a photographic structural layer provided thereon containing at least one silver halide emulsion layer and at least one non-light-sensitive layer. A nitrogen-containing heterocyclic mercapto compound is contained at least two layers of the photographic structure layer, and at least one of these mercapto compound-containing layer is a non-light-sensitive layer.
    Type: Grant
    Filed: October 17, 1986
    Date of Patent: November 15, 1988
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Keiji Obhayashi, Shinichi Nakamura, Shigeo Tanaka, Mitsuhiro Okumura, Masanobu Miyoshi, Makoto Kajiwara, Kaoru Onodera, Eiichi Sakamoto
  • Patent number: 4661441
    Abstract: Disclosed is a silver halide photographic material containing at least one layer of silver halide emulsion layers on a support characterized in that at least one layer of said silver halide emulsion layers contains mono-dispersed silver halide grains formed with (100) face and (111) face and said silver halide emulsion layer is hardened with at least one of the hardening agents represented by the formula [I] shown below and/or at least one of the hardening agents represented by the formula [II] shown below, ##STR1## wherein R.sub.1 represents a chlorine atom, a hydroxy group, an alkyl group, an alkoxy group, an alkylthio group, --OM group (M is a monovalent metal atom), --NR'R" (R' and R" are a hydrogen atom, an alkyl group or an aryl group, respectively) or --NHCOR"' (R"' is a hydrogen atom, an alkyl group or an aryl group) and R.sub.2 has the same meanings as R.sub.1 except for a chlorine atom, ##STR2## wherein R.sub.3, R.sub.3 ', R.sub.4 and R.sub.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: April 28, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Kajiwara, Kaoru Onodera
  • Patent number: 4591549
    Abstract: Improved process for preparing silver chlorobromide or silver chloroiodobromide emulsion wherein first silver ion solution and second halide ion solution are mixed by double jet method and mole % of silver bromide, silver chloride and silver iodide are in specified range, characterized in that molar ratio of Br.sup.- :Cl.sup.- :I.sup.- in second solution is within specified range and further step is included to produce silver halide with control of silver ion concentration by using third solution containing Br.sup.- and Cl.sup.-. Such emulsions have sufficiently narrow grain diameter distribution and silver halide composition distribution, with constant productivity.
    Type: Grant
    Filed: September 14, 1984
    Date of Patent: May 27, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Syoji Matsuzaka, Makoto Kajiwara, Masanobu Miyoshi, Kiyoshi Yamashita
  • Patent number: 4565774
    Abstract: Method for forming a dye image comprising imagewise exposing and processing a silver halide light-sensitive color photographic material having a support and coated thereon a silver halide emulsion layer containing silver halide crystals, wherein said silver halide crystals consist essentially of crystals having at least 80 mole % of silver chloride, said developing taking place in a developer essentially free from bromide ion and having a pH value of at least 9.5, in the presence of a p-phenylenediamine color-developing agent and a compound of the formula ##STR1## having an acid dissociation constant of not more than 1.times.10.sup.-8 and a solubility product with silver ion of not more than 1.times.10.sup.-10, wherein Z, together with N forms a heterocyclic ring, said compound.
    Type: Grant
    Filed: October 18, 1984
    Date of Patent: January 21, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Kajiwara, Kaoru Onodera
  • Patent number: 4510234
    Abstract: A silver halide photographic emulsion, which comprises (i) a mono-dispersed silver halide emulsion comprising 3 to 50 mole % of silver chloride, 1 mole % or less of silver iodide and 50 to 97 mole % of silver bromide having a grain size distribution of 0.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: April 9, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Syoji Matsuzaka, Makoto Kajiwara, Masanobu Miyoshi, Kiyoshi Yamashita
  • Patent number: 4507386
    Abstract: A silver halide photographic emulsion containing a coupler for photography, comprising silver halide particles in said emulsion consisting essentially of 2 mole % or less of silver iodide, 50 to 97 mole % of silver bromide and 1 to 50 mole % of silver chloride, and said particles are core/shell type silver halide particles containing a higher content of said 50 to 97 mole % silver bromide in the surface layers of said particles than in the inner portions thereof, the surface layer of said particles containing 70 to 100 mole % of silver bromide and the inner portion containing 40 to 70 mole % of silver bromide.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: March 26, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Syoji Matsuzaka, Makoto Kajiwara, Masanobu Miyoshi, Kiyoshi Yamashita
  • Patent number: 4374922
    Abstract: A method for the formation of a dye image. A silver halide color photographic light-sensitive material, having a support, component layers which are provided on the support and which have a swelling degree below 250 in the alkaline bath and components including an aromatic primary amine color developing agent or a precursor thereof, a nondiffusing yellow coupler, a nondiffusing magenta coupler and a nondiffusing phenolic cyan coupler having a substituted or unsubstituted acylamino group at the second and fifth positions thereof, is color developed in an alkaline bath. The material is then processed in a bleach-fixing bath.
    Type: Grant
    Filed: July 10, 1981
    Date of Patent: February 22, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Keiji Ohbayashi, Akihiko Miyamoto, Masaru Iwagaki, Makoto Kajiwara
  • Patent number: 4371609
    Abstract: A method of forming dye images by processing a photographic material containing imagewise distributed catalyzer substance in the presence of hydrogen peroxide, a coupler and certain aromatic primary amine compounds.
    Type: Grant
    Filed: July 16, 1981
    Date of Patent: February 1, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Kajiwara, Akihiko Miyamoto, Keiji Ohbayashi, Masaru Iwagaki