Patents by Inventor Kenji Kumashiro

Kenji Kumashiro 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: 5004680
    Abstract: A silver halide photographic light-sensitive material is disclosed which has a high speed with a low fog and is improved on the long-term preservability. The light-sensitive material comprises a support having thereon a photographic component layer including at least one silver halide emulsion layer, in which the silver halide emulsion layer comprises silver halide grains, each of which are comprised of two or more phases different in the silver iodide content, wherein the average silver iodide content of the grain is higher than the silver iodide content of the external phase of the grain, and to at least one layer included the photographic component layer is added elementary sulfur in a step of manufacturing process of the silver halide photographic light-sensitive material.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: April 2, 1991
    Assignee: Konica Corporation
    Inventors: Toshihiko Yagi, Kenji Kumashiro, Hideki Takiguchi
  • Patent number: 5002859
    Abstract: A method for forming photographic color images is disecond closed, in which a silver halide color photographic light-sensitive material is rapidly processed with low replenishment of processing solutions. The images improved in lowered yellow stain can be obtained. The processing comprises steps of color developing, bleaching immediately after the developing step, and treating with a bath having a fixing capability following the bleaching step. The steps of bleaching and treating with a solution having a fixing capability are carried out for a time of not more than 3 minutes 45 seconds at a temperature of from 20.degree. to 45.degree. C. The light-sensitive material comprises silver halide emulsion layers each containing silver bromide and/or silver boromoiodide grains and satsifies at least one of the following requirements (1) and (2); (1) a blue light-sensitive emulsion layer included in the silver halide emulsion layers has a silver density d of not less than 4.0.times.10.sup.-1 g/cm.sup.3.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: March 26, 1991
    Assignee: Konica Corporation
    Inventors: Satoru Kuse, Masao Ishikawa, Shigeharu Koboshi, Yoshiharu Mochizuki, Kenji Kumashiro
  • Patent number: 5002865
    Abstract: A silver halide photographic material is disclosed, said material having silver halide emulsion layers on a support, the emulsion in said silver halide emulsion layers containing magenta coupler represented by the following formula (I), said emulsion containing silver halide grains which have a (110) plane and/or a crystal plane having an edge running through substantially the center of a (110) plane, the silver halide composition of said grains being substantially made of silver bromide and/or silver iodobromide: ##STR1## where Z represents a group of the non-metallic atoms necessary for forming a nitrogen-containing hetero ring which may have a substituent; X is a hydrogen atom or a substituent which is capable of being eliminated upon reaction with the oxidation product of a color developing agent; and R is a hydrogen atom or a substituent.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: March 26, 1991
    Assignee: Konica Corporation
    Inventors: Kenji Kumashiro, Hiroshi Kashiwagi, Syoji Matsuzaka, Toshifumi Iijima
  • Patent number: 4990437
    Abstract: A silver halide photographic light-sensitive materially having at least one silver halide emulsion layer comprising a magenta coupler represented by formula I and negative type silver halide grains having a core-shell structure which consists of:(a) an inner core consisting essentially of silver bromide or silver iodobromide; and(b) a plurality of shells consisting essentially of silver bromide or silver iodobromide comprising:(i) an outermost shell containing 0 to 10 mol % of silver iodide;a high iodide-containing shell provided inside said outermost shell having a silver iodide content at least 6 mol % higher than that of the outermost shell; and(iii) an intermediate shell provided between the outermost shell and the high iodide-containing shell having a silver iodide content at least 3 mol % higher than that of the outermost shell, and at least 3 mol % lower than that of the high iodide-containing shell: ##STR1## Wherein Z represents a group of non-metallic atoms necessary to complete a nitrogen-containing
    Type: Grant
    Filed: June 20, 1989
    Date of Patent: February 5, 1991
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshifumi Iijima, Kenji Kumashiro, Syoji Matsuzaka, Hiroshi Kashiwagi
  • Patent number: 4977069
    Abstract: A silver halide color photographic light-sensitive material comprising a support having arranged thereon at least two each of red-sensitive layers, green-sensitive layers and blue-sensitive layers, wherein, with respect to each of the red-sensitive layers, the blue-sensitive layers and the green-sensitive layers, there are not less than two silver halide layers having different sensitivities, said material satisfying the following four requirements:a. the highest blue-sensitive silver halide emulsion layer (BH) is arranged to serve as the silver halide emulsion layer in the farthest position from the support;b. the highest green-sensitive silver halide emulsion layer (GH) and the highest red-sensitive silver halide emulsion layer (RH) are interposed between the highest blue-sensitive silver halide emulsion layer (BH) and a lower blue-sensitive silver halide emulsion layer (Bh);c.
    Type: Grant
    Filed: April 13, 1990
    Date of Patent: December 11, 1990
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshifumi Iijima, Yoshitaka Yamada, Kenji Kumashiro, Hideo Akamatsu, Takashi Kamio
  • Patent number: 4840886
    Abstract: A silver halide color photographic material having at least one silver halide emulsion layer on a support is disclosed. Said silver halide emulsion layer contains at least one of the 1H-pyrazolo [3,2-c]-S-triazole derived magenta couplers that have a substituent of the following formula at 3-position:--R.sub.1 --S(O).sub.n --R.sub.2whereinR.sub.1 is an alkylene group;R.sub.2 is an alkyl, cycloalkyl or aryl group; andn is 1 or 2.
    Type: Grant
    Filed: February 26, 1988
    Date of Patent: June 20, 1989
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshifumi Iijima, Kenji Kumashiro, Hiroshi Kashiwagi, Koichi Hatta, Yuji Hotta, Hiroko Ohya, Noritaka Nakayama, Satoshi Kawakatsu, Katsunori Katoh, Kaoru Shinozaki
  • Patent number: 4766058
    Abstract: A photographic material comprising at least one blue sensitive silver halide emulsion layer is disclosed. The silver density of the emulsion layer is not less than 4.0.times.10.sup.-1 g/cm.sup.3 and the dry thickness of the layer is not more than 4.0 .mu.m. A core/shell type silver halide emulsion and a high-speed reaction type scavenger for the oxidation products of a developing agent are preferably used for the emulsion layer. The photographic material has a high sensitivity and provides an image having a superior sharpness and resolution.
    Type: Grant
    Filed: July 16, 1986
    Date of Patent: August 23, 1988
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takeshi Sampei, Toshifumi Iijima, Yoshitaka Yamada, Hiroshi Shimazaki, Kenji Kumashiro, Yoshiharu Mochizuki, Syoji Matsuzaka, Hiroshi Kashiwagi
  • Patent number: 4752558
    Abstract: Disclosed is a light-sensitive silver halide photographic material comprising at least one layer of green-sensitive silver halide emulsion layer (GH), at least one layer of red-sensitive silver halide emulsion layer (RH) and a plural number of blue-sensitive silver halide emulsion layers with different sensitivities, provided on a support, which is characterized in that one of the said plural number of blue-sensitive silver halide emulsion layers is provided as a silver halide emulsion layer (BH) positioned at the farthest side from the support, at least one layer GH and at least one layer RH are provided between the layer BH and a blue-sensitive silver halide emulsion layer lower in sensitivity than the layer BH, and further fine grains of silver halide are contained in at least one of the said blue-sensitive emulsion layer of lower sensitivity and a layer adjacent thereto. The fine grains of silver halide may have a blue-sensitive sensitizing dye adsorbed on the surfaces thereof.
    Type: Grant
    Filed: November 20, 1986
    Date of Patent: June 21, 1988
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shinya Shimura, Yoshitaka Yamada, Toshifumi Iijima, Kenji Kumashiro, Takashi Kamio
  • Patent number: 4724198
    Abstract: There is disclosed a light-sensitive silver halide color photographic material having red-sensitive, green-sensitive and blue-sensitive emulsion layers, each layer consisting of two or more layers with different sensitivities on a support, wherein the layers are constituted so as to satisfy the following requirements (A), (B), (C) and (D):(A) of the respective emulsion layers having the highest sensitivities among the the red-sensitive, green-sensitive and blue-sensitive emulsion layers, the highest sensitivity blue-sensitive emulsion layer is provided on the side farthest from the support;(B) at least the the highest sensitivity red-sensitive emulsion layer and the highest sensitivity green-sensitive emulsion layer are provided between the the highest blue-sensitive emulsion layer and a blue-sensitive emulsion layer with lower sensitivity;(C) none of the respective red-sensitive, green-sensitive and blue-sensitive emulsion layers having the lowest sensitivities exists on the side farther than the low sensiti
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: February 9, 1988
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshitaka Yamada, Toshifumi Iijima, Kenji Kumashiro, Takashi Kamio, Shinya Shimura
  • Patent number: 4701404
    Abstract: A silver halide color photographic material having blue-, green- and red-sensitive silver halide emulsion layers coated on a support is provided, each of said layers being composed of a plurality of sub-layers having different sensitivities. In said material, at least a red-sensitive silver halide emulsion sub-layer having high sensitivity is provided between a first green-sensitive silver halide emulsion sub-layer of high sensitivity and a second green-sensitive silver halide emulsion sub-layer having a lower sensitivity than said first green-sensitive sub-layer, said first green-sensitive sub-layer and/or said red-sensitive sub-layer with high sensitivity giving a maximum color density of formed dye in said material higher than 0.6 but not exceeding 1.3.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: October 20, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshifumi Iijima, Yoshitaka Yamada, Kenji Kumashiro, Takashi Kamio, Shinya Shimura
  • Patent number: 4695533
    Abstract: This invention relates to a silver halide photographic light-sensitive material in which at least one of the silver halide emulsion layers thereof contains an 1H-pyrazolo[3,2-C]-s-triazole magenta coupler substituted in the third position by a group represented by the following Formula [I];--R.sub.1 --SO.sub.2 --R.sub.2 Formula [I]wherein R.sub.1 represents an alkylene group having not less than 3 carbon atoms in the straight-chained portion thereof, which is capable of linking a --SO.sub.2 --R.sub.2 to the carbon atom in the third position of the nucleus of the 1H-pyrazolo[3,2-C]-s-triazole; and R.sub.2 represents an aryl group.The silver halide photographic light-sensitive materials of the invention are excellent in light-resistance of magenta dye images and also spectral absorption characteristics.
    Type: Grant
    Filed: May 28, 1986
    Date of Patent: September 22, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Noritaka Nakayama, Satoshi Kawakatsu, Katsunori Katoh, Toshijumi Iijima, Kenji Kumashiro, Hiroshi Kashiwagi, Koichi Hatta, Takashi Uchida, Hajime Wada, Fumio Ishii, Satoshi Matsunaga, Yasuko Matsubara, Kaoru Shinozaki
  • Patent number: 4692400
    Abstract: A silver halide photographic light-sensitive material comprising a least one silver halide emulsion layer, wherein said silver halide emulsion layer comprisesa phenol-type cyan coupler having at the 2-position of the penol nucleus thereof a group selected from the group consisting of a phenyl-ureido group, a naphthyl-ureido group and a heterocyclic ureido group, and having at the 5-position thereof an acylamino group, anda negative type silver halide grains of a core-shell structure which consisting of silver bromide or silver iodobromide and a plurality of shells essentially consisting of silver bromide or silver iodobromide, said plurality of shells comprising an outermost shell containing 0 to 10 mol % of silver iodide, a highly iodide-containing shell provided inside said outermost shell of which silver iodide content is at least 6 mol % of silver iodide, a highly iodide-containing shell provided inside said outermost shell of which silver iodide content is at least 6 mol % higher than that of said outerm
    Type: Grant
    Filed: April 29, 1986
    Date of Patent: September 8, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kenji Kumashiro, Toshifumi Iijima, Hideo Akamatsu, Syoji Matsuzaka
  • Patent number: 4665015
    Abstract: A silver halide color photographic material is disclosed which has at least one silver halide emulsion layer on a support, said silver halide emulsion layer containing at least one magenta coupler having the following formula: ##STR1## wherein R.sub.1 is a tertiary alkyl group; R.sub.2 is a secondary or tertiary alkyl group; X is a leaving group other than a hydrogen atom that leaves upon reaction with the oxidation product of a color developing agent.
    Type: Grant
    Filed: September 13, 1985
    Date of Patent: May 12, 1987
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshifumi Iijima, Kenji Kumashiro, Hiroshi Kashiwagi, Koichi Hatta, Noritaka Nakayama, Satoshi Kawakatsu, Katsunori Katoh, Kaoru Shinozaki
  • Patent number: 4554247
    Abstract: A silver halide photographic material having as essential photographic layers at least one photosensitive silver halide emulsion layer and at least one non-sensitive hydrophilic colloidal layer on a support is disclosed. At least one of said photographic layers contains fine oil globules at a density of 1 or more, and a hardener having at least three functional groups is incorporated in at least one photographic layer containing said fine oil globules and/or at least one photographic layer which is farther from said support than the photographic layer containing said fine oil globules.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: November 19, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kiyotoshi Yamashita, Minoru Ishikawa, Hideo Ohta, Kenji Kumashiro
  • Patent number: 4481288
    Abstract: There is disclosed a light-sensitive silver halide photographic material having at least one silver halide emulsion layer constituted of a plural number of layers which are substantially the same in color to which they are sensitive but different in sensitivity provided on a support, which comprises a layer having the highest sensitivity among the plural number of layers with different sensitivities which contains at least two kinds of substantially mono-dispersed silver halide grains with different average grain sizes.The light-sensitive silver halide photographic material according to this invention is high in sensitivity and excellent in graininess of dye image.
    Type: Grant
    Filed: October 14, 1983
    Date of Patent: November 6, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Yoshitaka Yamada, Toshifumi Iijima, Toshihiko Yagi, Yoshihiro Haga, Kenji Kumashiro, Hiroshi Menjo
  • Patent number: 4480028
    Abstract: Silver halide photographic material having at least one light sensitive silver halide emulsion layer, at least one non-light sensitive hydrophilic colloidal layer, and optionally a third type of layer, wherein at least one of said emulsion layers, colloid layers, or third type of layers has, in a single layer, both a magenta coupler of Formula I and a development inhibitor releasing compound having a development inhibitor radical of Formula II or III, said Formula is wherein R.sub.1 is selected from benzamido, anilino, and phenylureido, each having a sulfonamido group and R.sub.2 is selected from aryl and heterocyclic groups; said Formula II is ##STR1## wherein R.sub.3 is selected from hydrogen, halogen, acylamino, alkyl, benzothiazolinylidenamino and phenyl substituted alkoxy; said Formula III is ##STR2## wherein X is a group of non-metallic atoms necessary to complete, together with the C.dbd.N group, a five or six membered heterocyclic ring.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: October 30, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Kazuo Kato, Yoshikazu Watanabe, Kenji Kumashiro, Satoru Shimba
  • Patent number: 4477559
    Abstract: There is disclosed a photosensitive silver halide color photographic material comprising a support having on one side thereof, an antihalation layer, a red-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a blue-sensitive silver halide emulsion layer wherein each of said silver halide emulsion layers contains a non-diffusable coupler. The other surface of the support has thereon a dye-containing backing layer. The antihalation layer contains no more than 0.2 g/m.sup.2 of silver and the total amount of silver contained in the silver halide emulsion layers is at least 7.0 g/m.sup.2.
    Type: Grant
    Filed: February 22, 1983
    Date of Patent: October 16, 1984
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masao Iwamuro, Kenji Kumashiro