Patents by Inventor Keisuke Shiba

Keisuke Shiba 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: 5051342
    Abstract: A silver halide photographic light-sensitive material having at least one light-sensitive emulsion layer containing surface latent image-type silver halide grains, coated on a reflective support, in which said at least one emulsion layer contains regular crystal grains of silver chloride or silver chlorobromide having a mean silver chloride content of 80 mol % or more on the basis of the total silver halide grains contained therein and substantially does not contain silver iodide, and in which a colloidal silver-containing layer is located adjacent to said emulsion layer, wherein at least one of said colloidal silver-containing layer, said emulsion layer and an interlayer therebetween contains at least one mercaptoazole compound. The material is, after having imagewise exposed, processed with a color developer within 90 seconds. The material forms an image with excellent sharpness and whiteness.
    Type: Grant
    Filed: July 5, 1990
    Date of Patent: September 24, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Kazunori Hasebe, Seiji Ichijima
  • Patent number: 5037728
    Abstract: A photographic material package unit composed of a container sealed to ambient light containing a silver halide color light-sensitive film, the container having a shutter means for admitting a predetermined amount of light to the container and a lens for forming an image on the film using the light admitted by the shutter means; the color film being composed of a support having thereon:(a) at least one blue-sensitive silver halide emulsion layer containing a yellow coupler and having a spectral sensitivity distribution with a maximum spectral sensitivity of from 406 nm to 480 nm, the distribution within 80% of the maximum value being in a range of from 400 nm to 500 nm;(b) at least one green-sensitive silver halide emulsion layer containing a magenta coupler and having a spectral sensitivity distribution with a maximum spectral sensitivity of from 527 nm to 580 nm, the distribution within 80% of the maximum value being in a range of from 500 nm to 600 nm;(c) at least one red-sensitive silver halide emulsion l
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: August 6, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Noboru Sasaki
  • Patent number: 4977076
    Abstract: A presensitized plate from which a lithographic printing plate is to be prepared, comprising a support having provided thereon a non-silver light-sensitive layer comprising an O-quinonediazide compound and a silver halide light-sensitive layer in this order, said silver halide light-sensitive layer containing a specific sensitizing dye. The presensitized plate is specifically high in sensitivity to a light of the wavelength in the range of 480 nm to 520 nm, and therefore it can be handled even under the lighter safe light.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: December 11, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Masaki Okazaki, Kiyohiko Yamamuro, Shigeo Koizumi, Keisuke Shiba
  • Patent number: 4968595
    Abstract: A silver halide photographic emulsion containing silver halide grains having (III) faces, at least 50% (by projected area) of which are(a) silver halide grains controlled so that the development thereof is initiated at the corners or in the vicinity of the corners of the grains, and/or(b) silver halide grains controlled so that the development thereof is initiated at the edges or in the vicinity of the edges of the grains.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: November 6, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Sumito Yamada, Tadashi Ito, Hiroyuki Mifune, Keisuke Shiba, Toshihiro Nishikawa, Hideo Ikeda
  • Patent number: 4948719
    Abstract: A photographic support comprising a substrate having thereon a metal film layer having mirror reflective surface or secondary diffuse-reflective surface and an adhesive layer on the metal film layer, wherein the adhesive layer contains a copolymer composition of a diolefin and at least one other ethylenically unsaturated polymerizable monomer, or a silane coupling agent represented by formula (2-I) or (2-II): ##STR1## wherein Y represents an organic functional group, R represents an alkylene group having 1 to 5 carbon atoms, R' represents an alkoxy group having 1 to 4 carbon atoms, and n represents 2 or 3.
    Type: Grant
    Filed: April 11, 1988
    Date of Patent: August 14, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazuyuki Koike, Tetsuro Fuchizawa, Keisuke Shiba
  • Patent number: 4942114
    Abstract: A silver halide photographic material having at least one silver halide emulsion layer on a support, comprising a compound of formula (I):PWR--(Time).sub.t --FWA (I)in which PWR represents a group capable of releasing (Time).sub.t --FWA upon reduction; FWA represents a group which functions as a brightening agent; Time represents a group capable of releasing FWA through a reaction which follows the release of (Time).sub.t --FWA from PWR; and t represents an integer of 0 or 1.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: July 17, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Keizo Koya
  • Patent number: 4894321
    Abstract: The present invention relates to a photographic support comprising, on a substrate, a filling layer comprising a fine solid powder having the stationary diffuse-reflective surface and a color photosensitive material comprising at least one silver halide emulsion layer formed on the secondary diffuse-reflective surface of a filling layer comprising a solid powder formed on a substrate. A photographic support of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shade areas and sharpness. A printing color photosensitive material of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shades and sharpness and also capable of rigid development.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: January 16, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadashi Ogawa, Tetsuro Fuchizawa, Masaru Sano, Seiichi Taguchi, Keisuke Shiba
  • Patent number: 4880726
    Abstract: A method of forming a color image wherein a color print original is printed on a printing color photographic material and the thus printed material is then subjected to color development to give a color print, which is characterized in that a band stop filter having a half width of the spectral transmittance curve of said filter in a wavelength range outside the region of the maximum spectral sensitivity wavelength (.lambda.max).+-.20 nm of at least one light-sensitive layer of the printing color photographic material is provided between the light source to be used in said printing step and the light-sensitive layer of said printing color photographic material, and in that a compound of a general formula (I):(C.sub.p).X (I)wherein C.sub.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: November 14, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Seiji Ichijima, Kei Sakanoue, Seiichi Taguchi
  • Patent number: 4865962
    Abstract: A photographic light-sensitive material comprising a support having thereon at least one light-sensitive silver halide emulsion layer, characterized in that the emulsion layer contains silver chlorobromide prepared in such a manner that silver halide regular crystal grains, having no twinning crystal plane and containing 50 mol % or more of silver chloride, are used as host grains, an organic compound is adsorbed on a surface of each of the host grains, and sulfur-plus-gold sensitization is performed, either during or after halide conversion in the presence of a bromide.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: September 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunori Hasebe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa, Kei Sakanoue, Akira Abe
  • Patent number: 4866469
    Abstract: A photosensitive material package unit provided with an exposure function that has been preloaded with a photosensitive material having on a support a photographic layer having at least one silver halide emulsion layer and a back layer on the side opposite to the photographic layer is provided.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: September 12, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Hisashi Shiraishi
  • Patent number: 4851327
    Abstract: The present invention relates to a photographic support having a secondary diffuse-reflective surface, and a color photosensitive material comprising at least one silver halide emulsion layer formed on the secondary diffuse-reflective surface of a photographic support. A photographic support of the present invention provides an image having remarkably improved brightness, saturation, tone reproducibility in shadow areas and sharpness. A color photosensitive material of the present invention provides an image having remakably improved brightness, saturation, tone reproducibility in shades and sharpness and also capable of rapid development.
    Type: Grant
    Filed: July 15, 1987
    Date of Patent: July 25, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tetsuro Fuchizawa, Masaru Sano, Seiichi Taguchi, Keisuke Shiba, Tadashi Ogawa
  • Patent number: 4849325
    Abstract: A light-sensitive material package unit having an exposure function is disclosed, in which said light-sensitive material comprises a support having provided thereon at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler, at least one green-sensitive silver halide emulsion layer containing a magenta coupler, and at least one blue-sensitive silver halide emulsion layer containing a yellow coupler; at least one of said light-sensitive emulsion layers is composed of at least two layers being substantially the same in color sensitivity and different in sensitivity; and said light-sensitive emulsion layer composed of at least two layers contains a compound represented by formula (I)A--L.sub.1).sub.b Z.sub.1 (I)wherein A represents a component capable of releasing --(L.sub.1).sub.b Z.sub.1 upon reacting with an oxidation product of a color developing agent; L.sub.1 represents a timing group; Z.sub.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: July 18, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Sasaki, Keisuke Shiba
  • Patent number: 4839257
    Abstract: A color diffusion transfer photographic film unit and a method for forming image therewith which comprises a photosensitive sheet comprising a light-reflective support having disposed thereon in order outwardly from the support (a) a layer having neutralizing function, (b) a dye image-receiving layer, (c) a separating layer and (d) at least one light-sensitive emulsion layer comprising a light-sensitive silver halide, the light-sensitive emulsion layer being associated with at least one dye image-forming material; a transparent cover sheet superposed on the outermost layer of the photosensitive sheet; and rupturable storage means for providing a developing solution substantially opaque to light between the light-sensitive emulsion layer and the transparent cover sheet; provided that at least one of the light-reflective support and layer thereon disposed on the side of the light-sensitive emulsion layer opposite the transparent cover sheet is substantially opaque to light.
    Type: Grant
    Filed: October 23, 1987
    Date of Patent: June 13, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shigeru Nakamura, Minoru Minoda, Keisuke Shiba
  • Patent number: 4827298
    Abstract: Disclosed is a multi-layer color photographic light-sensitive material-packed unit for picture-taking in the form of a lens-combined picture-taking unit having an exposure function. The invention is characterized in that the size of the picture plane of the light-sensitive material in the unit is 3.0 cm.sup.2 or more, that the packed unit is further packaged with a moisture-proof bag, that the relative humidity in said moisture-proof bag is 65% or less at 25.degree. C. and that the absolute value of the curling of the said light-sensitive material is from -1 mm to +1.5 mm at the said relative humidity while the fluctuating value of the curling thereof is 1.5 mm or less.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: May 2, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Noboru Sasaki, Keisuke Shiba
  • Patent number: 4820624
    Abstract: A corner development type silver halide photographic emulsion is disclosed, wherein the silver halide crystals in the silver halide emulsion are cubic or tetradecahedral grains having at least substantial (100) planes and the emulsion is controlled so that at least 70% of developed silver halide crystals (grains), which are observed on applying a light exposure of 1/50 second to the emulsion under the light-exposure condition corresponding to (maximum density --minimum density).times.3/4 of the silver image in the characteristic curve of the emulsion obtained by the developer, developing under the development condition which are used for processing a photographic light-sensitive material formed by coating the emulsion on a support, and stopping the development with an aqueous solution of 5% glacial acetic acid just after the initiation of the development, are developed at the corners of the cubic or tetradecahedral crystals or at the vicinity of the corners.
    Type: Grant
    Filed: December 28, 1987
    Date of Patent: April 11, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kazunori Hasebe, Masahiro Asami, Naoto Ohshima, Keisuke Shiba, Toshihiro Nishikawa
  • Patent number: 4791004
    Abstract: A process for forming a multilayered coating film is disclosed, comprising forming a liquid film of a coating composition, increasing the viscosity of the liquid film, and laminating the liquid film having an increased viscosity onto a support or onto a coating film on a support. A multilayered coating film can thereby be formed easily and efficiently without involving interlaminar mixing between adjacent layers.
    Type: Grant
    Filed: May 22, 1987
    Date of Patent: December 13, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumiyuki Suzuki, Yoshiaki Tamura, Keisuke Shiba
  • Patent number: 4690886
    Abstract: A method for making a dry planographic printing plate, which comprises: exposing through a negative transparency a dry negative working presensitized plate comprising a base substrate having provided thereon, in order, a photosensitive layer containing an orthoquinonediazide compound and a silicone rubber layer; developing the exposed plate; exposing the developed plate to light so as to make its exposure value not less than 5% of the exposure value at the time of the exposure through the negative transparency; and then treating the exposed plate with a basic compound.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: September 1, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhisa Naritomi, Hiroshi Takahashi, Keisuke Shiba
  • Patent number: 4642283
    Abstract: A negative working light-sensitive lithographic plate requiring no dampening solution and a plate making process are described, the negative working light-sensitive lithographic plate comprising a support having, in sequence, on said support, (A) a light-sensitive layer containing (1) an o-quinonediazide compound and (2) a coupling component which causes a diazo coupling reaction under a basic environment, and (B) a silicone rubber layer, and the plate making process comprising imagewise exposing the negative working light-sensitive lithographic plate and developing said exposed plate to obtain a lithographic plate requiring no dampening solution, wherein a step of processing with base is carried out after imagewise exposure.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: February 10, 1987
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Takahashi, Yasuhisa Narutomi, Yoshimasa Aotani, Keisuke Shiba
  • Patent number: 4590148
    Abstract: A process for producing a light-sensitive lithographic plate requiring no dampening solution comprising (1) carrying out corona discharge treatment on the surface of a silicone rubber layer of a light-sensitive lithographic plate requiring no dampening solution wherein the silicone rubber layer is the top layer, (2) spraying a solution or dispersion containing a non-volatile solid component on said silicone rubber layer, and (3) drying to provide fine projection patterns on said silicone rubber layer.
    Type: Grant
    Filed: March 12, 1985
    Date of Patent: May 20, 1986
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hiroshi Takahashi, Hiroyuki Tamaki, Chikashi Ohishi, Keisuke Shiba
  • Patent number: 4555461
    Abstract: An electrophotographic plate making material comprising a substrate comprising a paper support and a polyolefin laminate layer on at least one surface thereof and having a volume resistance of 10.sup.10 ohms or less, and a photoconductive layer on the substrate.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: November 26, 1985
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Keisuke Shiba, Tetsuro Fuchizawa, Sho Nakao, Chikashi Ohishi