Patents by Inventor Yasushi Oishi

Yasushi Oishi 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: 4404274
    Abstract: A photographic light-sensitive element comprising a support and having thereon at least one silver halide emulsion layer containing an .alpha.-diacylamino substituted (aliphatic acyl) acetamide yellow dye forming coupler and a method for forming yellow dye images which comprises processing a silver halide photographic emulsion with an aromatic primary amino developing agent in the presence of an .alpha.-diacylamino substituted (aliphatic acyl) acetamide compound are disclosed. The coupler is an excellent two-equivalent coupler.
    Type: Grant
    Filed: April 6, 1981
    Date of Patent: September 13, 1983
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Atsuaki Arai, Yasushi Oishi, Akio Okumura, Kiyoshi Nakazyo
  • Patent number: 4324855
    Abstract: A process for developing a light-sensitive material comprising a support having thereon at least one internal latent image-forming silver halide photographic emulsion layer which comprises, after imagewise exposure, developing the light-sensitive material with an alkaline solution of a developing agent in the presence of a compound represented by the formula I which is capable of selectively forming latent images in the inner portions of said silver halide upon development: ##STR1## wherein Y represents an acyl group or a cyano group and said acyl group and the 3-, 4- or 5-position of the pyridinium ring may be optionally substituted.
    Type: Grant
    Filed: April 16, 1980
    Date of Patent: April 13, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Shigeo Hirano
  • Patent number: 4323635
    Abstract: A color photographic material suitable for processing with an alkaline solution in the presence of a developing agent is described, comprising a support and, in sequence, the following five layers:(1) a first emulsion layer containing an internal latent image forming direct reversal silver halide emulsion that is selectively sensitive to light in a first spectral region;(2) a first color material layer containing a ballasted dye releasing redox compound that provides a dye image that selectively absorbs light in the first spectral region;(3) an intermediate layer containing a ballasted reducing agent that captures an oxidized developing agent or electron transfer agent;(4) a second emulsion layer containing an internal latent image forming direct reversal silver halide emulsion that is selectively sensitive to light in a second spectral region; and(5) a second color material layer containing a ballasted dye releasing redox compound that provides a dye image that selectively absorbs light in the second spectra
    Type: Grant
    Filed: November 6, 1980
    Date of Patent: April 6, 1982
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasushi Oishi
  • Patent number: 4269936
    Abstract: The process of forming a dye image by developing an image-exposed silver halide photographic emulsion layer by an aromatic primary amine color developing agent in the presence of the yellow dye forming coupler shown by the general formula ##STR1## wherein R.sup.1 represents an aromatic group, R.sup.2 represents an aromatic group or a heterocyclic group, and Z represents the non-metallic atom or atoms necessary for forming a 4-membered ring, a 5-membered ring or a 6-membered ring together with ##STR2## in the above formula. A photographic element containing such a yellow-forming coupler.
    Type: Grant
    Filed: December 29, 1972
    Date of Patent: May 26, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Atsuaki Arai, Yasushi Oishi, Kiyoshi Nakazyo, Atsushi Sugizaki, Akio Okumura
  • Patent number: 4090211
    Abstract: A camera which permits film units to be initially stored as a plurality of first sheets and an equal number of second sheets. In taking a photograph, a first sheet is exposed and then transferred into correctly aligned contact with a corresponding second sheet, which may constitute a subsequently sealable folder or envelope for containment of the first sheet, or a cover which is bondable to the first sheet. This transfer of a first sheet is effected entirely independently in the camera, or by a camera mechanism acting on a draw mechanism attached firmly but not fixedly to the first sheet, in this latter case the draw mechanism being detached from the first sheet immediately subsequent to transfer thereof into association with the second sheet.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: May 16, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Hideo Horiuchi, Toshio Goto, Yoichi Hamada
  • Patent number: 4069048
    Abstract: In a diffusion transfer color photographic material including a photosensitive element comprising silver halide emulsion layers having associated therewith dye image forming materials, an image receiving element, and a liquid processing composition for developing the silver halide emulsion layers after image-wise exposure and diffusing the dye images formed into the image receiving element, the dye images formed are stabilized and the formation of stains at blank areas is effectively prevented by incorporating one or more N-.alpha.-sulfoalkylated amino acids into at least one of the photosensitive element, the image receiving element or the liquid processing composition. A process using the same is also disclosed.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: January 17, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Motohiko Tsubota, Sosuke Hanai, Yasushi Oishi, Hidefumi Sera, Nobuo Yamamoto
  • Patent number: 4052214
    Abstract: A color photographic light-sensitive material, which comprises a transparent support having thereon at least one emulsion layer unit containing the following three layers and capable of simultaneously providing, as a result of exposure and development, both a diffusible dye with a positive image distribution and a non-diffusible dye with a negative image distribution:1. a hydrophilic colloidal layer containing a ballasted coupler capable of reacting with an oxidation product of an aromatic primary amine color developing agent to form a diffusible dye, and a spontaneously developable, slightly soluble silver salt dispersion,2. a first negative type light-sensitive silver halide emulsion layer provided adjacent the colloidal layer (1) and containing a ballasted compound capable of reacting with an oxidation product of an aromatic primary amine color developing agent to release a diffusible development inhibitor inhibiting the development of the silver salt in the above-described colloidal layer (1), and3.
    Type: Grant
    Filed: August 26, 1975
    Date of Patent: October 4, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Yoshinobu Yoshida
  • Patent number: 4015989
    Abstract: A color photographic light-sensitive material which comprises a support having thereon at least one emulsion layer unit comprising;A. a hydrophilic colloid layer containing spontaneously developable silver halide grains which are associated with a coupler capable of reacting with an oxidation product of an aromatic primary amino color developing agent to provide a dye and which are rendered substantially light-insensitive with a desensitizer, andB. an adjacent negative type light-sensitive silver halide emulsion layer associated with a compound capable of reacting with an oxidation product of an aromatic primary amino color developer to release a diffusible development inhibitor.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: April 5, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Masanao Hinata
  • Patent number: 3993486
    Abstract: A diffusion transfer color photographic film unit, (a) which contains:1. a light-sensitive element comprising a support having thereon at least one light-sensitive silver halide emulsion layer having associated therewith a dye image-forming material which, as a result of development, forms an imagewise distribution of a dye image-forming material capable of diffusing through a processing solution;2. an image-receiving element comprising a transparent support having thereon an image-receiving layer for receiving the dye image-forming material upon diffusion;3. a light-intercepting element having substantially the same area as the image-receiving element and being capable of protecting an emulsion layer or layers from external light during processing of the film unit in a bright place out of a camera;4.
    Type: Grant
    Filed: June 4, 1974
    Date of Patent: November 23, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasushi Oishi
  • Patent number: 3993488
    Abstract: A photographic film assembly, which contains a plurality of light-sensitive sheets stacked in a planar parallel relationship between the front wall of a film container having a rectangular opening for exposure and a pressure plate in a planar parallel relationship with the front wall, each of the light-sensitive sheets comprising a transparent support having thereon, in sequence, at least one silver halide light-sensitive emulsion layer and an light-intercepting layer of a hydrophilic colloid containing a light absorbent in an amount necessary for preventing, upon exposure, a next light-sensitive sheet lying behind in the direction of exposure from being fogged, and each of the light-sensitive sheets being retained in the container with the support being directed toward the exposure opening.
    Type: Grant
    Filed: August 14, 1974
    Date of Patent: November 23, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasushi Oishi
  • Patent number: 3977877
    Abstract: A silver salt diffusion transfer photographic film unit suitable for exposing a photosensitive element in a camera and processing the exposed photosensitive element in a bright place outside the camera.
    Type: Grant
    Filed: August 19, 1974
    Date of Patent: August 31, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Yasushi Oishi
  • Patent number: 3964905
    Abstract: A color photographic cine or TV film on which a sound recording band or track can be formed without the necessity for a specific additional treatment comprising a film base having thereon at least a silver halide emulsion layer containing a coupler capable of forming a dye by the coupling reaction with the oxidation product of an aromatic primary amino developing agent, and at least one of the emulsion layers of the color photographic material containing a bleach inhibitor in only the portion defined as the sound recording track.
    Type: Grant
    Filed: March 13, 1974
    Date of Patent: June 22, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Hirose, Yasushi Oishi, Tadao Sakai
  • Patent number: 3960570
    Abstract: A color photographic silver halide light-sensitive material containing a 2-equivalent alpha-acylacetoamide yellow dye-forming coupler and a monoalkylhydroquinone.
    Type: Grant
    Filed: February 11, 1974
    Date of Patent: June 1, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Reiichi Ohi, Yoshio Kosuge
  • Patent number: 3935015
    Abstract: A color photographic material having differently sensitized silver halide emulsion layers including a silver halide emulsion layer containing a 3-anilino-5-pyrazolone magenta dye-forming coupler, the coupler having a halogen atom or an alkoxyl group at the 2-position of the anilino group and an aliphatic acylamino group at the 5-position of the anilino group.
    Type: Grant
    Filed: February 22, 1974
    Date of Patent: January 27, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Atsuaki Arai, Yasushi Oishi, Akio Okumura, Minoru Yamada, Yukio Yokota, Kozo Inouye
  • Patent number: 3935016
    Abstract: A color photographic material comprising a support having coated thereon at least one silver halide emulsion layer containing a magenta dye forming coupler having a 3-anilino-5-pyrazolone ring in which the ortho position of the anilino group at the 3-position is substituted with a halogen atom, an alkyl group, an alkoxy group, an amide group, an aryl group, an aryloxy group, a cyano group, a nitro group, a hydroxyl group, or an amino group and having a hydrophobic residue of 8 to 32 carbon atoms, the silver halide emulsion layer or an emulsion layer adjacent to the silver halide emulsion layer containing a hydroquinone derivative having at least one substituent of at least 8 carbon atoms or a precursor capable of providing such a hydroquinone derivative by hydrolysis.The color photographic material provides magenta dye images having good color separation and less color fog and less color stains in the highlight areas.
    Type: Grant
    Filed: April 15, 1974
    Date of Patent: January 27, 1976
    Assignee: Fuji Photo Film Company, Ltd.
    Inventors: Tokio Nishimura, Minoru Yamada, Hiroyuki Amano, Yasushi Oishi
  • Patent number: 3930866
    Abstract: A color photographic material having at least one silver halide emulsion layer containing a 3-anilino-5-pyrazolone type magenta dye forming coupler and a phenolic compound for improving the light fastness of the magenta dye formed by the coupling reaction of the magenta dye forming coupler with the oxidation product of a color developing agent in combination with a nucleus-substituted hydroquinone, in which the reduction of the coupling reactivity of the magenta dye forming coupler during the storage of the color photographic material caused by the presence of the phenolic compound is prevented efficiently.
    Type: Grant
    Filed: April 23, 1974
    Date of Patent: January 6, 1976
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasushi Oishi, Minoru Yamada, Hiroyuki Amano, Tokio Nishimura