Patents by Inventor Mitsuto Fujiwhara

Mitsuto Fujiwhara 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: 4155765
    Abstract: This invention involves a color photographic material which contains a support and a hydrophilic layer containing a dye image wherein the material contains a compound represented by the following formula: ##STR1## wherein R represents an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group or a heterocyclic ring; R.sub.1, R.sub.2 and R.sub.3 individually represent hydrogen, halogen, an alkyl group, an alkylthio group, an alkoxy group, an aryl group, an aryloxy group, an arylthio group, an acyl group, an acylamino group, a diacylamino group, an acyloxy group, a sulfonamido group, an alkylamino group, a cycloalkyl group or an alkoxycarbonyl group; and Z represents an atomic group or groups necessary for forming a chroman or coumaran ring; provided that R and R.sub.1 can cooperatively be cyclized to form a chroman or coumaran ring.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: May 22, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takashi Sasaki, Takashi Uchida
  • Patent number: 4148656
    Abstract: A color photosensitive material comprising a support and a silver halide photosensitive layer containing compounds as represented by the following formula: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, C.sub.p, and X are as herein defined, is described.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: April 10, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takashi Sasaki, Takashi Uchida, Morio Kobayashi
  • Patent number: 4137080
    Abstract: There is disclosed a process for the production of a dye image on a silver halide photograhic material which comprises imagewise exposing the photographic material to light and then subjecting the photographic material to development in the presence of both a particular polyfunctional coupler and a particular polyfunctional developing agent.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: January 30, 1979
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Mikio Kawasaki, Yutaka Kaneko, Toyoaki Masukawa
  • Patent number: 4113490
    Abstract: An exposed light-sensitive silver halide photographic material containing a coupler is processed with a developing bath and thereafter with an amplifying bath containing hydrogen peroxide, said process being characterized in that a compound acting on the silver halide at the unexposed portion of the photographic material is incorporated into the developing bath or into a bath used for a treatment effected after the development and before processing with the amplifying bath.
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: September 12, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Mikio Kawasaki, Yutaka Kaneko
  • Patent number: 4094682
    Abstract: An improved method for processing an imagewise exposed light-sensitive silver halide photographic material containing a coupler is described, wherein the siliver halide photographic material is processed with a developing bath and thereafter processed, in the presence of imagewise developed silver and a color developing agent, with a solution containing hydrogen peroxide, whereby, after the development, the developed light-sensitive silver halide photographic material is processed with a solution containing a deactivating agent or a silver halide solvent, and thereafter subjecting the thus processed light-sensitive silver halide photographic material to spraying with and/or intermittent dipping in said solution containing hydrogen peroxide.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: June 13, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Toyoaki Masukawa, Mikio Kawasaki, Yutaka Kaneko
  • Patent number: 4063950
    Abstract: A light-sensitive silver halide photographic material comprising a new development inhibitor releasing type compound and a process for developing thereof.
    Type: Grant
    Filed: June 23, 1975
    Date of Patent: December 20, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Shoji Kikuchi, Ryosuke Satoh
  • Patent number: 4057432
    Abstract: A process for forming yellow image in a light-sensitive silver halide photographic material which uses as a yellow image-forming a coupler a compound of the formula ##STR1## wherein A is a yellow image-forming coupler residue having an active methylene group; ##STR2## is a group which has been substituted for one hydrogen atom of the active methylene group in said coupler residue A; and Z is a group selected from alkylene, alkenylene, cycloalkylene, cycloalkenylene, terphenylene, arylene and pyridine-diyl groups.
    Type: Grant
    Filed: July 16, 1973
    Date of Patent: November 8, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Tamotsu Kojima, Syunji Matsuo
  • Patent number: 4029503
    Abstract: A diffusible-dye releasing type dye consisting of a radical which reacts with an oxidation product of a color developing principal agent in a color development process to yield a substantially colorless compound and a dye residue carrying water-soluble radicals. Its photographic uses are also disclosed.
    Type: Grant
    Filed: May 7, 1975
    Date of Patent: June 14, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Ryosuke Sato
  • Patent number: 4010035
    Abstract: A light-sensitive silver halide color photographic material comprising a new development inhibitor releasing type compound and a hardening agent and a process for developing thereof.
    Type: Grant
    Filed: May 15, 1975
    Date of Patent: March 1, 1977
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Ryosuke Satoh
  • Patent number: 3973968
    Abstract: An imagewise-exposed, light-sensitive silver halide color photographic material is developed, by use of developer, in the presence of a compound of the general formula: ##EQU1## wherein A is a residue formed by removing one of the hydrogen atoms of the active methylene group of an active methylene group-containing yellow image-forming coupler of the acyl acetanilide type; X is a hydrogen atom, or an alkyl, acyl, carboxymethyl, alkoxycarbonylmethyl, carbamylmethyl, aryl, aralkyl, nitro or amino group; and Y and Z are individually a hydrogen atom, or an alkyl, ureido, aryl, aralkyl, benzylidene, styryl, or anilino group.
    Type: Grant
    Filed: April 6, 1972
    Date of Patent: August 10, 1976
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Syunji Matsuo, Tamotsu Kojima
  • Patent number: 3961959
    Abstract: A process for developing a light-sensitive silver halide photographic material in the presence of a new development inhibitor releasing type compound which liberates a compound having development inhibiting action and simultaneously produces a colourless compound.
    Type: Grant
    Filed: January 28, 1974
    Date of Patent: June 8, 1976
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Keiji Kasai, Yoshinobu Nakagawa, Hiroshi Tokura, Kenji Itoh, Seiji Muramoto
  • Patent number: 3958993
    Abstract: A silver photosensitive material comprising a development inhibitor-releasing compound of the formula ##EQU1## wherein Z is an atomic group necessary to form a 5 to 7 membered saturated or unsaturated carbon ring with the carbon atoms to which it is attached, said ring being unsubstituted or substituted by at least one of halogen and a member of the class consisting of alkyl, aryl, alkoxy, acyloxy, aryloxy, SY and a group forming a condensed carbon ring with said saturated or unsaturated carbon ring; Y is arylmercapto, heterocyclic, thioglycollic acid, cystein or glutathione. A method for the development of silver halide photosensitive material by the use of the foregoing compound is also disclosed.
    Type: Grant
    Filed: November 23, 1973
    Date of Patent: May 25, 1976
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Mitsuto Fujiwhara, Takaya Endo, Ryosuke Satoh, Toyoaki Masukawa, Satoshi Nakagawa
  • Patent number: 3938996
    Abstract: This invention relates to a development inhibitor-releasing compound of the following general formula: ##SPC1##Wherein Z is an atomic grouping necessary to form a carbocyclic ring; Y is a group which, when the sulfur atom of the thioether linkage is released, forms together with said sulfur atom a compound having a development-inhibiting action; and X is a hydroxyl group or a substituted or non-substituted amino group.
    Type: Grant
    Filed: June 17, 1974
    Date of Patent: February 17, 1976
    Assignee: Konishiroku Photo Industry Co. Ltd.
    Inventors: Mitsuto Fujiwhara, Ryosuke Satoh, Toyoaki Masukawa, Takahiro Uozumi