Patents by Inventor Masayuki Kurematsu

Masayuki Kurematsu 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: 4587195
    Abstract: A method of processing a silver halide photographic material using a color developer containing at least two kinds of triazylstilbene brightening agents having maximum fluorescent wavelengths at least 4.mu. apart, said material containing a sensitizing dye and an antiirradiation dye.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: May 6, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masao Ishikawa, Shigeharu Koboshi, Masayuki Kurematsu
  • Patent number: 4567134
    Abstract: A method for processing of a light-sensitive silver halide color photographic material comprising a continuous processing method comprising a stabilizing processing step involving substantially no water washing step after fixing processing, characterized in that said light-sensitive silver halide color photographic material contains at least one of cyan couplers represented by the formula (I) or (II) shown below, and the amount of stabilizing solution supplemented is 0.1 to 30 times the amount carried over from the precedent bath per unit area of said light-sensitive material to be processed: ##STR1## wherein X represents ##STR2## (wherein R.sub.2 is an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group or a hetero ring; R.sub.3 is a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group or a hetero ring; or R.sub.2 and R.sub.3 may be bonded together to form a 5- or 6-membered ring), R.sub.
    Type: Grant
    Filed: March 26, 1984
    Date of Patent: January 28, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shigeharu Koboshi, Masayuki Kurematsu
  • Patent number: 4562144
    Abstract: An image stabilizer for silver halide photographic materials which contains a water-soluble bismuth compound is disclosed. In a preferred embodiment, the stabilizer also contains a water soluble chelating agent capable of forming a bismuth complex or its salt having a stability constant (log KMA) of 3 or more, said constant being represented by formula (I): ##EQU1## wherein M is a bismuth ion and A is a complex forming anion. By using this stabilizer, the processed dye image is kept stable over an extended period and the occurrence of yellow stain in the non-image area is inhibited. The stabilizer is applicable not only to color photographic materials but also to black-and-white materials.
    Type: Grant
    Filed: October 17, 1984
    Date of Patent: December 31, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masayuki Kurematsu, Shigeharu Koboshi
  • Patent number: 4537856
    Abstract: A method of processing a silver halide color photographic material is disclosed. The material is treated with a bleach-fixing solution or a fixing solution, and then, without washing with water, treated with a stabilizing solution incorporating a water-soluble chelate compound of at least one metal selected from the group consisting of Ba, Ca, Ce, Co, In, La, Mn, Ni, Pb, Ti, Sn, Zn and Zr and the group consisting of Mg, Al and Sr.
    Type: Grant
    Filed: April 5, 1984
    Date of Patent: August 27, 1985
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masayuki Kurematsu, Shigeharu Koboshi
  • Patent number: 4336324
    Abstract: A method of stabilization using a plurality of baths which are replenished by a multi-stage counterflow system with the final bath having a pH of from 2.0 to 6.5.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: June 22, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Shigeharu Koboshi, Masayuki Kurematsu
  • Patent number: 4330616
    Abstract: A process of developing a color photographic material with a color developer, a diphosphonic acid and a water soluble metallic salt of magnesium, aluminum, zinc, barium or zirconium.
    Type: Grant
    Filed: July 23, 1981
    Date of Patent: May 18, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Masayuki Kurematsu, Shigeharu Koboshi