Patents by Inventor Michiko Nagato

Michiko Nagato 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).

  • Silver halide light-sensitive color photographic material
    Patent number: 5998123
    Abstract: A silver halide light-sensitive color photographic material is disclosed. A coupler represented by the formula is used.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: December 7, 1999
    Assignee: Konica Corporation
    Inventors: Shinri Tanaka, Michiko Nagato
  • Resources recovery method in a silver salt photographic system
    Patent number: 5985528
    Abstract: A method to recover the resources incorporated in a photographic material is disclosed. An exposed silver salt light-sensitive photographic material is subjected to color development processing; the obtained image information is optically read; digital image information is obtained by converting the read information to electrical signals, and the resulting image information is recorded on a recording medium, and resources incorporated in a photographic material is recovered from the processed photographic material.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: November 16, 1999
    Assignee: Konica Corporation
    Inventors: Tawara Komamura, Shinri Tanaka, Michiko Nagato, Hiroyuki Iizuka, Noritaka Nakayama, Naoshi Kunieda, Hideaki Haraga
  • Silver halide light-sensitive color photographic material
    Patent number: 5981157
    Abstract: A silver halide light-sensitive color photographic material comprising containing a coupler is disclosed.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 9, 1999
    Assignee: Konica Corporation
    Inventors: Shinri Tanaka, Michiko Nagato
  • Manufacturing method of sulfides
    Patent number: 5763618
    Abstract: A method of manufacturing a sulfide comprises the steps of (a) dissolving a thiol in a solvent to form a solution; (b) oxidizing the thiol to a disulfide in the presence of a first oxidizing agent in the solution; (c) reacting the disulfide with a coupler in the presence of a base and a second oxidizing agent, without isolation of said disulfide from the solution, to form a reaction mixture in which the sulfide is produced; and (d) obtaining said sulfide.
    Type: Grant
    Filed: April 29, 1996
    Date of Patent: June 9, 1998
    Assignee: Konica Corporation
    Inventors: Ryuzou Watanabe, Shinri Tanaka, Katsuji Ota, Michiko Nagato, Tomio Horiuchi
  • Silver halide color photographic light-sensitive material
    Patent number: 5616454
    Abstract: A silver halide color photographic light-sensitive material is disclosed. The light-sensitive material comprises a support, provided thereon, a blue-sensitive silver halide emulsion layer, a green-sensitive silver halide emulsion layer and a red-sensitive silver halide emulsion layer, and the green-sensitive emulsion layer contains a coupler represented by the following Formula I; ##STR1## wherein R.sub.1 is a hydrogen atom or a group capable of being released upon reaction with the oxidation product of a color developing agent; R.sub.2 is a chlorine atom or an alkoxyl group; R.sub.3 and R.sub.4 are each independently a hydrogen atom or a substituent, provided that when R.sub.3 is a hydrogen atom, R.sub.4 is a substituent; and R.sub.5, R.sub.6, R.sub.7, R.sub.8 and R.sub.9 are each a halogen atom.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: April 1, 1997
    Assignee: Konica Corporation
    Inventors: Manabu Kaneko, Shinri Tanaka, Michiko Nagato