Patents by Inventor Masahiro Okada

Masahiro Okada 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: 4818659
    Abstract: A silver halide photographic material for use in a bright room is disclosed comprising a support having thereon at least two silver halide emulsion layers, each of the emulsion layers having a different sensitivity and comprising silver chloride grains or silver chlorobromide grains having at least about 80 mol % silver chloride, each of the silver halide emulsions layers containing from about 1.times.10.sup.-7 mol to about 1.times.10.sup.-4 mol of a rhodium salt per mol of silver, wherein the sensitivity of the lower emulsion layer (the emulsion layer coated nearer to the support) is higher than the sensitivity of the upper emulsion layer (the emulsion layer coated farther from the support) and at least one of the silver halide emulsion layers or different hydrophilic colloid layers contains a hydrazine derivative and at least one of the silver halide emulsion layers of different hydrophilic colloid layers contains a dry compound having a .sup..lambda. max of from about 400 nm to about 550 nm.
    Type: Grant
    Filed: April 7, 1987
    Date of Patent: April 4, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Kimitaka Kameoka, Masahiro Okada
  • Patent number: 4810780
    Abstract: Protein having a phospholipase A.sub.2 inhibitory activity which has the nature to be induced from cells upon administration of glucocorticoid and has a phospholipase A.sub.2 inhibitory activity.
    Type: Grant
    Filed: September 4, 1986
    Date of Patent: March 7, 1989
    Assignee: Teijin Limited
    Inventors: Atsushi Imaizumi, Takashi Kamimura, Yorimasa Suwa, Masahiro Okada
  • Patent number: 4809529
    Abstract: A flaring apparatus including at least one of die member positional adjustment apparatus and a defective rim element ejecting apparatus. The positional adjustment apparatus includes a connecting shaft provided between a die member mounting block and a link mechanism for moving the mounting block. The connecting shaft has shaft portions, axes of which are radially offset from each other. By rotating the connecting shaft, the die member position can be adjusted. Therefore, there is no need to provide a shim between the die member and the mounting block. The defective rim element ejecting apparatus includes a pressure sensing switch which can detect an increase in pressure within a space defined by a rim element and the die members during flaring.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: March 7, 1989
    Assignees: Topy Kogyo Kabushiki Kaisha, Watanabe Tekko Kabushiki Kaisha
    Inventors: Yusaku Shinozawa, Atuyoshi Komatu, Masahiro Okada, Hiroshi Yamada, Masatoshi Fujita
  • Patent number: 4803149
    Abstract: A silver halide photographic material for a bright room and a process for producing the photographic material are disclosed, wherein the silver halide photographic material for a bright room comprises a support having thereon at least one silver halide emulsion layer containing silver chloride grains or silver chlorobromide grains containing at least 80 mol % silver chloride, at least one of said silver halide emulsion layer or another hydrophilic colloid layer(s) present containing a yellow dye making the silver halide photographic material substantially insensitive to visible light of 420 n.m. or more and an ultraviolet absorbent in an amount sufficient to reduce the specific sensitivity of the silver halide emulsion at 360 n.m. to 1/2 or lower than 1/2 thereof in the absence of the ultraviolet absorbent, and the .gamma. value of the silver halide photographic material being at least 10.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: February 7, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Masahiro Okada
  • Patent number: 4764455
    Abstract: A color image-forming process is described, for a silver halide color photographic material comprising a support having provided thereon at least one red-sensitive silver halide emulsion layer, at least one green-sensitive silver halide emulsion layer, and at least one blue-sensitive silver halide emulsion layer, which process comprises incorporating in the photographic material a yellow dye represented by formula (I) and processing the photographic material using a bleach-fixing solution containing a ferric complex of aminopolycarboxylic acid and a thiosulfate ##STR1## wherein R.sub.1 and R.sub.2 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, a hydroxy group, a carboxy group, a substituted amino group, a carbamoyl group, a sulfamoyl group, a nitro group or an alkoxycarbonyl group;R.sub.3 and R.sub.
    Type: Grant
    Filed: August 6, 1986
    Date of Patent: August 16, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Jun Arakawa, Masahiro Okada, Takatoshi Ishikawa
  • Patent number: 4762769
    Abstract: A silver halide photographic material which has at least one silver halide emulsion layer comprising silver chloride or silver chlorobromide grains which has a bromide content of 5 mol % or less, and containing a rhodium salt in an amount of from 1.times.10.sup.-6 to 5.times.10.sup.-4 mole per mole of silver in said layer, and contains both a hydrazine derivative and a dye having an absorption peak in the wavelength region of from 400 nm to 550 nm in at least one of said emulsion layer another hydrophilic colloid layer, to thereby control the ratio of sensitivity at 360 nm to sensitivity at 400 nm (S.sub.360 /S.sub.400 ratio) to not less than 30, thereby achieving ultra-high contrast, high sensitivity, and a satisfactory aptitude for safelight.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: August 9, 1988
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Takahashi, Ken-ichi Kuwabara, Masahiro Okada
  • Patent number: 4419389
    Abstract: A method for manufacturing a composite material which includes carbon material in a matrix metal by first applying tetraisopropyltitanate to the carbon material so as to wet it, next drying the carbon material which is wetted with the tetraisopropyltitanate, and then combining the carbon material with the matrix metal. This drying may be done by heating up the carbon material which is wetted with the tetraisopropyltitanate to a temperature of 50.degree. C. to 200.degree. C. in the atmosphere. The tetraisopropyltitanate may be dissolved in ethanol when it is being applied to the carbon material. The matrix metal may be a metal selected from the group consisting of aluminum, magnesium, aluminum alloy, and magnesium alloy.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: December 6, 1983
    Assignees: Toray Industries, Toyota Jidosha Kabushiki Kaisha
    Inventors: Tadashi Donomoto, Atsuo Tanaka, Masahiro Okada, Atsushi Kitamura, Tetsuyuki Kyono