Patents by Inventor Takao Masuda

Takao Masuda 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: 4170480
    Abstract: A thermally developable light-sensitive material comprising a support having therein or in at least one layer thereon (a) an organic silver salt, (b) a photocatalyst, and (c) a reducing agent, and additionally (d) at least one 1,2,4-triazole compound.
    Type: Grant
    Filed: September 7, 1977
    Date of Patent: October 9, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda, Harumi Katsuyama, Nobuyoshi Sekikawa, Tadao Shishido, Nobuo Sakai
  • Patent number: 4157289
    Abstract: A process for preparing slightly soluble silver salt grains by mixing a solution or dispersion of a silver salt forming agent as a first liquid with a solution or dispersion of a silver ion-providing agent as a second liquid while controlling the electrode potential of the mixture of the first liquid and the second liquid using a measuring electrode and a reference electrode to produce the slightly soluble silver halide grains of specific characteristics depending upon the control of the electrode potential, the improvement which comprises the reference electrode comprising an internal electrode of a metal immersed in an internal solution of a metal salt of the metal of the internal electrode and an electrolyte, which metal salt and electrolyte do not release halide ions in the same liquid present as the major component in either of the first liquid or the second liquid.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: June 5, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda
  • Patent number: 4156611
    Abstract: A heat-developable photosensitive material which comprises a support having thereon at least one layer containing (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a compound which forms a photosensitive silver halide, (c) a reducing agent, and (d) at least one sensitizer selected from the group consisting of compounds represented by the formulae (I) and (II): ##STR1## wherein R represents an unsubstituted or substituted alkyl group having 1 to 4 carbon atoms or an aryl group; and Q represents a group of atoms necessary to complete a rhodanine nucleus, a thiohydantoin nucleus or a 2-thio-2,4-oxazolidine-dione nucleus and wherein said compound represented by the formulae (I) and (II) include at least one carboxyl group as a substituent, and (e) a binder.
    Type: Grant
    Filed: March 15, 1977
    Date of Patent: May 29, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda, Akira Ogawa, Akira Sato, Yuji Mihara
  • Patent number: 4152162
    Abstract: A thermally developable light-sensitive material comprising a support having therein or thereon a mixture of (a) an organic silver salt and (b) a photocatalyst, wherein the organic silver salt (a) is a mixture of (i) at least one organic silver salt selected from the group consisting of silver stearate, silver arachidate, silver behenate and silver lignocerate and (ii) at least one organic silver salt of straight chain aliphatic carboxylic acid having an odd number of 25 or more carbon atoms in an amount of about 5 mol % to about 50 mol % based on the organic silver salt (i), and additionally (c) a reducing agent with the mixture of the organic silver salt (a) and photocatalyst (b) or adjacent the mixture of the organic silver salt (a) and the photocatalyst (b).
    Type: Grant
    Filed: September 9, 1977
    Date of Patent: May 1, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takao Masuda, Shinpei Ikenoue, Tomoyuki Kobayashi
  • Patent number: 4152160
    Abstract: A thermally developable light-sensitive material with improved storage stability and a minimized thermal fog without an increase in both light discoloration and dark discoloration which comprises a support and having therein or in at least one layer thereon at least (a) an organic carboxylic acid silver salt comprising about 50 mol% or more of silver behenate, (b) a photocatalyst and (c) a reducing agent, and with the material containing (d) at least one compound (1) represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3, which may be the same or different, each represents a hydrogen atom or a substituent selected from the group consisting of a nitro group, a cyano group and a halogen atom, with the proviso that R.sub.1, R.sub.2 and R.sub.3 are not all simultaneously a hydrogen atom, and (2) having a half-neutralization point of from about 40 mV to about 140 mV above the half-neutralization point of benzoic acid in isopropanol.
    Type: Grant
    Filed: April 5, 1978
    Date of Patent: May 1, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikienoue, Takao Masuda, Nobuyoshi Sekikawa
  • Patent number: 4144072
    Abstract: A thermally developable light-sensitive material containing at least (a) an organic silver salt, (b) a photocatalyst and (c) a reducing agent in a support and/or in one or more layers thereon and, additionally containing (d) at least one phthalazinone, and (e) at least one phthalimide, having improved shelf life particularly at high humidity, providing pure black tone images, and further providing a high speed upon heat development.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: March 13, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda, Nobuyoshi Sekikawa
  • Patent number: 4140532
    Abstract: A thermally developable light-sensitive material comprising a support and containing at least (a) an organic silver salt, (b) a photocatalyst, (c) a reducing agent and (d) a color toning agent in the support or in at least one layer provided on the support, wherein the color toning agent is at least one 2H-1,3-benzothiazin-2,4(3H)-dione, e.g., having the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: December 14, 1977
    Date of Patent: February 20, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Hideo Sato, Nobuyoshi Sekikawa, Toshinao Ukai, Takao Masuda
  • Patent number: 4128428
    Abstract: A heat developable light-sensitive material comprising a support with at least one layer thereon and containing at least (a) an organic silver salt, (b) light-sensitive silver halide or a silver halide-forming component and (c) a reducing agent with (d) an iron family compound in at least one layer on the support.
    Type: Grant
    Filed: January 19, 1977
    Date of Patent: December 5, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda, Nobuo Suzuki, Toshiharu Tanaka, Kenji Sashihara
  • Patent number: 4125403
    Abstract: A heat developable light sensitive material which comprises a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light sensitive silver halide or a component capable of producing a light sensitive silver halide and (c) a reducing agent and additionally contains (d) at least one phthalazinone and (e) at least one compound selected from benzoxazinediones and quinazolinediones in a molar ratio of the amount of the component (e) to that of the component (d) smaller than about 1:1 (i.e. molar ratio (e)/(d) 1) in at least one of the layers containing components (a) to (c), in a specific layer additionally provided on the support other than the layers containing components (a) to (c), or in the support to result in the production of images of a pure black tone and in improvements in shelf-life under high humidity and the developing speed.
    Type: Grant
    Filed: June 27, 1977
    Date of Patent: November 14, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Harumi Katsuyama, Takao Masuda
  • Patent number: 4120728
    Abstract: A thermally developable light-sensitive material comprising a support having thereon at least one layer containing (a) an organic silver salt; (b) a catalytic amount of a light-sensitive silver halide prepared by mixing a solution of a compound capable of releasing a halide ion and a solution of a compound capable of releasing silver ion in the presence of a surface active agent; (c) a reducing agent and (d) a binder.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: October 17, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda
  • Patent number: 4102312
    Abstract: A thermally developable light-sensitive material comprising a support having thereon or therein at least one layer containing at least (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide, and (c) a reducing agent, which contains (d) a palladium-containing compound in at least one layer provided on or in the support.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: July 25, 1978
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Kenji Sashihara, Takao Masuda
  • Patent number: 4076539
    Abstract: A process for preparing a silver halide dispersion which comprises reacting a solution of a compound capable of releasing a halogen ion with a solution of a compound capable of releasing a silver ion in the presence of a surface active agent, said silver halide also having been dispersed in a mixture of water and an organic solvent slightly soluble in water present during or after the preparation of said silver halide dispersion.
    Type: Grant
    Filed: June 7, 1976
    Date of Patent: February 28, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenoue, Takao Masuda
  • Patent number: 4076534
    Abstract: A heat developable light-sensitive material comprising a support having thereon at least one light-sensitive layer containing (1) an oxidation-reduction image-forming combination of (a) a silver salt oxidizing agent and (b) a reducing agent and (2) a catalytic amount of a light-sensitive silver halide or a compound capable of reacting with the silver salt (a) to form a light-sensitive silver halide, the light-sensitive layer further containing (3) at least one specific phthalazinone compound. The development of the above light-sensitive material is carried out simply by heating the material at a temperature of about 90.degree. to 180.degree. C. for 1 to 60 seconds after imagewise exposure. An image of black tone can be obtained without contaminating the developing machine.
    Type: Grant
    Filed: July 26, 1976
    Date of Patent: February 28, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhiro Noguchi, Nobuyoshi Sekikawa, Kenji Sashihara, Takao Masuda
  • Patent number: 4055432
    Abstract: A thermodevelopable photographic material having a reduced tendency to fog formation by heat, comprising a support and at least one layer containing (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a compound capable of forming a photosensitive silver halide by reaction with the organic silver salt (a), (c) a binder, (d) a reducing agent, and (e) a specific bromine-containing heterocyclic compound. In order to increase the transparency of the thermodevelopable photographic layer of the material and the density of the image and to improve its storability, a topcoating of polymer can be formed on the photographic layer.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: October 25, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takao Masuda, Keiichi Adachi
  • Patent number: 4039334
    Abstract: In a thermally developable light-sensitive material comprising a support having therein or thereon at least one layer containing at least (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide and (c) a reducing agent, the improvement wherein at least one layer provided on the support comprises, or the support is impregnated with, (d) at least one member selected from the group consisting of rosin of an acid value more than about 100, one or more diterpene acids or a mixture thereof in an amount sufficient to decrease heat fogging and to improve the storability of light-sensitive materials.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: August 2, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shinpei Ikenque, Takao Masuda, Yuzo Iwata
  • Patent number: 4030931
    Abstract: A heat developable light-sensitive material comprising a support having thereon or therein at least (a) an organic silver salt, (b) a light-sensitive silver halide or a light-sensitive silver halide-forming component and (c) as a reducing agent at least one ester selected from the group consisting of (1) esters of carboxylic acids derived from phenol derivatives in which at least one of the o-positions thereof is substituted, preferably substituted with a bulky group, and mono- or poly-hydric alcohols, and (2) esters of alcohols derived from polyhydric phenols in which at least one of the o-positions thereof is substituted, preferably substituted with a bulky group, and mono- or polycarboxylic acids, to reduce the thermal fog produced at the background after heat development processing, and to increase the whiteness of the unexposed areas and the stability to normal room illumination.
    Type: Grant
    Filed: May 19, 1975
    Date of Patent: June 21, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhiro Noguchi, Toshinao Ukai, Kenji Sashihara, Takao Masuda
  • Patent number: 4030930
    Abstract: A heat-developable light-sensitive material comprising a support having thereon at least one layer containing (a) an organic silver salt oxidizing agent; (b) a catalytic amount of a light-sensitive silver halide or a compound capable of forming a light-sensitive silver halide through reaction with the organic silver salt component (a); (c) a reducing agent; and (d) at least one compound represented by the following general formulae (I) to (III) ##STR1## in which A and B each represents different substituents selected from the group consisting of an amino group and a --OX group; X represents a hydrogen atom, an alkali metal atom, a silver atom, a mercury atom or a gold atom; R.sub.1 and R.sub.2 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aralkyl group, an allyl group, an acyl group, an aryl group or an aryloxy group; and R.sub.3, R.sub.4 and R.sub.5 each represents a hydrogen atom, a halogen atom or an alkyl group.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: June 21, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenji Sashihara, Takao Masuda, Yasuhiro Noguchi, Nobuyoshi Sekikawa, Tadao Shishido
  • Patent number: 4028129
    Abstract: A heat-developable photosensitive material which comprises a support having one or more layers thereon containing at least (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a component capable of forming a photosensitive silver halide, (c) a reducing agent and (d) at least one of an inorganic peroxide and a peroxodisulfate.
    Type: Grant
    Filed: January 8, 1975
    Date of Patent: June 7, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuo Suzuki, Yasuhiro Noguchi, Takao Masuda
  • Patent number: 4021249
    Abstract: A heat developable light-sensitive material having reduced fog, increased whiteness, and stability to normal room illumination comprising a support having therein or in one or more layers thereon (a) an organic silver salt, (b) a light-sensitive silver halide or a component capable of forming a light-sensitive silver halide upon reaction with the organic silver salt (a), and (c) as a reducing agent an s-triazine-2,4,6-(1H, 3H, 5H)-trione substituted with a phenol derivative (having a substituted group in at least one of the o-positions thereof with respect to the hydroxyl group) in at least one of the 1-, 3- or 5-positions.
    Type: Grant
    Filed: September 12, 1975
    Date of Patent: May 3, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yasuhiro Noguchi, Toshinao Ukai, Kenji Sashihara, Takao Masuda
  • Patent number: 4021250
    Abstract: A thermally developable photosensitive material comprising a support having thereon in one or more layers, (a) an organic silver salt, (b) a catalytic amount of a photosensitive silver halide or a compound capable of forming photosensitive silver halide, (c) a reducing agent, (d) a binder and (e) at least one compound represented by the following general formula (I), ##STR1## wherein R.sub.1 and R.sub.2 each is an alkyl group or an aralkyl group; and R.sub.3 is a hydrogen atom, an alkyl group, a chloroanilino group, a benzyloxy group, a 2-oxo-1-(N-phenylcarbamoyl)propyl group or a substituted phenyl group having one or more of a chlorine atom, an alkyl group, an amino group, an alkylamino group and a dialkylamino group as substituents; the following general formula (II), ##STR2## wherein R.sub.4 is a ##STR3## group, a ##STR4## group or a --NH(CH.sub.2).sub.n --NH-- group; and n is an integer of 1 to 5; or the following general formula (III), ##STR5## wherein R.sub.
    Type: Grant
    Filed: October 1, 1974
    Date of Patent: May 3, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kenji Sashihara, Takao Masuda, Hiroshi Yamashita, Yasuhiro Noguchi