Patents by Inventor Senzo Sasaoka

Senzo Sasaoka 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: 7267933
    Abstract: An image forming method using a photothermographic material including, on at least one surface of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, in which (1) the photothermographic material is exposed and thermally developed during transportation at a transportation speed of 23 mm/sec or faster, (2) the non-photosensitive organic silver salt contains 30 mol % to 85 mol % of silver behenate and an amount of the time until a leading end of the photothermographic material reaches a thermal development station after a power source for ae thermal developing apparatus is turned on is 15 minutes or less, or (3) a coating amount of silver inf the photothermographic material is 1.9 g/m2 or less and a thermal development time is 12 sec or less.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: September 11, 2007
    Assignee: Fujifilm Corporation
    Inventors: Takayoshi Oyamada, Senzo Sasaoka, Katsutoshi Yamane
  • Publication number: 20040038156
    Abstract: An image forming method using a photothermographic material including, on at least one surface of a support, at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent for silver ions, and a binder, in which (1) the photothermographic material is exposed and thermally developed during transportation at a transportation speed of 23 mm/sec or faster, (2) the non-photosensitive organic silver salt contains 30 mol % to 85 mol % of silver behenate and an amount of the time untill a leading end of the photothermographic material reaches a thermal development station after a power source for ae thermal developing apparatus is turned on is 15 minutes or less, or (3) a coating amount of silver inf the photothermographic material is 1.9 g/m2 or less and a thermal development time is 12 sec or less.
    Type: Application
    Filed: May 30, 2003
    Publication date: February 26, 2004
    Inventors: Takayoshi Oyamada, Senzo Sasaoka, Katsutoshi Yamane
  • Publication number: 20030138739
    Abstract: A photothermographic material comprises: a support; a binder; an organic silver salt; a reducing agent for silver ion; and a photosensitive silver halide grain, wherein said photothermographic material contains a solvent in an amount of from 5 to 1,000 mg/m2 and the intensity of an odor generated from said photothermographic material is from −3 to 1 at 120° C.
    Type: Application
    Filed: September 10, 2002
    Publication date: July 24, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Senzo Sasaoka, Yutaka Tamura
  • Patent number: 5976758
    Abstract: A development processing method which comprises the steps of: imagewise exposing a silver halide photographic light-sensitive material; and developing the exposed photographic material with a developing solution, wherein the silver halide photographic material comprises a support having thereon at least one light-sensitive silver halide emulsion layer, at least one of the silver halide emulsion layer and other hydrophilic colloidal layers containing at least one hydrazine derivative; and wherein the developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5 and contains (1) at least one ascorbic acid developing agent, (2) at least one 1-phenyl-3-pyrazolidone auxiliary developing agent and (3) a compound represented by the following formula (I): ##STR1## wherein R.sub.1 to R.sub.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: November 2, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouta Fukui, Senzo Sasaoka, Kohzaburoh Yamada
  • Patent number: 5888708
    Abstract: A development processing method comprising developing a silver halide photographic material with a developing solution, (i) wherein the silver halide photographic material comprises a support having thereon at least one light-sensitive silver halide emulsion layer and contains: (a) at least two kinds of light-sensitive silver halide emulsions which are each spectrally sensitized and have sensitivities different from each other with respect to a certain exposure wavelength; and (b) at least one hydrazine derivative in at least one of the silver halide emulsion layer and other hydrophilic colloidal layers, and (ii) wherein the developing solution is substantially free from a dihydroxybenzene compound, has a pH of from 9.0 to 10.5 and contains: (1) at least one ascorbic acid developing agent and (2) at least one auxiliary developing agent represented by the following general formula (I): ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.
    Type: Grant
    Filed: January 28, 1998
    Date of Patent: March 30, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Kouta Fukui, Senzo Sasaoka
  • Patent number: 5374499
    Abstract: A silver halide photographic material comprising a support having thereon at least one of a surface latent image type silver halide emulsion layer and other hydrophilic colloid layers is disclosed, in which said at least one of the emulsion layer and other hydrophilic colloid layers contains a compound represented by formula (I): ##STR1## wherein X represents ##STR2## R.sub.1 represents a hydrogen atom or a group capable of being converted to a hydrogen atom on hydrolysis; R.sub.2, R.sub.3 and R.sub.4, which may be the same or different, each represents a hydrogen atom or a substituent group; R.sub.5 and R.sub.
    Type: Grant
    Filed: December 6, 1993
    Date of Patent: December 20, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Morio Yagihara
  • Patent number: 5298373
    Abstract: Silver halide black-and-white photosensitive material is processed with a fixer which contains 0.5 to 2.0 mol/liter of a thiosulfate and 0.003 to 0.3 mol/liter of a meso-ionic compound, the moles of the meso-ionic compound divided by the moles of the thiosulfate being from 0.003 to 0.2. The fixer accelerates fixing speed, enabling rapid processing of photographic material.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: March 29, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Katsumi Hayashi, Kota Fukui, Tetsuro Kojima
  • Patent number: 5272046
    Abstract: There is disclosed a method for rapidly processing a silver halide photographic material with an automatic processing machine for 20 to 60 seconds, the method being excellent fixability and drying characteristics. The fixing solution has:(a) a pH of 5.3 or more,(b) a sulfite ion concentration of 0.05 to 1.0 mole/liter, and(c) a content of an aluminium compound content of 0 to 0.01 mole/liter as a hardener. The coated amount of the gelatin contained in the protective layer provided on the side of the silver halide emulsion layers of the photographic material is 1.0 g/m.sup.2 or less.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: December 21, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Senzo Sasaoka
  • Patent number: 5200298
    Abstract: A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photosensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability: ##STR1## wherein R.sub.1 represents an aliphatic group or an aromatic group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G.sub.1 represents a carbonyl group, a sulfonyl group, a sulfoxy group, ##STR2## or an iminomethylene group; and each of A.sub.1 and A.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: April 6, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Yoshihiro Takagi, Mitsunori Hirano, Senzo Sasaoka
  • Patent number: 5185232
    Abstract: A method of image formation comprising imagewise exposing a silver halide photographic photosensitive material comprising a support having thereon at least two silver halide emulsion layers and which contains a hydrazine compound in the emulsion layers or in another hydrophilic colloid layer wherein the photographic speed of the emulsion layer on the side furthest from the support of the above mentioned silver halide layers is higher by 0.1 to 0.4 logE than the photographic speed of the emulsion layer which is closest to the support, through the support, and developing the imagewise exposed photosensitive material, whereby a high contrast negative image of a gamma at least 8 is obtained.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: February 9, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Senzo Sasaoka
  • Patent number: 5051336
    Abstract: A negative type silver halide photographic material is disclosed. The material comprises a support having provided thereon at least one silver halide emulsion layer containing silver halide grains sensitized with gold and sulfur sensitizers, the emulsion layer or at least one other hydrophilic colloid layer containing at least one high contrast-imparting hydrazine derivative and at least one compound represented by the following general formula (I): ##STR1## wherein Z represents N or C--X wherein X represents a substituted or unsubstituted alkyl or aryl group, Y represents a substituted or unsubstituted alkyl or aryl group, and M represents a hydrogen atom, a metallic atom, or ammonium which may be substituted.
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: September 24, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Senzo Sasaoka, Tetsuo Yoshida
  • Patent number: 4997743
    Abstract: Silver halide photographic material and method of forming an image using the same are disclosed. The material comprises one or more silver halide emulsion layers on a support, with a hydrazine derivative and a developing agent being incorporated in at least one of said emulsion layers. The image forming method comprises performing imagewise exposure of the above-described photographic material and developing said material with a developing solution that contains sulfite ions in a concentration of not less than 0.15 mole per liter and which has a pH within the range of from 9.5 to 12.3, and provides a supercontrasty negative image that has a very contrasty photographic characteristic of a gamma (.gamma.) of 10 or more and which is not highly susceptible to the occurrence of "black spots".
    Type: Grant
    Filed: January 8, 1990
    Date of Patent: March 5, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Nobuaki Inoue, Eiichi Okutsu
  • Patent number: 4996130
    Abstract: A negative type silver halide photographic material is disclosed, which comprises a support having thereon at least one silver halide emulsion layer and at least one other hydrophilic colloidal layer, wherein at least one said silver halide emulsion layer or at least one said other hydrophilic colloidal layer contains a hydrazine derivative and a polyacrylamide derivative.
    Type: Grant
    Filed: March 13, 1990
    Date of Patent: February 26, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shuzo Suga, Masaki Satake, Senzo Sasaoka
  • Patent number: 4957849
    Abstract: A silver halide photographic material is disclosed, which comprises a support having provided thereon at least one silver halide emulsion layer and which contains a hydrazine derivative in the emulsion layer or other hydrophilic colloidal layer, the emulsion layer containing two kinds of monodispersed silver halide grains different from each other in mean grain size, and the smaller sized monodispersed silver halide grains being chemically sensitized.An image-forming method using this photographic material is also disclosed.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: September 18, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Senzo Sasaoka
  • Patent number: 4920029
    Abstract: A negative type silver halide photographic material and a process for forming a super high contrast negative image using said material are described. This photographic material comprises a support having provided thereon at least one silver halide emulsion layer which has a substantial influence upon image density and at least one light-insensitive hydrophilic colloid layer, wherein a hydrophilic colloid layer other than said silver halide emulsion layer contains a hydrazine derivative in a non-diffusing condition. With this photographic material, a super high contrast negative image can be obtained without decreasing sensitivity and gamma by the use of a developer containing not less than 0.15 mol/liter of sulfite ions and having a pH of from 10.5 to 12.3.
    Type: Grant
    Filed: August 23, 1988
    Date of Patent: April 24, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Senzo Sasaoka, Yoshio Inagaki, Tetsuro Kojima, Morio Yagihara
  • Patent number: 4920034
    Abstract: A silver halide photographic material and an image forming method using such material are described, said material comprising a surface latent image forming silver halide emulsion layer unit on a support, and containing a hydrazine compound in at least one of said emulsion layer unit and other constituent layers, said emulsion layer unit being composed of at least two layers, with the silver halide emulsion present in a fine-grained low-sensitivity emulsion layer having a minimum average grain size being not more than 80% of the average grain size of a coarse-grained high-sensitivity silver halide emulsion having the maximum average grain size, and said silver halide photographic material attains a contrast of 10 or more in terms of gamma value when a developer containing at least 0.15 mol/liter of sulfite ions and having a pH of from 9.5 to 12.3 is used.
    Type: Grant
    Filed: May 15, 1989
    Date of Patent: April 24, 1990
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Nobuaki Inoue
  • Patent number: 4873173
    Abstract: A method of forming an image is provided. The method comprises the steps of (a) imagewise exposing a photographic material which comprises a support having provided thereon at least one light-sensitive silver halide emulsion layer and which contains a hydrazine compound represented by the following general formula (I) in the emulsion layer or a hydrophilic colloid layer adjacent thereto, the photographic material being designed so that a difference in sensitivity (sensitivity being defined as log E corresponding to the density of fog+2.0) between (1) the photographic material is development-processed with a developing solution having a sulfite ion concentration of 0.15 mole/l or more, a potassium ion concentration of 0.2 mole/l or more and a pH value ranging from 10.5 to 12.3 and (2) the photographic material is development-processed with the same developing solution as described above, except that the pH value was lowered by 1.0, (.DELTA.log E), is 0.
    Type: Grant
    Filed: October 21, 1987
    Date of Patent: October 10, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Tetsuo Yoshida, Nobuaki Inoue
  • Patent number: 4849319
    Abstract: A negative silver halide photographic material comprising a support and at least one silver halide emulsion layer on the support, the emulsion layer or other hydrophilic colloid layer containing a hydrazine derivative, wherein the photographic material further contains an acid polymer and in which the pH of the surface of the photographic material is not more than 5.8. Also, a method for forming a superhigh contrast negative image using the above photographic material is disclosed.
    Type: Grant
    Filed: November 20, 1987
    Date of Patent: July 18, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Senzo Sasaoka, Hiroshi Hayashi
  • Patent number: 4839259
    Abstract: Silver halide photographic material and method of forming an image using the same are disclosed. The material comprises one or more silver halide emulsion layers on a support, with a hydrazine derivative and a developing agent being incorporated in at least one of said emulsion layers. The image forming method comprises performing imagewise exposure of the above-described photographic material and developing said material with a developing solution that contains sulfite ions in a concentration of not less than 0.15 mole per liter and which has a pH within the range of from 9.5 to 12.3, and provides a supercontrasty negative image that has a very contrasty photographic characteristic of a gamma (.gamma.) of 10 or more and which is not highly susceptible to the occurrence of "black spots".
    Type: Grant
    Filed: December 9, 1987
    Date of Patent: June 13, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Senzo Sasaoka, Nobuaki Inoue, Eiichi Okutsu
  • Patent number: 4824774
    Abstract: A silver halide negative photographic material is described, comprising a support, at least one silver halide emulsion layer, and one or more light-insensitive hydrophilic colloid layers, wherein said silver halide emulsion layer or said light-insensitive hydrophilic colloid layer contains a hydrazine derivative, and the photographic material has a film surface pH not higher than 5.8 on the side of said emulsion layer inclusive of said light-insensitive hydrophilic colloid layer; in another aspect, this invention is directed to a method for forming an ultrahigh contrast negative image, comprising exposing said photographic material imagewise, followed by development processing of the same with a developer containing at least 0.15 mol/liter of sulfite ion and having a pH of from 10.5 to 12.3.
    Type: Grant
    Filed: September 14, 1987
    Date of Patent: April 25, 1989
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Nobuaki Inoue, Senzo Sasaoka