Patents by Inventor Shuzo Suga
Shuzo Suga 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).
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Patent number: 5942384Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein at least 30 mol % of silver halide grains contained in the emulsion of the emulsion layer are silver chloride, the emulsion contains not more than 1.times.10.sup.-6 mol per mol of silver of a rhodium compound and/or not more than 1.times.10.sup.-5 mol per mol of silver of an iridium compound, and the silver halide grains have been selenium-sensitized. There is also disclosed a method for processing the silver halide photographic material.Type: GrantFiled: June 7, 1995Date of Patent: August 24, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Tsutomu Arai, Koichi Kuno, Yasuhiro Okamoto, Shuzo Suga
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Patent number: 5589325Abstract: A silver halide photographic material comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer, wherein the emulsion is spectrally sensitized with at least one compound selected from the compounds represented by the following formulae (1) and (2) and contains a compound represented by the following formula (5).Type: GrantFiled: January 22, 1996Date of Patent: December 31, 1996Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Kuno, Shuzo Suga
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Patent number: 5464734Abstract: Disclosed is a silver halide photographic material containing a compound of formula (1) or (2): ##STR1## where DYE represents a methine dye residue; G and G.sup.- each represent a substituent for the methine dye residue, and are represented by formulae (3) and (4), respectively; and n represents an integer of from 1 to 6.--T.sup.1 --G.sup.1 NHG.sup.2 (3)--T.sup.1 --G.sup.1 N.sup.- G.sup.2 (4)where T.sup.1 represents a divalent linking group; G.sup.1 represents a carbonyl group, a sulfinyl group, or a sulfonyl group; G.sup.2 represents --CO--T.sup.2 --, --SO--T.sup.2, --SO.sub.2 --T.sup.2, or a cyano group; and T.sup.2 represents a monovalent group. The spectral sensitivity of the material is high, and the material has few residual color after processed.Type: GrantFiled: June 8, 1994Date of Patent: November 7, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshio Inagaki, Shuzo Suga
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Patent number: 5236807Abstract: A method for forming an image is disclosed, comprising imagewise exposing a negatively working silver halide photographic material comprising a support having thereon at least one silver halide emulsion layer with light having a wavelength of from 460 to 600 nm and containing substantially no light having a wavelength of 360 nm or less, said emulsion layer containing at least one sensitizing dye having an absorption maximum (.lambda..sub.max) at a wavelength of form 450 nm to 580 nm, and said emulsion layer or other hydrophilic colloidal layer containing at least one hydrazine derivative. The method provides an image having excellent image quality either in enlargement or reduction work without causing reduction in sensitivity or inducing black pepper.Type: GrantFiled: March 27, 1992Date of Patent: August 17, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Inoue, Tetsuo Yoshida, Shuzo Suga, Hiroyuki Goto
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Patent number: 5227286Abstract: A silver halide photographic element with high sensitivity and less processing reliance in a high-illuminance and short-time light exposure which can be processed quickly is provided. The photographic element comprises at least one light-sensitive silver halide emulsion layer which has silver halide grains containing an iridium compound and at least one light-insensitive hydrophilic colloid layer.Type: GrantFiled: May 15, 1991Date of Patent: July 13, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Koichi Kuno, Shuzo Suga
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Patent number: 5015567Abstract: A silver halide photographic emulsion is subjected to sulfur or gold-sulfur sensitization in the presence of a combination of (1) at least one of an organic thioether compound or a tetrasubstituted thiourea and (2) a nitrogen-containing heterocyclic compound, to achieve the prevention of pressure desensitization and safelight aptitude deterioration.Type: GrantFiled: February 10, 1989Date of Patent: May 14, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Shuzo Suga, Tadao Shishido, Hiroyuki Mifune, Yoshiro Kawashima
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Patent number: 4996130Abstract: 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: GrantFiled: March 13, 1990Date of Patent: February 26, 1991Assignee: Fuji Photo Film Co., Ltd.Inventors: Shuzo Suga, Masaki Satake, Senzo Sasaoka
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Patent number: 4891307Abstract: A silver halide photographic material is disclosed. The material is comprised of a support having thereon at least one silver halide emulsion layer, wherein at least one of the silver halide emulsion layer and another constituent layer contains a fluorine-containing nonionic surface active agent, a fluorine-containing ionic surface active agent and a fluorine-free nonionic surface active agent.Type: GrantFiled: June 13, 1989Date of Patent: January 2, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuo Mukunoki, Yukio Maekawa, Shuzo Suga
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Patent number: 4873181Abstract: A silver halide photographic material is described, comprising a support bearing at least one silver halide photographic emulsion layer and at least one auxiliary layer on one side or both sides thereof, wherein the silver halide photographic emulsion layer is a layer made of a light-sensitive silver halide emulsion containing silver iodide and an internally fogged silver halide emulsion, or is composed of a layer made of the light-sensitive silver halide emulsion containing silver iodide and a layer made of the internally fogged silver halide emulsion, and the auxiliary layer contains substantially non-light-sensitive silver halide grains having an average grain size of not more than 0.5 .mu.m.Type: GrantFiled: May 31, 1988Date of Patent: October 10, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Miyasaka, Shuzo Suga
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Patent number: 4859576Abstract: A silver halide photographic material having a high covering power with improved pressure resistance and antistatic properties upon development, which comprises at least one silver halide photographic emulsion layer disposed on at least one side of a support, wherein at least one of the silver halide photographic emulsion layer(s) contains a photosensitive silver halide emulsion containing silver iodide and an internally fogged silver halide emulsion, and at least one of the silver halide photographic emulsion layer(s) and an auxiliary layer(s) which is disposed on the same side of the support as that of the support having said emulsion containing silver iodide contains at least one polyoxyethylenic surface active agent selected from the group consisting of compounds represented by formula (I) and (II) ##STR1## wherein R.sub.1, R.sub.2, R.sub.6, R.sub.8, R.sub.10, and R.sub.Type: GrantFiled: March 29, 1988Date of Patent: August 22, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Nobuaki Miyasaka, Shigeki Yokoyama, Shuzo Suga, Takashi Naoi, Masaki Satake
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Patent number: 4853323Abstract: The present invention relates to a silver halide emulsion containing a thiocyanate and having a high sensitivity in particular to light of a low illuminance. According to the present invention, a silver halide emulsion is provided, wherein the IR absorbance at 2052 cm.sup.-1 due to thiocyanate ion contained in the silver halide grain of the emulsion is observed and a tricarboxylic acid or its salt is contained in the emulsion.Type: GrantFiled: October 15, 1986Date of Patent: August 1, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideo Ikeda, Shuzo Suga, Nobuaki Miyasaka
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Patent number: 4818669Abstract: This invention relates to a silver halide emulsion containing halogen conversion-type silver halide grains and light sensitive material comprising such as emulsion. The grains are selected from the group consisting of halogen conversion-type silver chlorobromide grains, halogen conversion-type silver iodobromide grains and halogen conversion-type chloroiodobromide grains, the grains having substantially no surface sensitivity, the average grain size thereof being not more than 0.30 micron, and the grains containing from 0 to 4 mol % of silver iodide.The grains have particularly high ability to trap iodide ions so that light-sensitive material comprising the emulsion containing the grains have law dependence on formulation of developing solution and improved properties in connection with sensitivity, fog, gamma, maximum density.Type: GrantFiled: April 29, 1986Date of Patent: April 4, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideo Ikeda, Shuzo Suga
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Patent number: 4647528Abstract: A silver halide photographic material having on a support at least one silver halide emulsion layer which contains light-sensitive tabular silver halide grains, with a ratio of grain diameter to grain thickness of 5 or more and a polymeric hardener. The silver halide photographic material has both increased covering power and scratching resistance, and is suitable for high-temperature rapid development processing.Type: GrantFiled: September 17, 1984Date of Patent: March 3, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Sumito Yamada, Taku Nakamura, Shuzo Suga, Hiroshi Kawamoto