Patents by Inventor Haruo Takei
Haruo Takei 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: 5424442Abstract: A water-soluble methine compound represented by the following general formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents a non-metallic atomic group required for forming a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl group; Q.sub.1 and Q.sub.2 each represents an atomic group required, in combination, for forming a 4-thiazolidinone ring, a 5-thiazolidinone ring, a 4-imidazolidinone ring, a 4-oxazolidinone ring, a 5-oxazolidinone ring, a 5-imidazolidinone ring or a 4-dithiolanone ring; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5, which may be the same or different, each represents a methine group; R represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; m represents 1 or 2; i and h each represents 0 or 1; l represents 1 or 2; and j and k each represents 0, 1, 2 or 3.Type: GrantFiled: June 18, 1993Date of Patent: June 13, 1995Assignee: Fuji Photo Film Co., Ltd.Inventors: Keizo Koya, Toshinao Ukai, Haruo Takei
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Patent number: 5250692Abstract: A water-soluble methine compound represented by the following general formula (I): ##STR1## wherein Z.sub.1 and Z.sub.2, which may be the same or different, each represents a non-metallic atomic group required for forming a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R.sub.1 and R.sub.2, which may be the same or different, each represents an alkyl group; Q.sub.1 and Q.sub.2 each represents an atomic group required, in combination, for forming a 4-thiazolidinone ring, a 5-thiazolidinone ring, a 4-imidazolidinone ring, a 4-oxazolidinone ring, a 5-oxazolidinone ring, a 5-imidazolidinone ring or a 4-dithiolanone ring; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5, which may be the same or different, each represents a methine group; R represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; m represents 1 or 2; i and h each represents 0 or 1; l represents 1 or 2; and j and k each represents 0, 1, 2 or 3.Type: GrantFiled: April 18, 1991Date of Patent: October 5, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Keizo Koya, Toshinao Ukai, Haruo Takei
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Patent number: 5192654Abstract: A silver halide photographic emulsion including a spectrally sensitizing dye and at least one compound represented by general formula [I] or general formula [II] are disclosed. ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.4 ', R.sub.5, R.sub.5 ', R.sub.6, R.sub.7, R.sub.8, R.sub.9, R.sub.10, R.sub.11 and R.sub.12 represent hydrogen atoms or univalent organic residual groups.Type: GrantFiled: December 4, 1991Date of Patent: March 9, 1993Assignee: Fuji Photo Film Co., Ltd.Inventors: Takanori Hioki, Haruo Takei
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Patent number: 4971889Abstract: A silver halide photographic emulsion containing at least one compound represented by following formula (I):Dye--L--Hyd (I)wherein Dye represents a chromophore-containing dye residue shown by following formula (II); Hyd represents a hydrazine residue one of the two nitrogen atoms of which is substituted by a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or an alkilydene group and L represents a divalent linkage group of bonding Dye and Hyd; ##STR1## wherein R and R.sub.1, which may be the same or different, each represents an alkyl group; Z and Z.sub.1, which may be the same or different, each represents an atomic group necessary for forming a 5- or 6-membered heterocyclic ring; Q represents an atomic group necessary for forming a 5- or 6-membered carbon ring or a 5- or 6-membered heterocyclic ring; A represents an oxygen atom or a sulfur atom; and n, d, and m each represents 0 or 1.Type: GrantFiled: September 1, 1989Date of Patent: November 20, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ikeda, Haruo Takei, Satoru Takimoto, Masaki Okazaki
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Patent number: 4917997Abstract: A silver halide photographic emulsion comprising a silver halide emulsion, at least one ascorbic acid compound, a bisaminostilbene compound substituted by a pyrimidine derivative, and at least one sensitizing dye as described herein, exhibits an increased inhibition of desensitization due to the use of a sensitizing dye and an increase in the spectral sensitivity of the photographic emulsion.Type: GrantFiled: September 12, 1988Date of Patent: April 17, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ikeda, Haruo Takei
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Patent number: 4897343Abstract: A spectrally sensitized silver halide photographic emulsion is disclosed, which comprises at least one alkali metal sulfite compound and at least one ascorbic acid compound.Type: GrantFiled: May 11, 1988Date of Patent: January 30, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ikeda, Haruo Takei, Shunichi Aida
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Patent number: 4814265Abstract: A silver halide photographic light-sensitive material containing at least one methine dye which consists of an azulene nucleus, at least one of 10 carbon atoms of which is replaced by chalcogen atom(s) or nitrogen atom(s), and further whose 7-membered ring part is substituted with a methine bond having at the terminal an auxochrome which forms a conjugated resonance chromophore together with 10.pi. electron system of the nucleus is provided.Silver halide photographic light-sensitive materials of the invention are spectrally sensitized in long wavelength region, and have improved photographic performances such as sharpness and color resolution.Type: GrantFiled: February 26, 1988Date of Patent: March 21, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Takanori Hioki, Haruo Takei
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Patent number: 4800154Abstract: A silver halide photographic emulsion comprising at least one spectral sensitizing dye having the following general formula (I):Dye--J.sup.1 --CONH--J.sup.2 --NHNHG--R (I)wherein Dye represents a dye residue capable of becoming a spectral sensitizing dye; J.sup.1 represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted aralkylene group, or a substituted or unsubstituted alkarylene group; J.sup.2 represents a substituted or unsubstituted arylene group; R represents hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or a substituted or unsubstituted iminomethylene group.Type: GrantFiled: October 16, 1986Date of Patent: January 24, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaki Okazaki, Haruo Takei
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Patent number: 4724201Abstract: A photoresponsive material containing a dye compound having a cyclodextrin or its derivative as a substituent. The photoresponsive material exhibits increased light absorptivity by increasing the amount of spectral sensitizer, the dye compound. The photoresponsive material is useful as a photographic emulsion and the like.Type: GrantFiled: April 30, 1986Date of Patent: February 9, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaki Okazaki, Akihiko Ikegawa, Haruo Takei
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Patent number: 4717650Abstract: A silver halide photographic emulsion having a high spectral-sensitivity in a red-color wavelength range, especially within a wavelength range of from 600 nm to 690 nm, is disclosed, which contains one or more sensitizing dyes represented by formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents an alkyl group, a substituted alkyl group, or an alkenyl group;V.sub.1, V.sub.2, V.sub.3, and V.sub.4 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an acyl group, an acyloxy group, an alkoxycarbonyl group, a carboxyl group, an alkoxysulfonyl group, a cyano group, or a trifluoromethyl group;Q represents an alkyl group or an aralkyl group;X.sup..crclbar. represents an anion; andm is 1 or 2, provided that when the dye forms an internal salt, m is 1.Type: GrantFiled: March 6, 1986Date of Patent: January 5, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ikeda, Haruo Takei, Masaki Okazaki, Keizo Kimura
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Patent number: 4634653Abstract: A direct positive silver halide photographic emulsion which is able to provide a high maximum density and a low minimum density, and having a high developing progress. The emulsion contains at least one of the sensitizing dyes represented by following general formulate I, II, III, and IV and at least one of the compounds represented by general formulae V and VI; ##STR1## The substituents are defined in the specification.Type: GrantFiled: March 18, 1985Date of Patent: January 6, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Ichizo Toya, Yuji Mihara, Haruo Takei
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Patent number: 4609621Abstract: A silver halide photographic light-sensitive material is disclosed. The material is comprised of a support base having provided thereon a hydrophilic colloid layer and a silver halide emulsion layer. The silver halide emulsion layer contains tubular silver halide grains having a diameter at least 3 times their thickness and also contains a compound represented by general formula (I) or (II): ##STR1## the substituents are defined within the specification. The material obtains the advantages of utilizing tabular silver halide grains while having a reduced dependents of its photographic properties on development processing conditions which normally effect materials containing tabular silver halide grains.Type: GrantFiled: March 20, 1985Date of Patent: September 2, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadao Sugimoto, Sumito Yamada, Tadashi Ikeda, Haruo Takei, Masaki Okazaki
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Patent number: 4607003Abstract: A photographic element comprising a support and at least one silver halide emulsion layer. The photographic element contains at least one layer containing at least one of the dyes represented by the following formula (I), (II), (III), (IV), (V), (VI), (VII) or (VIII): ##STR1## wherein Z.sub.1 to Z.sub.10 ; R.sub.1 to R.sub.24 ; L.sub.1 to L.sub.18 ; Y.sub.1 to Y.sub.8 ; Q.sub.1 to Q.sub.4 ; X.sub.1 to X.sub.3 ; Ar; h, m, p and r; and t.sub.1 to t.sub.3 are described in the specification.Type: GrantFiled: April 9, 1985Date of Patent: August 19, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshinao Ukai, Tadahisa Sato, Toshio Kawagishi, Haruo Takei
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Patent number: 4607006Abstract: A silver halide photographic light-sensitive material is described containing at least one electron-donative, silver halide-adsorptive compound represented by the following general formula (A) or (B), which is not a spectral sensitizing agent for silver halide or a nucleating agent:D--L--X (A)D--X (B)wherein D represents an electron donative atomic group comprising an aromatic ring or hetero ring, which may be unsubstituted or substituted with at least one substituent; L represents a linkage group containing at least one of C, N, S or O; and X represents a group which is adsorptive with a silver halide-adsorptive group containing at least one of C, N, S, O or Se, said N being optionally quarternized.Type: GrantFiled: October 9, 1984Date of Patent: August 19, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigeo Hirano, Yasuhisa Sano, Haruo Takei, Tsutomu Miyasaka, Shinsaku Fujita
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Patent number: 4582786Abstract: A silver halide photographic emulsion in which tabular silver halide grains having a diameter-to-thickness ratio of 5 or more account for 50% or more of the whole silver halide grains in terms of projected area, said silver halide emulsion containing at least one cyanine dye represented by the following general formula (I) and at least one compound represented by the following general formula (II) and/or at least one compound represented by the following general formula (III): ##STR1## wherein the substituents are as defined in the claims. The silver halide photographic emulsion is an extremely sensitive, spectrally sensitized emulsion.Type: GrantFiled: November 29, 1984Date of Patent: April 15, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ikeda, Haruo Takei, Hiroshi Yamashita
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Patent number: 4555481Abstract: A silver halide photographic emulsion is disclosed which contains at least one of benzimidazolocarbocyanine dyes represented by the general formula (I) or (II): ##STR1## wherein a represents an integer of 1 to 8, R.sub.1, R.sub.2 and which may be identical with or different from one another, represent each --CH.sub.2 (CF.sub.2).sub.b H or a substituted or unsubstituted alkyl group, but at least one of R.sub.1, R.sub.2 and R.sub.3 contains an acid group-containing alkyl group, wherein b, which may be identical with or different from a, represents an integer of 1 to 8, l represents 0 or an integer of 1 to 8, and m represents 0 or an integer of 1 to 8, but l+m>0; R.sub.4, R.sub.5 and R.sub.6, which may be identical or different from one another, represent each --(CH.sub.2).sub.j (CF.sub.2).sub.k F or a substituted or unsubstituted alkyl group, but at least one of R.sub.4, R.sub.5 and R.sub.6 represents an acid group (for example, sulfo group or carboxyl group, etc.Type: GrantFiled: January 25, 1984Date of Patent: November 26, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshinao Ukai, Masaki Okazaki, Haruo Takei, Ichizo Toya
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Patent number: 4555482Abstract: A silver halide photographic emulsion is disclosed. The emulsion includes a silver halide emulsion which has dispersed therein at least three types of sensitizing dyes. The emulsion includes at least one dye represented by the formula (I), at least one dye represented by the formula (II) and at least one dye represented by the formula (III). Each of the structural formulae and their substituents are defined within the specification. The resulting silver halide photographic emulsion shows a small decrease in the inherent sensitivity of the silver halide due to the sensitizing dye used.Type: GrantFiled: December 20, 1983Date of Patent: November 26, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Noriyuki Inoue, Masaki Okazaki, Kiyohiko Yamamuro, Haruo Takei
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Patent number: 4552828Abstract: A direct positive silver halide photographic emulsion which is able to provide a high maximum density and a low minimum density and having a high developing progress. The emulsion contains at least one of the sensitizing dyes represented by following general formula I and at least one of the compounds represented by general formula II:Formula I: ##STR1## Formula II: ##STR2## The substituents are defined in the specification.Type: GrantFiled: August 30, 1983Date of Patent: November 12, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Ichizo Toya, Yuji Mihara, Haruo Takei
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Patent number: 4546074Abstract: A silver halide color light sensitive material with a silver iodobromide photographic emulsion layer is described. The silver iodobromide photographic emulsion contains at least one compound represented by the general formula (I): ##STR1## and at least one compound represented by the general formula (II): ##STR2## (in the general formulae (I) and (II), all symbols are as defined in the appended claims). The surface of silver iodobromide grains of the surface low iodine content type in the photographic emulsion is adsorbed from 10.sup.-7 to 10.sup.-3 mol of iodide ion per mol of silver halide. The silver iodobromide emulsion is spectrally sensitized in a red region without causing any undesirable problems.Type: GrantFiled: October 5, 1983Date of Patent: October 8, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Sadao Kamei, Yuichi Ohashi, Toshinao Ukai, Kiyohiko Yamamuro, Haruo Takei
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Patent number: 4510235Abstract: A silver halide photographic emulsion containing a particular combination of dyes is described which prevents aggravated fogging of the emulsion under the influence of high temperature or the combination of high temperature and high humidity, and minimizes the degradation of sensitivity of the emulsion thus providing an emulsion of high stability to withstand the adverse effects of aging.Type: GrantFiled: April 26, 1984Date of Patent: April 9, 1985Assignee: Fuji Photo Film Co., Ltd.Inventors: Toshinao Ukai, Masaki Okazaki, Haruo Takei, Ichizo Toya, Sadanobu Syuto