Hetero Rings Bridged Or Fused To Carbocyclic Rings Patents (Class 430/588)
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Publication number: 20020012892Abstract: A silver halide photographic emulsion comprising a methine dye compound having in a molecule thereof at least one atomic group in which at least two groups selected from the group consisting of groups represented by formulas (I) and (II) are adjacent to each other or adjacent to each other through an atom:Type: ApplicationFiled: May 4, 2001Publication date: January 31, 2002Inventors: Katsumi Kobayashi, Takanori Hioki
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Publication number: 20020012891Abstract: A silver halide photographic emulsion which contains at least two sensitizing dyes represented by the following formula (I):Type: ApplicationFiled: May 1, 2001Publication date: January 31, 2002Inventors: Tetsuo Nakamura, Takanori Hioki
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Publication number: 20020001784Abstract: A silver halide emulsion is disclosed, comprising silver halide grains of which 70% or more of the total projected area is occupied by tabular grains, said tabular grain having main surfaces of {111} face and a thickness of 0.04 &mgr;m or less and being joined with an epitaxial phase comprising silver halide containing 97 mol % or more of silver iodide.Type: ApplicationFiled: March 23, 2001Publication date: January 3, 2002Inventor: Masashi Shirata
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Patent number: 6333146Abstract: Disclosed is a compound represented by the following formula (I): wherein Z1 represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; Z2 represents an atomic group necessary to form a 5- or 6-membered heterocyclic ring, Z2 may further be substituted, or may be condensed with a hetero ring or a benzene ring; R1 represents a hydrogen atom, a halogen atom, a mercapto group, an alkyl group, an alkenyl group, an aryl group, an alkylthio group, an alkenylthio group, or an arylthio group; L1 and L2 each represents a methine group; p1 represents 0 or 1; V1 represents a substituent; and n represents 0, 1 or 2, and when n represents 2, a plurality of V1 may be the same or different.Type: GrantFiled: March 10, 2000Date of Patent: December 25, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsumi Kobayashi, Takashi Katoh, Junji Nishigaki
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Patent number: 6329135Abstract: A silver halide photothermographic material is disclosed, comprising a support having thereon a light-sensitive layer and light-insensitive layer, wherein the light-sensitive layer or the light-insensitive layer comprises a heteroatom-containing macrocyclic compound, and the light-sensitive layer comprising a sensitizing dye exhibiting maximum sensitivity at a wavelength of 600 nm or more.Type: GrantFiled: June 2, 2000Date of Patent: December 11, 2001Assignee: Konica CorporationInventor: Hiroshi Kashiwagi
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Patent number: 6329133Abstract: This invention comprises a silver halide photographic material comprising at least one silver halide emulsion comprising silver halide grains having associated therewith a combination of two or more dyes wherein (b) (a) a dye having at least one substituent that has a negative charge is present, a dye having at least one substituent that has a positive charge is present, wherein at least one of the dyes is further substituted with at least one hydrogen bonding donor substituent. In a preferred embodiment, at least one of the dyes is substituted with at least two hydrogen bonding donor substituents. In another preferred embodiment a silver halide photographic material comprises at least one silver halide emulsion comprising silver halide grains having associated therewith a dye substituted with at least one guanidinium, amidinium, or imine of urea substituent.Type: GrantFiled: September 13, 1999Date of Patent: December 11, 2001Assignee: Eastman Kodak CompanyInventors: Andrei Andrievsky, Richard L. Parton, Thomas L. Penner, William J. Harrison
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Publication number: 20010036607Abstract: A silver halide photographic emulsion which comprises at least one methine compound represented by the following formula (I): 1Type: ApplicationFiled: February 2, 2001Publication date: November 1, 2001Inventors: Naoyuki Hanaki, Takanori Hioki, Kiyoshi Morimoto
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Patent number: 6306570Abstract: A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula: wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and Z is a light absorbing group including for example cyanine dyes, complex cyanine dyes, merocyanine dyes, complex merocyanine dyes, homopolar cyanine dyes, styryl dyes, oxonol dyes, hemioxonol dyes, and hemicyanine dyes, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein: 1) XY has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X• and the leaving fragment Y. In a preferred embodiment of the invention, the radical X• has an oxidation potential ≦−0.7 V.Type: GrantFiled: March 27, 2000Date of Patent: October 23, 2001Assignee: Eastman Kodak CompanyInventors: Anthony Adin, Jerome J. Looker, Samir Y. Farid, Ian R. Gould, Stephen A. Godleski, Jerome R. Lenhard, Annabel A. Muenter, Lal C. Vishwakarma, Paul A. Zielinski
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Patent number: 6280921Abstract: A color photographic silver halide material which contains at least one light-sensitive silver halide emulsion, and a cyanine dye of formula (I) wherein R1, R2, R3, R4, R5 and R6, independently of each other, each represent a substituent, with the proviso that at least one of the radicals R1, R2 and R3 represents a benzthienyl substituent, X represents O, S, Se, NR7, CH═CH or C(CH3)2, wherein R7 represents an alkyl radical which is optionally substituted, S1 and S2 independently of each other, represent alkyl, sulphoalkyl, carboxyalkyl, —(CH2)1—SO2—Y—SO2-alkyl, —(CH2)1—SO2—Y—CO-alkyl, —(CH2)1—CO—Y—SO2-alkyl, —(CH2)1—CO—Y—O-alkyl, —(CH2)1—NH—SO3⊖, —(CH2)1—N(alkyl)—SO3⊖ or —(CH2)1—N(Aryl)—SO3⊖ , with the proviso that l=1 to 6 and Y is NH or N—, n is 0, 1, 2 or 3, L1, L2 and L3 independently represent aType: GrantFiled: February 11, 2000Date of Patent: August 28, 2001Assignee: AGFA-GevaertInventors: Missfeldt Michael, Herrmann Stefan
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Patent number: 6261753Abstract: The present invention relates to the use of dye-stuffs of the general formula I in which R1, R2 and R3 and M• are as defined in claim 1, as infra-red-absorbing agents in hydrophilic colloidal layers, for example in recording materials or for detection purposes, recording materials, for example photographic recording materials, which comprise such dyestuffs in hydrophilic colloidal layers, and new dyestuffs of the general formula I.Type: GrantFiled: March 12, 1998Date of Patent: July 17, 2001Assignee: Riedel-De Haen AktiengesellschaftInventors: Ralph Lonsky, Lutz Uwe Lehmann
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Patent number: 6187525Abstract: A photographic recording element is disclosed containing in at least one dye image forming layer unit (a) a radiation-sensitive silver halide grains include tabular grains (1) having {111} major faces, (2) containing greater than 50 mole percent bromide, based on silver, and (3) accounting for greater than 50 percent total grain projected area, (b) a fragmentable electron donating sensitizer, (c) a water dispersible cationic starch peptizer, and (d) a one equivalent dye image providing coupler. Increased photographic speed is realized.Type: GrantFiled: December 17, 1998Date of Patent: February 13, 2001Assignee: Eastman Kodak CompanyInventors: Joe E. Maskasky, Kenneth J. Reed, Victor P. Scaccia, James A. Friday
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Patent number: 6150083Abstract: It was found that good sensitizing activity in the red spectral region and without residual stain can be obtained with dyes of the general formula (I) ##STR1## wherein R.sub.1 is an alkyl group having 1 to 6 carbon atoms or a heterocyclic ring, R.sub.2 and R.sub.3 are hydrogen, methyl, or methoxy, but at least one of the groups R.sub.2 and R.sub.3 is not hydrogen, R.sub.4 and R.sub.5 are alkyl groups having 1 to 6 carbon atoms that can be substituted with hydroxyl groups, and X.sup.- is an anion.The invention can be used for preparing silver images, for example, for reproduction in preprint operations for black and white or multicolor printing.Type: GrantFiled: November 5, 1997Date of Patent: November 21, 2000Assignee: Agfa-Gevaert, N.V.Inventors: Francois Varescon, Reinhold Ruger
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Patent number: 6139999Abstract: An electrophotographic imaging member includingat least one photographic imaging layer anda partially electrically conductive overcoat layer includingfinely divided charge injection enabling particles dispersed ina charge transporting continuous matrix including a cross linked polyamide, charge transport molecules and oxidized charge transport molecules, the continuous matrix being formed from a solution selected from the group includinga first solution includingcrosslinkable alcohol soluble polyamide containing methoxy methyl groups attached to amide nitrogen atoms,an acid having a pK.sub.Type: GrantFiled: October 28, 1999Date of Patent: October 31, 2000Assignee: Xerox CorporationInventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Paul J. DeFeo, Anthony T. Ward, Dale S. Renfer, Harold F. Hammond, Merlin E. Scharfe, Markus R. Silvestri, William W. Limburg
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Patent number: 6132912Abstract: A photoconductive imaging member comprised of a supporting substrate, a layer (1) thereover, a photogenerating layer and a charge transport layer, and wherein said layer (1) is generated from a mixture of a polyhydroxyalkylacrylate, and an amino alkyltrialkoxysilane.Type: GrantFiled: May 27, 1999Date of Patent: October 17, 2000Assignee: Xerox CorporationInventors: Timothy J. Fuller, Damodar M. Pai, John F. Yanus, Markus R. Silvestri, Huoy-Jen Yuh, John S. Chambers, Harold F. Hammond, Susan M. Vandusen, Dennis J. Prosser, Kathleen M. Carmichael, Robert C. U. Yu, Neil S. Patterson
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Patent number: 6124085Abstract: A silver halide photographic light-sensitive material is disclosed, comprising at least one compound represented by the following formula (I): ##STR1## wherein A represents a divalent linking group containing at least one atom other than a carbon atom, Z.sub.1 represents an atomic group necessary for forming a 5- or 6-membered nitrogen-containing heterocyclic ring, provided that the ring may further be condensed with an aromatic ring, L.sub.1 and L.sub.2 each represents a methine group, p.sub.1 represents 0 or 1, M.sub.1 represents a charge balancing counter ion, m.sub.1 represents a number of from 0 to 10 necessary for neutralizing the charge of the molecule, and Q represents a group necessary for forming a methine dye.Type: GrantFiled: January 14, 1999Date of Patent: September 26, 2000Assignee: Fuji Photo Film Co., Ltd.Inventor: Takanori Hioki
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Patent number: 6103436Abstract: An electrophotographic imaging member including a supporting substrate coated with at least photoconductive layer, a charge transport layer and an overcoating layer, the overcoating layer includinga hydroxy functionalized aromatic diamine anda hydroxy functionalized triarylamine dissolved or molecularly dispersed ina crosslinked polyamide matrix, the crosslinked polyamide prior to crosslinking being selected from the group consisting of materials represented by the following Formulae I and II: ##STR1## wherein: n is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100,000,R is an alkylene unit containing from 1 to 10 carbon atoms,between 1 and 99 percent of the R.sub.2 sites are --H, andthe remainder of the R.sub.2 sites are --CH.sub.2 --O--CH.sub.3, and ##STR2## wherein: m is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100000,R.sub.Type: GrantFiled: October 29, 1998Date of Patent: August 15, 2000Assignee: Xerox CorporationInventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Paul J. DeFeo, Anthony T. Ward, Dale S. Renfer, William W. Limburg, Markus R. Silvestri, Harold F. Hammond, Robert W. Nolley
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Patent number: 6099996Abstract: A flexible electrophotographic imaging member comprising a substrate and at least one imaging layer comprising a first charge transport material, free of long chain alkyl ester groups or long chain alkyl carboxyl groups, and a small amount of a different second charge transporting material containing only one long chain alkyl ester group dissolved or molecularly dispersed in a film forming binder, the at least one imaging layer having been formed by drying a coating comprising a solution of the first transporting material and second charge transporting material and the film forming polymer binder in a mixture of a low volatility solvent and a high volatility solvent. A method for fabricating this imaging member is also disclosed.Type: GrantFiled: July 29, 1999Date of Patent: August 8, 2000Assignee: Xerox CorporationInventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Dale S. Renfer, William W. Limburg
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Patent number: 6093527Abstract: A noble benzimidazolocarbocyanine dye represented by the following formulas is disclosed. A silver halide emulsion and a silver halide photographic material containing the dye are also disclosed.Type: GrantFiled: September 16, 1998Date of Patent: July 25, 2000Assignee: Konica CorporationInventors: Nobuaki Kagawa, Socman Ho, Noriyasu Kita
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Patent number: 6080518Abstract: A photoconductor for use in electrophotographic reproduction devices is disclosed. The photoconductor provides simultaneous improvement in both photoreceptor sensitivity and fatigue, while also providing higher charge voltage, lower residual voltage and lower dark decay. The photoconductor of the present invention includes simple quinone additives in either the charge generation layer, the charge transport layer, or both layers. Quinone additives are preferably selected from o-quinone, duroquinone, diphenoquinone, naphthaquinone, and mixtures of those materials, with duroquinone and the mixture E+Z 3, 3'-di-t-butyl-5, 5'-dimethyl diphenoquinones being preferred.Type: GrantFiled: June 8, 1999Date of Patent: June 27, 2000Assignee: Lexmark International, Inc.Inventors: Ronald Harold Levin, Scott Thomas Mosier
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Patent number: 6074791Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a metal oxide prepared by a sol-gel process.Type: GrantFiled: February 26, 1999Date of Patent: June 13, 2000Assignee: Xerox CorporationInventors: Carol A. Jennings, Dasarao K. Murti, Paul F. Smith, Gwynne E. McAneney, Ah-Mee Hor, Sandra J. Gardner, Beng S. Ong
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Patent number: 6071660Abstract: A photoconductor for use in electrophotographic reproduction devices is disclosed. This photoconductor exhibits dramatically reduced end seal and paper area wear, as well as reduced positive electrical fatigue. The photoconductor of the present invention includes a low surface energy polyolefin wax, such as polyethylene or polypropylene, in relatively large particulate form having a mean particle diameter of from about 6 to about 12.mu., homogeneously dispersed in its charge transport layer.Type: GrantFiled: March 12, 1999Date of Patent: June 6, 2000Assignee: Lexmark International, Inc.Inventors: David Glenn Black, Gregory Walter Haggquist, Dat Quoc Nguyen
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Patent number: 6068960Abstract: A photoreceptor fabrication method including: (a) depositing a charge generating layer; (b) depositing a first charge transport layer having a first charge carrier mobility value; and (c) depositing a second charge transport layer having a second charge carrier mobility value that is different from the first charge carrier mobility value; wherein steps (a), (b), and (c) occur in any order, wherein the difference in the first charge carrier mobility value and the second charge carrier mobility value is accomplished by:(i) wherein the first charge transport layer includes a first binder and a first charge transport material and the second charge transport layer includes a second binder and a second charge transport material, selecting the first binder to have a lesser solubility limit for the first charge transport material than the solubility limit of the second binder for the second charge transport material; or(ii) wherein the first transport layer includes a first polymeric compound composed of a first charType: GrantFiled: September 14, 1998Date of Patent: May 30, 2000Assignee: Xerox CorporationInventors: Damodar M. Pai, Chu-Heng Liu, John F. Yanus, Timothy J. Fuller, Markus R. Silvestri
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Patent number: 6063533Abstract: An electrophotographic imaging member includinga supporting substrate,an undercoat layer,a charge generating layer comprisingphotoconductive pigment particles,film forming binder anda charge transport layer formed from a coating solution, the coating solution comprising charge transporting molecules, the charge transporting molecules comprising a major amount of a first charge transport molecule comprising an alkyl derivative of an arylamine and a minor amount of second transport molecule comprising an alkyloxy derivative of an arylamine.the charge generating layer being located between the substrate and the charge transport layer. A process for fabricating this imaging member is also disclosed.Type: GrantFiled: September 20, 1999Date of Patent: May 16, 2000Assignee: Xerox CorporationInventors: John F. Yanus, Damodar M. Pai, Timothy J. Fuller, Dennis J. Prosser, Susan M. Vandusen
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Patent number: 6063557Abstract: A color photographic silver halide material in which at least one of the blue-sensitive silver halide emulsions is doped with mercury and is spectrally sensitised with a sensitising dye of formula (I) ##STR1## wherein X.sub.1 and X.sub.2, independently of each other, denote O, S, Se, NR,R denotes alkyl or carboxyalkyl,R.sub.1 and R.sub.2 or R.sub.2 and R.sub.3 denote the remaining members for the completion of a phenanthro- or anthraazole ring, and the remaining R.sub.1 or R.sub.3 radical denotes a hydrogen atom,R.sub.4 and R.sub.5, independently of each other, denote a hydrogen atom, alkyl or aryl, orR.sub.4 and R.sub.5 jointly denote the remaining members of an unsubstituted or substituted benzazole, naphthazole, phenanthro- or anthraazole,S.sub.1 and S.sub.2, independently of each other, denote alkyl, sulphoallyl or carboxyalkyl, andM.sup.+ denotes a cation which is possibly necessary for charge equalisation,is distinguished by an improved latent image stability.Type: GrantFiled: September 2, 1998Date of Patent: May 16, 2000Assignee: Agfa-Gevaert N.V.Inventors: Cuong Ly, Maria Nietgen, Michael Missfeldt, Heinz-Horst Teitscheid, Edgar Draber, Markus Geiger
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Patent number: 6051351Abstract: Photoconductive imaging members comprised of a mixture of dimeric perylenes as a charge generator, wherein said mixture comprises at least perylenes encompassed by the following formulas, or mixtures thereof ##STR1## wherein R is hydrogen, alkyl, cycloalkyl, oxaalkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl; and X is a symmetrical bridging moiety, and X--Y represents an unsymmetrical bridging moiety.Type: GrantFiled: May 21, 1999Date of Patent: April 18, 2000Assignee: Xerox CorporationInventors: Cheng-Kuo Hsiao, Ah-Mee Hor, James M. Duff, Giuseppa Baranyi, C. Geoffrey Allen
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Patent number: 6042980Abstract: Charge generation layers for photoconductors comprise a binder and a charge generation compound, wherein the binder comprises a blend of polyvinylbutyral polymer and at least one resin which improves at least one electrical characteristic of a photoconductor in which the charge generation layer is included. Photoconductors comprise the charge generation layer in combination with a substrate and a charge transport layer.Type: GrantFiled: July 21, 1998Date of Patent: March 28, 2000Assignee: Lexmark Internatonal, Inc.Inventors: Laura Lee Kierstein, Kasturi Rangan Srinivasan
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Patent number: 6030735Abstract: A photoconductive imaging member comprised of a supporting substrate, a hole blocking layer thereover, a photogenerating layer and a charge transport layer, and wherein the hole blocking layer is comprised of a polymetallosiloxane.Type: GrantFiled: October 12, 1999Date of Patent: February 29, 2000Assignee: Xerox CorporationInventor: Brian E. Springett
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Patent number: 6030734Abstract: An electrophotographic photoreceptor having a photosensitive layer containing a charge-generating material and a charge-transporting material on an electroconductive substrate, wherein the charge-transporting material has a butadiene structure and a total amount W of .pi. electron number and lone electron number of nitrogen of the charge-transporting material is at least 60.Type: GrantFiled: July 15, 1998Date of Patent: February 29, 2000Assignee: Mitsubishi Chemical CorporationInventor: Teruyuki Mitsumori
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Patent number: 6025102Abstract: A flexible electrophotographic imaging member including a supporting substrate coated with at least one imaging layer comprising charge transport material free of long chain alkyl carboxylate groups and a small amount of a different second hole transporting material containing at least two long chain alkyl carboxylate groups dissolved or molecularly dispersed in a film forming binder and coated from a mixture of solvents containing low boiling component and a small concentration of high boiling solvent.Type: GrantFiled: August 19, 1997Date of Patent: February 15, 2000Assignee: Xerox CorporationInventors: Damodar M. Pai, John F. Yanus, Timothy J. Fuller, Merlin E. Scharfe, Paul J. DeFeo, Markus R. Silvestri
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Patent number: 6010842Abstract: A silver halide photographic light-sensitive material has at least one light-sensitive silver halide emulsion layer on a support, wherein a light-sensitive silver halide emulsion in the emulsion layer contains a compound represented by formula (I) below and a compound represented by formula (II) below. ##STR1## In formula (I), each of R.sub.1 to R.sub.3 represents a hydrogen atom, an alkyl group, or an aryl group. ##STR2## In formula (II), R represents a specific alkyl group, each of L.sub.1 and L.sub.2 represents a methine group, p.sub.1 represents 0 or 1, Z.sub.1 represents atoms required to form a 5- or 6-membered nitrogen-containing heterocyclic ring, M.sub.1 represents a charge-balancing counter ion, m.sub.1 represents a number from 0 to 10 required to neutralize electric charge of a molecule, and Q represents a methine group or a polymethine group substituted by a heterocyclic group or an aromatic group.Type: GrantFiled: August 29, 1997Date of Patent: January 4, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoichi Suga, Masato Taniguchi
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Patent number: 6010841Abstract: A photographic element comprises at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of formulaZ-(L-XY).sub.kwherein:Z is a light absorbing group;L is a linking group containing a least one C, N, S, or O atom; andk is 1 or 2; andXY represents a fragmentable electron donor moiety wherein:1) XY has a an oxidation potential between 0 and about 1.4 V;2) X is an electron donor group;3) Y is a leaving group other than hydrogen; and4) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment the radical X.sup..cndot. has an oxidation potential of .ltoreq.-0.7 V.Type: GrantFiled: October 30, 1996Date of Patent: January 4, 2000Assignee: Eastman Kodak CompanyInventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski
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Patent number: 6010810Abstract: An electrophotographic photoreceptor comprising an electrically-conductive substrate having thereon at least a photosensitive layer and a surface protective layer: wherein the surface protective layer has a network structure formed by the reaction of hydroxyl group-containing compounds with an isocyanate group-containing compound; and wherein at least one of the hydroxyl group-containing compounds is an electric charge-transporting material containing a hydroxyl group. Also disclosed are a preparation process of the electrophotographic photoreceptor and an image forming apparatus comprising the electrophotographic photoreceptor.Type: GrantFiled: October 16, 1997Date of Patent: January 4, 2000Assignee: Fuji Xerox Co., Ltd.Inventors: Tomozumi Uesaka, Kazuhiro Koseki, Fumio Ojima, Masahiro Iwasaki, Kiyokazu Mashimo
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Patent number: 6010838Abstract: A color photographic silver halide material, at least 95 mol. % of the silver halides of which consist of silver chloride, the blue-sensitive layer of which is spectrally sensitised with a dye of the formula I, ##STR1## in which R.sub.1 means 2-thienyl or 3-thienyl andZ means --O-- or --S-- andR.sub.2, R.sub.3, R.sub.4, R.sub.5 and X have the meaning stated in the description,and which contains a yellow coupler of the formula II ##STR2## in which R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, Z.sub.1, Z.sub.2 and m have the meaning stated in the description, is distinguished by elevated sensitivity, low yellow fog and low secondary absorption of the yellow dye.Type: GrantFiled: October 7, 1998Date of Patent: January 4, 2000Assignee: Agfa-Gevaert NVInventors: Ralf Weimann, Michael Missfeldt, Markus Geiger
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Patent number: 5994010Abstract: An organic photoreceptor for electrophotography including a substrate which is electrically conductive; and an organic photosensitive layer which is formed on the substrate, which includes a photoconductive material, and which has a surface having a differential hardness corresponding to a 20 .mu.m or less change in width of a scratch formed on the surface for every 10 g change in vertical load during perpendicular loading with 10 g or more pressure on the surface when a test for evaluating differential hardness is performed by moving the photoreceptor to a predetermined position at a constant speed of 30 mm/minute under a load in a direction perpendicular to the surface through a conical indenter to make the scratch on the surface, which conical indenter is one of a sapphire or diamond conical indenter having a conical tip portion including an apex having a hemisphereical shape with a diameter of 0.01 mm and a conical angle of 90.degree..Type: GrantFiled: January 14, 1998Date of Patent: November 30, 1999Assignee: Fuji Electric Co., Ltd.Inventors: Takashi Tanaka, Mitsuru Narita
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Patent number: 5994051Abstract: This invention comprises a photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula X--H, wherein X is an electron donor moiety to which a base, B.sup.-, is covalently linked and H is a leaving hydrogen atom, and wherein:1) X--H has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--H undergoes deprotonation reaction with the base B.sup.-, to give the radical X.sup..cndot. and the protonated base B-H.In a preferred embodiment of the invention, the radical X.cndot. has an oxidation potential <-0.7V.Type: GrantFiled: July 17, 1998Date of Patent: November 30, 1999Assignee: Eastman Kodak CompanyInventors: Ian R. Gould, Samir Farid, Stephen A. Godleski, Jerome R. Lenhard, Annabel A. Muenter, Paul A. Zielinski
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Patent number: 5958667Abstract: A photothermographic recording material comprising a support and a photo-addressable thermally developable element containing a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith, photosensitive silver halide spectrally sensitized to wavelengths >700 nm with a dye and in catalytic association with the substantially light-insensitive organic silver salt and a water-soluble binder, a water-dispersible binder or a mixture of a water-soluble and a water-dispersible binder, characterized in that the photothermographic recording material has an infra-red sensitivity of less than 80 J/m.sup.2 and the dye satisfies the following test: an exposure required by a photothermographic recording material A, consisting of a polyester 100 .mu.Type: GrantFiled: July 8, 1997Date of Patent: September 28, 1999Assignee: Agfa-GevaertInventors: Geert Deroover, Paul Callant, Herman Uytterhoeven
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Patent number: 5885764Abstract: A silver halide photographic light-sensitive material is disclosed containing at least one methine compound represented by formula (I) or (III). Further disclosed is the methine compound represented by formula (I).Type: GrantFiled: September 30, 1997Date of Patent: March 23, 1999Assignee: Fuji Photo Film Co., Ltd.Inventors: Katsumi Kobayashi, Takanori Hioki, Takeshi Suzumoto
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Patent number: 5876915Abstract: A photothermographic recording material comprising a support and a photo-addressable thermally developable element comprising a substantially light-insensitive organic silver salt, a reducing agent therefor in thermal working relationship therewith, photosensitive silver halide spectrally sensitized with a dye and in catalytic association with the substantially light-insensitive organic silver salt and a binder, characterized in that the dye is represented by formula (I): ##STR1## with an anion if necessary for charge compensation, wherein Z.sup.1 and Z.sup.2 independently represent S, O or Se; R.sup.1 and R.sup.13 independently represent an alkylene group; X.sup.1 and X.sup.2 independently represent a --(C.dbd.O)--R.sup.18, a --(SO.sub.2)R.sup.19 or a (S.dbd.O)--R.sup.20 group where R.sup.18, R.sup.19, and R.sup.20 independently represent an alkoxy-, aryloxy-, amino- or substituted amino-group.Type: GrantFiled: July 8, 1997Date of Patent: March 2, 1999Assignee: Agfa-GevaertInventors: Geert Deroover, Ivan Hoogmartens, Hans Strijckers
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Patent number: 5866315Abstract: A silver halide photographic light sensitive material is disclosed, comprising a support having thereon a silver halide emulsion layer comprising a silver halide emulsion, wherein the silver halide emulsion comprises silver halide grains having an average iodide content of 0 to 1 mol %, at least 50% of total grain projected area is accounted for by tabular grains having an aspect ratio of 2 to 20; and the silver halide grains being spectrally sensitized with a sensitizing dye represented by the following formula (1) or (2): ##STR1##Type: GrantFiled: May 20, 1997Date of Patent: February 2, 1999Assignee: Konica CorporationInventors: Socman Ho, Nobuaki Kagawa, Noriyasu Kita
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Patent number: 5851753Abstract: A silver halide photographic laight-sensitive material is disclosed. The light-sensitive material comprises a support and a silver halide emulsion layer and a non-light-sensitive hydrophilic colloid layer provided on the support, wherein at least one of the silver halide emulsion layer and the non-light-sensitive hydrophilic colloid layer contains a compound represented by the following Formula 1, and the silver halide emulsion layer contains tabular silver halide grains having an average aspect ratio of not less than 2.0 account for at least 50 % of total grain projected area of the emulsion, and the tabular grains have an average silver iodide content is not more than 1 mole-%;Formula 1R.sub.11 --(S).sub.n --R.sub.12wherein R.sub.11 and R.sub.12 are each independently represent an aliphatic group, an aromatic group or a heterocyclic group, the groups represented by R.sub.11 and R.sub.12 may be the same or different and they may be bonded with together to form a ring; and n is an integer of from 2 to 6.Type: GrantFiled: October 8, 1996Date of Patent: December 22, 1998Assignee: Konica CorporationInventors: Taketoshi Yamada, Norio Miura, Naoyo Suzuki, Hiroshi Kashiwagi, Hideki Takiguchi
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Patent number: 5763152Abstract: A silver halide photographic light-sensitive material is disclosed. The material comprises a substrate provided thereon with at least one silver halide emulsion layer comprising at least one compound represented by the following Formula (I): ##STR1## wherein Ra and Rb each represents a hydrogen atom, an alkyl group having at least two carbon atoms or an aryl or heterocyclic group, provided that Ra and Rb do not simultaneously represent hydrogen atoms; La and Lb each represents a methylene group; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; Z.sub.1 represents an atomic group required for forming a 5- or 6-membered nitrogen atom-containing heterocyclic ring; M.sub.1 represents a counterion required for balancing the electrical charge; m.sub.1 represents a numerical value of not less than 0 required for neutralizing the molecule; and Q represents a methine or polymethine group required for forming a methine dye.Type: GrantFiled: March 29, 1996Date of Patent: June 9, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Takanori Hioki, Mikio Ihama
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Patent number: 5756276Abstract: A high sensitivity silver halide emulsion excellent in keeping quality and rapid processing in which tabular silver halide grains having {100} faces as two main planes parallel to each other, an aspect ratio of 2 or more and a mean silver chloride content of 50 mol % or more occupy 50% or more of the total projected area of the silver halide grains, said silver halide emulsion being spectrally sensitized with a trimethineoxathiacyanine dye, etc., and a photographic material using the emulsion.Type: GrantFiled: February 1, 1995Date of Patent: May 26, 1998Assignee: Fuji Photo Film Co., Ltd.Inventor: Hideyuki Shirai
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Patent number: 5747233Abstract: The present invention relates to the use of dyestuffs of the general formula I ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 and M.sup..sym. are as defined in claim 1, as infrared-absorbing agents in hydrophilic colloidal layers, for example in recording materials or for detection purposes, recording materials, for example photographic recording materials, which comprise such dyestuffs in hydrophilic colloidal layers, and new dyestuffs of the general formula I.Type: GrantFiled: May 15, 1997Date of Patent: May 5, 1998Assignee: Riedel-De Haen AktiengesellschaftInventors: Ralph Lonsky, Lutz Uwe Lehmann
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Patent number: 5747236Abstract: A photographic element comprises a support and at least one silver halide emulsion layer in which the silver halide is sensitized with a fragmentable electron donor of the formula X--Y, wherein X is an electron donor moiety and Y is a leaving group other than hydrogen, and wherein:1) X--Y has an oxidation potential between 0 and about 1.4 V; and2) the oxidized form of X--Y undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.Type: GrantFiled: October 30, 1996Date of Patent: May 5, 1998Assignee: Eastman Kodak CompanyInventors: Samir Y. Farid, Jerome R. Lenhard, Chin H. Chen, Annabel A. Muenter, Ian R. Gould, Stephen A. Godleski, Paul A. Zielinski, Charles H. Weidner
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Patent number: 5738982Abstract: A novel silver halide photographic material is provided, comprising a hydrophilic colloidal layer containing at least one dye represented by the following formula (i): ##STR1## wherein Y.sup.1 and Y.sup.2 each represents a chalcogen atom, --CH.dbd.CH--, --N(R.sup.10)--, or --C(R.sup.10)(R.sup.11)--, in which R.sup.10 and R.sup.11 each represents an alkyl group; Z.sup.1 and Z.sup.2 each represents a nonmetallic atom group necessary for forming a benzo condensed or naphtho condensed ring; R.sup.1 and R.sup.2 each represents an alkyl group; the plurality of L groups may be the same or different and each represents a methine group, with the proviso that at least one of the plurality of L groups represents a methine group substituted by --OR.sup.12, --N(R.sup.12)(R.sup.13), --SR.sup.12 or --CH(R.sup.14)(R.sup.15), in which R.sup.12 represents an alkyl or aryl group substituted by an acidic substituent, R.sup.13 represents a hydrogen atom or an alkyl or aryl group substituted by an acidic substituent, and R.sup.Type: GrantFiled: June 6, 1995Date of Patent: April 14, 1998Assignee: Fuji Photo Film Co., Ltd.Inventors: Toru Harada, Itsuo Fujiwara
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Patent number: 5728513Abstract: A silver halide color photographic light sensitive material is disclosed, comprising a support having thereon a silver halide emulsion layer containing a sensitizing dye represented by formula (I) and a coupler represented by formula (M-I). The photographic material further contains a coupler represented by formula (C-I) or (C-II).Type: GrantFiled: February 22, 1996Date of Patent: March 17, 1998Assignee: Konica CorporationInventors: Hiroshi Okusa, Yasuhiko Kawashima
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Patent number: 5723280Abstract: A silver halide photographic element comprises a silver halide emulsion layer sensitized with a sensitizing dye of Formula I: ##STR1## wherein each of X.sub.1 and X.sub.2 is an oxygen atom, a sulfur atom, or a selenium atom, with the proviso that one of X.sub.1 and X.sub.2 is an oxygen atom and the other is a sulfur or selenium atom; V.sub.1 and V.sub.2 together or V.sub.2 and V.sub.3 together represent the atoms necessary to complete a fused benzene ring; each of V.sub.4 and V.sub.5 is independently a hydrogen or halogen atom, or an alkyl, alkoxy or aryl group; R.sub.1 is an acid substituted alkyl group; R.sub.2 is a 2-sulfoethyl group; and M is a counterion as necessary to balance the charge.Type: GrantFiled: May 29, 1996Date of Patent: March 3, 1998Assignee: Eastman Kodak CompanyInventors: Steven George Link, James Kenneth Elwood, Frederick Charles Derks, Kenneth William Lowe
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Patent number: 5712077Abstract: The present invention provides a method for making a lithographic printing plate according to the silver salt diffusion transfer process comprising the following steps:image-wise exposing with a high intensity-short time exposure with light with a wavelength between 600 nm and 700 nm an imaging element comprising on a support (1) a photosensitive layer comprising at least one photosensitive silver halide emulsion sensitized to light by means of one or more cationic carbocyanine sensitizing dye having a maximum absorption between 600 nm and 700 nm, the silver halide crystals of said silver halide emulsion comprising more than 95 mole % of silver chloride per mole of silver halide and (2) an image receiving layer comprising physical development nuclei in a water permeable relationship with said photosensitive layer,developing said imaging element using an alkaline processing liquid in the presence of (a) developing agent(s) and (a) silver halide solvent(s),characterized in that said silver halide crystals contaType: GrantFiled: January 27, 1997Date of Patent: January 27, 1998Assignee: AGFA-Gevaert, N.V.Inventors: Lode Deprez, Paul Callant
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Patent number: 5700608Abstract: A photographic element is described which comprises a silver halide emulsion having incorporated therein a latent image forming unit, said unit being comprised of an agglomeration of silver halide in conductive contact with a light absorbing center, wherein the center is comprised of:(i) an amorphous or liquid crystalline spectral sensitizing dye; or(ii) a plurality of spectral sensitizing dye crystals.Also described is a process for forming a silver halide emulsion and the emulsion prepared by such process.Type: GrantFiled: March 19, 1996Date of Patent: December 23, 1997Assignee: Eastman Kodak CompanyInventors: Lyn Marie Eshelman, David Darrell Miller, David Howard Levy
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Patent number: 5695918Abstract: A dye of the formula (I) below, and photographic elements having a light sensitive layer and which element contains such a dye: ##STR1## X.sub.1 and X.sub.2 each independently represent the atoms necessary to complete a 5- or 6-membered heterocyclic nucleus;x and y are, independently, integers from 0 to 3 provided x+y is no greater than 4;p and q each independently represents 0 or 1,each L independently represents a methine group;R.sub.1 and R.sub.2 each independently represents an alkyl group or an aryl group, andR.sub.3 represents an alkyl group, aryl group or heteroaryl group;W1 is a counterion as needed to balance the charge of the molecule.Type: GrantFiled: April 2, 1996Date of Patent: December 9, 1997Assignee: Eastman Kodak CompanyInventors: Colin James Gray, John David Mee, Derek David Chapman, Kevin Wallace Williams