Abstract: A dispersion comprising an aqueous medium having dispersed therein an aggregated dye of the Formula (I):
wherein X is oxygen or sulfur; R1-R4 each independently represent an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted heteroaryl group; L1, L2 and L3 each independently represent substituted or unsubstituted methine groups; M+ represents a proton or an inorganic or organic cation; and n is 0, 1, 2 or 3 and wherein the aggregated dye in the dispersion has an absorption half bandwidth of less than 55 nm.
Type:
Grant
Filed:
December 7, 2000
Date of Patent:
October 23, 2001
Assignee:
Eastman Kodak Company
Inventors:
Margaret Jones Helber, William James Harrison, Elizabeth Ann Gallo, Mary Christine Brick, Steven Wade Kortum, Gary Norman Barber
Abstract: A method for preparing ultra-pure silver from a crude silver halide matrix containing metallic and/or non-metallic impurities, said method comprising;
roasting the crude silver halide matrix to substantially remove carbonaceous material;
treating the roasted crude silver halide matrix with ammonium hydroxide to dissolve the silver halides and form an ammonium hydroxide reaction mixture;
adding an initial reducing agent to the ammonium hydroxide reaction mixture to precipitate a crude silver powder mixture;
separating the crude silver powder mixture from the ammonium hydroxide reaction mixture
dissolving the crude silver powder mixture in nitric acid to form a crude silver nitrate solution;
adding a first selective reducing agent to the crude silver nitrate solution to precipitate a silver/contaminant matrix and form a partially purified silver nitrate solution;
separating the partially purified silver nitrate solution from the precipitated silver/contaminant matrix;
adding a second selective reducing
Type:
Grant
Filed:
December 8, 1999
Date of Patent:
September 18, 2001
Assignee:
Eastman Kodak Company
Inventors:
Weimar W. White, Gary G. Kiehl, Brian P. Cleary
Abstract: A method for preparing ultra-pure silver from a crude silver mixture containing metallic and/or non-metallic impurities, said method comprising;
dissolving the crude silver mixture in nitric acid to form a crude silver nitrate solution;
adding a first selective reducing agent to the crude silver nitrate solution to precipitate a silver/contaminant matrix and form a partially purified silver nitrate solution;
separating the partially purified silver nitrate solution from the precipitated silver/contaminant matrix;
adding a second selective reducing agent to the partially purified silver nitrate solution to precipitate silver powder; and
isolating the silver powder.
Type:
Grant
Filed:
December 8, 1999
Date of Patent:
September 18, 2001
Assignee:
Eastman Kodak Company
Inventors:
Weimar W. White, Gary G. Kiehl, Brian P. Cleary
Abstract: This invention relates to a silver halide photographic element comprising a reflective support having situated thereon a non-tabular silver halide emulsion layer, said emulsion layer being predominantly silver chloride and being in reactive association with a thiolic compound represented by Formula I:
wherein Ar represents a substituted or unsubstituted aromatic or heteroaromatic ring; and EW represents an electron withdrawing group; and with a mercapto azole compound represented by Formula II:
wherein Q represents the atoms necessary to form a substituted or unsubstituted five or six-membered heterocyclic ring containing at least one nitrogen atom, and M is a cation.
Abstract: A photographic element comprises at least one light-sensitive layer on a support wherein the photographic element also comprises a particulate ion exchange material having an average particle size of about 0.01 to about 10 &mgr;m and comprising at least one reducing agent ionically bound to an ion exchange matrix.
Type:
Grant
Filed:
June 13, 2000
Date of Patent:
July 17, 2001
Assignee:
Eastman Kodak Company
Inventors:
Lyn M. Irving, John M. Noonan, Mark E. Irving
Abstract: This invention relates to a silver halide photographic element comprising a silver halide emulsion which is greater than 50 mole % silver chloride and
(a) which has been chemically sensitized in the presence of a dithiolone compound represented by Formula (A):
wherein b is C(O), C(S), C(Se), CH2 or (CH2)2, and R1 and R2 are substituents or wherein R1 and R2 may together represent the atoms necessary to form a substituted or unsubstituted five or six-membered ring or a multiple ring system; and q is 1 or 2; and a fist mercapto azole compound independently represented by Formula B:
wherein Q represents the atoms necessary to form a substituted or unsubstituted five or six -membered heterocyclic ring containing at least one nitrogen atom, and M is a cation; and
(b) to which a second mercapto azole compound independently represented by Formula (B) was added after the completion of chemical sensitization.
Abstract: This invention relates to a photographic element comprising a support, a radiation sensitive silver halide emulsion layer and a water dispersible polymeric disulfonamidophenol that is substantially immobile in the element. The invention provides color photographic elements that exhibit improved stability, color reproduction and robustness in terms of processing variations; particularly variations in red density due to sensitizing dye.
Type:
Grant
Filed:
March 13, 2000
Date of Patent:
July 3, 2001
Assignee:
Eastman Kodak Company
Inventors:
Tienteh Chen, Stephen P. Singer, Ronald E. Leone
Abstract: A photographic element comprising a support bearing one or more silver halide emulsions at least one of which comprises at least 50% silver chloride in association with one or more image dye-forming couplers and one or more DI(A)R couplers of formulae I or II:
wherein:
TIME is a timing group and
R1, R2, Z, n, and j are as defined in the specification,
wherein the DI(A)R coupler(s) in association with an emulsion comprising at least 50% silver chloride comprise at least about 25% to about 90% of the total amount of coupler in association with that emulsion and the total amount of coupler is the sum of the number of moles of image coupler(s) and the number of moles of the DI(A)R couplers in association with that emulsion.
Type:
Grant
Filed:
December 20, 1999
Date of Patent:
May 29, 2001
Assignee:
Eastman Kodak Company
Inventors:
Philip A. Allway, Christina M. Watts, Paul L. Stanley
Abstract: This invention relates to a method of reducing fog in a silver halide emulsion comprising taking a high fogging emulsion which has been chemically sensitized and cooled, holding the high fogging emulsion in the form of a melt in preparation for coating on a support, and prior to or during said holding, contacting the emulsion with an isothiazolin-one compound represented by the following formula
wherein R1 is a substituent; and Z contains the carbon atoms necessary to form a substituted or unsubstituted non-aromatic ring. It also relates to silver halide photographic elements containing such emulsions.
Abstract: The invention relates to the preparation of photographic dispersions.
The method of the invention consists in preparing a fluid dispersion of an additive in a colloid, congealing the resulting dispersion, subdividing the resulting congealed dispersion into particles, washing the resulting particles, and adding to them a solution of biocide.
A dispersion is thus obtained that is protected against the proliferation of micro-organisms during storage.
Type:
Grant
Filed:
November 18, 1999
Date of Patent:
February 13, 2001
Assignee:
Eastman Kodak Company
Inventors:
Christian Paris, Laurent G. Fernandez-Puente
Abstract: This invention relates to a photographic element comprising a support and at least two silver halide emulsion layers wherein at least one emulsion layer contains an electron transfer agent releasing compound represented by the formula:CAR--(L).sub.n --ETAwherein:CAR is a carrier moiety which is capable of releasing --(L)n--ETA on reaction with oxidized developing agent;L is a divalent linking group, n is 0, 1 or 2; andETA is a releasable 1-aryl-3-pyrazolidinone electron transfer agent having a calculated log partition coefficient (c log P) greater than or equal to 2.40 bonded to L or CAR through either the nitrogen atom in the 2-position or the oxygen attached to the 3-position of the pyrazolidinone ring; and at least one soluble mercaptan releasing compound.
Type:
Grant
Filed:
December 30, 1998
Date of Patent:
September 5, 2000
Assignee:
Eastman Kodak Company
Inventors:
James A. Friday, Sharon R. Lunt, Scott C. Sutton
Abstract: This invention relates to a photographic element comprising a support and at least two silver halide emulsion layers wherein at least one emulsion layer contains an electron transfer agent releasing compound represented by the formula:CAR--(L).sub.n --ETAwherein:CAR is a carrier moiety which is capable of releasing --(L)n--ETA on reaction with oxidized developing agent;L is a divalent linking group, n is 0, 1 or 2; andETA is a releasable 1-aryl-3-pyrazolidinone electron transfer agent having a calculated log partition coefficient (c log P) greater than or equal to 2.40 bonded to L or CAR through either the nitrogen atom in the 2-position or the oxygen attached to the 3-position of the pyrazolidinone ring.
Type:
Grant
Filed:
December 30, 1998
Date of Patent:
August 29, 2000
Assignee:
Eastman Kodak Company
Inventors:
Sharon R. Lunt, Scott C. Sutton, Louis E. Friedrich, David T. Southby
Abstract: This invention relates to a photographic element comprising a silver halide emulsion layer having associated therewith a yellow dye-forming coupler which is an acylacetanilide compound comprising an alkoxy or aryloxy substituent ortho to the nitrogen atom on the acetanilide ring said ring further comprising a substituent containing a chroman ether group.
Abstract: A color negative photographic element is disclosed containing higher levels of oxidized developer agent scavenging compound in the lowest and intermediate sensitivity layers of a triple-coated image recording unit than in the fast layer. Reduced fog and granularity are obtained, and increased speed and latitude are obtained.
Type:
Grant
Filed:
March 31, 1999
Date of Patent:
March 28, 2000
Assignee:
Eastman Kodak Company
Inventors:
Allan F. Sowinski, William J. Begley, Stephen P. Singer
Abstract: A photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the element containing an image modifying compound which comprises a magenta coupler moiety which upon reaction with oxidized color developing agent during processing forms a dye, said coupler moiety having attached to the coupling site, either directly or through a timing group, a 1,2,3-triazole moiety, the attachment being through the second nitrogen atom of the triazole moiety.
Type:
Grant
Filed:
March 6, 1998
Date of Patent:
March 28, 2000
Assignee:
Eastman Kodak Company
Inventors:
William James Begley, Frank D. Coms, Daniel L. Kapp
Abstract: A method of preparing a bleaching solution for a photographic element comprising combining a photographic bleach starter comprising sodium acetate, potassium acetate or ammonium acetate with a photographic solution having bleaching ability.
Abstract: This invention relates to an organomercapto Au(I) complex having the formula ##STR1## wherein M is a cationic counterion;SOL is a solubilizing group;A is a substituted or unsubstituted divalent organic linking group;and n is 1 to 4 and wherein the compound is symmetrical.It further relates to a method of manufacturing an organomercapto Au(I) complex comprising reacting an Au(I) complex with an organomercapto ligand and isolating the resulting organomercapto Au(I) complex from the reaction mixture.
Type:
Grant
Filed:
November 6, 1997
Date of Patent:
March 7, 2000
Assignee:
Eastman Kodak Company
Inventors:
Roger Lok, Weimar W. White, Brian P. Cleary
Abstract: This invention relates to a photographic element comprising a support having situated thereon at least one silver halide emulsion layer, the element further containing an image modifying coupler which upon reaction with oxidized color developing agent during processing forms a dye, said image modifying coupler represented by the formula ##STR1## wherein COUP is a photographic coupler moiety;T.sup.1 is a timing or linking group;R.sup.1 and R.sup.2 are independently selected from a halide atom, or an aliphatic, carbocyclic, heterocyclic, carbamoyl, sulfamoyl, carbonamido, sulfonamido, acyl, sulfo, nitro, cyano, amino, alkoxy, alkoxyalkyl, aryloxy, aryloxyalkyl, thioalkoxy, thioalkoxyalkyl, thioaryloxy, or thioaryloxyalkyl group; andn is selected from 0, 1 or 2. More particularly this invention relates to a photographic element containing the above image modifying coupler wherein n is 0 and R.sup.1 and R.sup.2 are independently represented by the formula:**--(Z).sub.m -(X).sub.t -R.sup.
Type:
Grant
Filed:
February 6, 1998
Date of Patent:
December 28, 1999
Assignee:
Eastman Kodak Company
Inventors:
William J. Begley, Frank D. Coms, Teh-Hsuan Chen, Donald Singleton, Jr.
Abstract: This invention relates to a silver halide photographic element comprisinga support having a frontside and a backside;a light-sensitive silver halide emulsion layer superposed on the frontside of the support; anda transparent magnetic recording layer superposed on the backside of the support, said magnetic recording layer comprising magnetized particles, a dispersing agent and an aromatic polyester binder having a Tg of greater than 150.degree. C.
Type:
Grant
Filed:
September 21, 1998
Date of Patent:
December 14, 1999
Assignee:
Eastman Kodak Company
Inventors:
Paul D. Yacobucci, Robert O. James, Catherine A. Falkner, George Musshafen
Abstract: A color negative photographic element is disclosed containing higher levels of oxidized developer agent scavenging compound in the lowest and intermediate sensitivity layers of a triple-coated image recording unit than in the fast layer. Reduced fog and granularity are obtained, and increased speed and latitude are obtained.
Type:
Grant
Filed:
June 25, 1998
Date of Patent:
November 23, 1999
Assignee:
Eastman Kodak Company
Inventors:
Allan F. Sowinski, William J. Begley, Stephen P. Singer