Patents by Inventor David T. Southby

David T. Southby 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: 6242170
    Abstract: This invention provides a multicolor photographic element comprising a support bearing a cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of said emulsion layers comprises large tabular grains having an average equivalent circular diameter of greater than 3 &mgr;m and contains a one equivalent image dye-forming coupler and a fragmentable electron donating compound of the formula: X—Y′ or a compound which contains a moiety of the formula —X—Y′; wherein X is an electron donor moiety, Y′ is a leaving proton H
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: June 5, 2001
    Assignee: Eastman Kodak Company
    Inventors: Joseph P. Pepe, Jeffrey C. Hansen, James A. Friday, Annabel A. Muenter, David T. Southby
  • Patent number: 6132944
    Abstract: Disclosed is a photographic element containing a light sensitive silver halide emulsion layer having associated therewith a coupler represented by Formula I: ##STR1## wherein COUP is a coupler parent group capable of reacting with an oxidized developer to form a first dye and is bonded at a coupling position to the group ##STR2## wherein X is a or NSO.sub.2 R; R is an alkyl or aryl group; and DYE is a releasable second dye that is after release the same color as the first dye and is linked to OC.dbd.X by a moiety of the DYE having Formula (IA): ##STR3## wherein R.sup.2 is a substituent; provided there is contained in the coupler of Formula I at least one group of Formula IB:--L.sub.m --Sol IBwherein L is a divalent linking group and m is 0 or 1; and Sol is a group containing an acidic hydrogen selected from the group consisting of --ArOH, --NHSO.sub.2 R.sup.1 and --SO.sub.2 NHR.sup.1, in which AR is an aromatic group and each R.sup.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: October 17, 2000
    Assignee: Eastman Kodak Company
    Inventors: Jared B. Mooberry, Steven M. Bonser, Kevin P. Dockery, David Hoke, Chang-Kyu Kim, James J. Seifert, David T. Southby, Zheng Z. Wu
  • Patent number: 6120981
    Abstract: Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a dye-foaming coupler compound and a sulfonamido compound (a) bearing on the sulfur atom of the sulfonamido group an alkyl group and (b) bearing on the nitrogen atom of the sulfonamido group both a hydrogen atom that exhibits a pKa value of less than 9 and a second substituent that is either (1) an aryl group containing one or more electron withdrawing substituents for which the sum of the Hammett's values (.SIGMA..sigma..sub.p) is greater than 0.5, or (2) a heteroaryl group.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: September 19, 2000
    Assignee: Eastman Kodak Company
    Inventors: David Hoke, Jared B. Mooberry, Kathleen M. Yahn, Kevin P. Dockery, David T. Southby
  • Patent number: 6110657
    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
  • Patent number: 6033833
    Abstract: A new fogging photographic processing solution for a reversal process comprises a compound (I) and a bi-nucleophilic agent. Compound (I) corresponds to the following formula: ##STR1## wherein A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, R.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group substituted or unsubstituted. A process of producing a positive image by imagewise exposure of a reversal silver halide material comprises contacting the material with the above fogging solution or by imagewise exposure of such a material containing a compound (I) and contacting the material with a solution comprising a bi-nucleophilic agent.
    Type: Grant
    Filed: April 29, 1999
    Date of Patent: March 7, 2000
    Assignee: Eastman Kodak Company
    Inventors: Siu C. Tsoi, Peter J. Twist, David T. Southby
  • Patent number: 5998121
    Abstract: The photographic element of the invention provides a support bearing at least one photographic silver halide emulsion exhibiting low developability and having associated therewith at least one high dye-yield coupler that releases a dye or dye precursor having an electrically neutral dye chromophore. The invention also encompasses a process for forming an image in an element in accordance with the invention.
    Type: Grant
    Filed: October 15, 1996
    Date of Patent: December 7, 1999
    Assignee: Eastman Kodak Company
    Inventors: David T. Southby, James T. Kofron, Robert J. Newmiller
  • Patent number: 5962203
    Abstract: A new fogging photographic processing solution for a reversal process comprises a compound (I) and a bi-nucleophilic agent. Compound (I) corresponds to the following formula: ##STR1## wherein A is a group capable of being adsorbed to the silver halide surface, L is a linking group and r is 0 or 1, R.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group substituted or unsubstituted. A process of producing a positive image by imagewise exposure of a reversal silver halide material comprises contacting the material with the above fogging solution or by imagewise exposure of such a material containing a compound (I) and contacting the material with a solution comprising a bi-nucleophilic agent.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: October 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: Siu C. Tsoi, Peter J. Twist, David T. Southby
  • Patent number: 5958664
    Abstract: The present invention relates to a new coupler which is capable of releasing a development accelerator having the formula: ##STR1## wherein COUP is a coupler moiety,T is a timing group and n is 0, 1 or 2,A is a group capable of being adsorbed to the silver halide surface,L is a linking group and r is 0 or 1, andR.sub.1 and R.sub.2 are independently selected from an alkyl group, substituted or unsubstituted, and an aryl group, substituted or unsubstituted.The present invention also concerns a photographic silver halide recording material containing such a coupler and further relates to a process for processing such a material.The invention provides a new DARC compound showing improved speed increase without undue fog formation.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Siu-Chung Tsoi, Peter J. Twist, David T. Southby
  • Patent number: 5512410
    Abstract: An aqueous-developable photographic color diffusion transfer element comprising one and only one dimensionally stable support and one or more layers comprising radiation sensitive silver halide, thermal solvent for facilitating the thermal diffusion of dyes through a hydrophilic binder, a dye-releasing coupler, a dye-receiving layer intermediate said support and dye-releasing coupler containing layers, a stripping layer intermediate said dye-receiving layer and any layers containing silver halide or dye-releasing coupler, and hydrophilic binder, wherein said dye is heat diffusible in said binder and thermal solvent, wherein said dye-releasing coupler is of the structureCp--L--DyewhereCp is a coupler radical substituted in the coupling position with a divalent linking group, L;Dye is a dye radical exhibiting selective absorption in the visible spectrum; and where said --L--Dye group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent, and such that s
    Type: Grant
    Filed: October 17, 1994
    Date of Patent: April 30, 1996
    Assignee: Eastman Kodak Company
    Inventors: John Texter, Thomas R. Welter, David T. Southby, Jared B. Mooberry, David S. Bailey
  • Patent number: 5470688
    Abstract: In accordance with this invention a heat-developable photographic color diffusion transfer element is provided, where this element comprises a dimensionally stable support and one or more layers comprising radiation sensitive silver halide, an organic silver salt oxidizing agent, a reducing agent, a methine-dye releasing compound, and a binder, wherein said methine-dye is heat diffusible in said element, and wherein said methine-dye releasing compound is of the structureCp--L--M (I)whereCp is a coupler radical substituted in the coupling position with a divalent linking group, L;M is a methine-dye radical exhibiting selective absorption in the visible spectrum; and where the --L--M group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent, and where said methine-dye radical M is released from said --L--M group subsequent to the coupling off of said --L--M group.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: November 28, 1995
    Assignee: Eastman Kodak Company
    Inventors: John Texter, Thomas R. Welter, David T. Southby, Jared B. Mooberry
  • Patent number: 5457004
    Abstract: The invention provides a photographic element comprising a substrate bearing a photographic silver halide emulsion layer having associated therewith a high dye-yield coupler having the formula: ##STR1## wherein: COUP is a photographic coupler residue capable of coupling with oxidized color developer to form a first dye;T is a timing group;m is an integer from 0 to 2;L is a linking group selected from the group consisting of --OC(.dbd.O)--, --OC(.dbd.S)--, --SC(.dbd.O)--, --SC(.dbd.S)--, and --OC(.dbd.NSO.sub.2 R) where R is substituted or unsubstituted alkyl or aryl; andDYE is a releasable second dye or dye precursor having a particular formula including a methine dye chromophore.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: October 10, 1995
    Assignee: Eastman Kodak Company
    Inventors: Jared B. Mooberry, James J. Seifert, David Hoke, Zheng Z. Wu, David T. Southby, Frank D. Coms
  • Patent number: 5455141
    Abstract: Photographic elements are described which contain a release compound that during photographic processing provides an imagewise distribution of a nucleophile which can react with a uniform distribution of a blocked dye moiety contained in the element to release an unblocked dye.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: October 3, 1995
    Assignee: Eastman Kodak Company
    Inventors: Zbyslaw R. Owczarczyk, Xiqiang Yang, Daniel L. Kapp, Wojciech K. Slusarek, Louis E. Friedrich, David T. Southby
  • Patent number: 5455140
    Abstract: An aqueous-developable photographic color diffusion transfer element is disclosed where this element comprises one and only one dimensionally stable support and one or more layers comprising radiation sensitive silver halide, thermal solvent for facilitating the thermal diffusion of dyes through a hydrophilic binder, a methine-dye releasing coupler, and hydrophilic binder, wherein said dye is heat diffusible in said binder and thermal solvent, and wherein said methine-dye releasing coupler is of the structure (I)Cp--L--M (I)whereCp is a coupler radical substituted in the coupling position with a divalent linking group, L;M is a methine-dye radical exhibiting selective absorption in the visible spectrum; and where the --L--M group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent, and where said methine-dye radical M is released from said --L--M group subsequent to the coupling off of said --L--M group.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: October 3, 1995
    Assignee: Eastman Kodak Company
    Inventors: John Texter, Thomas R. Welter, David T. Southby, Jared B. Mooberry
  • Patent number: 5447819
    Abstract: The invention provides a photographic element comprising a support bearing a photographic silver halide emulsion layer having associated therewith a high dye-yield coupler having the formula:COUP--(T).sub.m --L--DYEwhere COUP is the parent group of the coupler capable of reacting at the coupling position with oxidized color developer to form a first dye, T is one or more timing groups with m=1 or 2, L is a linking group selected from the group consisting of --OC(O)--, --OC(S)--, --SC(O)--, --SC(S)--, or --OC(.dbd.N SO.sub.2 R)--, where R is substituted or unsubstituted alkyl or aryl, and DYE is a second dye or precursor thereof, wherein there is present at least one T group that contains a substituent having the formula:--(LINK).sub.p --A--B--(C--D).sub.nwherein:LINK is an alkylene group capable of linking the above group to the group T, where p=0 or 1;A is a member selected from the group consisting of --NHCO--, --N(R')C(O)N(R--)--, --CONH--, --NR'SO.sub.2 --, --SO.sub.2 NR'--, and --OPO.sub.
    Type: Grant
    Filed: May 27, 1994
    Date of Patent: September 5, 1995
    Assignee: Eastman Kodak Company
    Inventors: Jared B. Mooberry, James J. Seifert, David Hoke, Zheng Z. Wu, David T. Southby, Frank D. Coms
  • Patent number: 5372919
    Abstract: A polymeric material is provided comprising a blocked photographically useful group (PUG). The incorporated blocked photographically useful group includes a PUG and a blocking group that is capable of releasing the PUG upon processing the photographic element, wherein the blocking group(a) is capable of reacting with a dinucleophile reagent, and(b) comprises two electrophilic groups that are separated from each other by a substituted atom that enables a nucleophilic displacement reaction to occur with release of PUG upon processing the photographic element in the presence of a dinucleophile reagent, wherein the group that is less electrophilic is bonded directly or through at least one releasable timing group to the PUG.Photographic elements and emulsions including the inventive polymers, and processes for developing an image in the elements, are also provided.
    Type: Grant
    Filed: March 22, 1993
    Date of Patent: December 13, 1994
    Assignee: Eastman Kodak Company
    Inventors: Ralph B. Nielsen, David T. Southby, Katherine Root, Hwei-Ling Yau
  • Patent number: 5358828
    Abstract: A color photographic element is disclosed comprising a support bearing at least one photographic silver halide emulsion layer, an image dye-forming coupler, and a coupler (A) capable of forming a compound that is washed out of the photographic element upon processing and capable of releasing a bleach accelerator group, wherein the coupler (A) is represented by the formula:(SOL).sub.x --COUP--(R.sup.1).sub.y --(R.sup.2).sub.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: October 25, 1994
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Stephen P. Singer, David T. Southby, Donald Singleton, Jr.
  • Patent number: 5356750
    Abstract: An aqueous-developable photographic color diffusion transfer element comprising a single dimensionally stable support and one or more layers comprising radiation sensitive silver halide, thermal solvent for facilitating the thermal diffusion of dyes through a hydrophilic binder, a dye-releasing coupler, and hydrophilic binder, wherein said dye is heat diffusible in said binder and thermal solvent, and wherein said dye-releasing coupler is of the structureCp--L-DyewhereCp is a cyan dye forming radical, magenta dye forming radical, yellow dye forming radical, black dye forming radical, or colorless product forming radical, said Cp being substituted in the coupling position with a divalent linking group, L;Dye is a dye radical exhibiting selective absorption in the visible spectrum; and where said --L-Dye group couples off upon reaction of said coupler radical with the oxidation product of a primary amine developing agent is disclosed.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: October 18, 1994
    Assignee: Eastman Kodak Company
    Inventors: John Texter, Thomas R. Welter, David T. Southby, Jared B. Mooberry
  • Patent number: 5354650
    Abstract: Photographic elements are described which contain a release compound that during photographic processing provides an imagewise distribution of a photographically inert compound which can react with a uniform distribution of a second compound contained in the element to form a photographically active compound.
    Type: Grant
    Filed: November 5, 1993
    Date of Patent: October 11, 1994
    Assignee: Eastman Kodak Company
    Inventors: David T. Southby, Daniel L. Kapp, Wojciech Slusarek, Louis E. Friedrich, Zbyslaw R. Owczarczyk, Xiqiang Yang
  • Patent number: 5318879
    Abstract: A color photographic element is disclosed comprising a support bearing at least one photographic silver halide emulsion layer, an image dye-forming coupler, and a coupler (A) capable of forming a compound that is washed out of the photographic element upon processing and capable of releasing a bleach accelerator group, wherein the coupler (A) is represented by the formula:(SOL).sub.x --COUP--(R.sup.1).sub.y --(R.sup.2).sub.z --BLEACH.
    Type: Grant
    Filed: June 29, 1992
    Date of Patent: June 7, 1994
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Stephen P. Singer, David T. Southby, Donald Singleton, Jr.
  • Patent number: 5302498
    Abstract: A photographic element including a support bearing at least one photographic silver halide emulsion layer and bearing on the opposite side of the support a layer containing at least one blocked developing agent or precursor thereof provides automatic developing agent replenishment of the developing bath upon processing.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: April 12, 1994
    Assignee: Eastman Kodak Company
    Inventors: David T. Southby, John Texter, Timothy Glover