Patents Represented by Attorney Richard E. Knapp
  • Patent number: 5272043
    Abstract: A photographic DIR (development inhibitor-releasing) acetanilide coupler containing a carboxy group on the anilide moiety or a DIR naphtholic coupler containing on the 2-position a --CONH.sub.2 or --CONHCH.sub.3 group, capable upon oxidative coupling of forming a dye capable of being washed out of a photographic element upon processing, contains, in the coupling position, a coupling-off group comprising, in sequence, at least one ballasted linking group and at least one releasable development-inhibitor group (INH) which is a mercaptotetrazole group which enables a Log P in a pH 10 buffer of lower than -0.8. Such a DIR coupler is especially useful in a color photographic silver halide material and process which enables the dye formed from the DIR coupler to be washed out of the photographic material upon processing and enhanced color saturation through interimage effects.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: December 21, 1993
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Hans G. Ling
  • Patent number: 5049484
    Abstract: Improved chemical sensitization is provided by a photographic silver halide emulsion chemically sensitized with water-soluble gold(I) compound represented by the formula: ##STR1## wherein Z represents the substituted or unsubstituted nitrogen and carbon atoms necessary to complete a 5- or 6-member imide nucleus; and M is a cation. Such a chemically sensitized photographic silver halide emulsion is useful in a photographic silver halide element and process.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: September 17, 1991
    Assignee: Eastman Kodak Company
    Inventor: Joseph C. Deaton
  • Patent number: 5049485
    Abstract: A photographic silver halide material is chemically sensitized with a soluble gold(I) compound of the formula:AuL.sub.2.sup.+ X.sup.- or AuL(L.sup.1).sup.+ X.sup.-wherein L is a mesoionic compound; X is an anion; and L.sup.1 is a Lewis donor ligand. The novel gold(I) compounds possess properties which are advantageous compared to the properties of previously known gold compounds.
    Type: Grant
    Filed: November 16, 1990
    Date of Patent: September 17, 1991
    Assignee: Eastman Kodak Company
    Inventor: Joseph C. Deaton
  • Patent number: 5026628
    Abstract: Photographic compound (A) capable of releasing a photographically useful group is represented by the formula: SOL-CAR-LINK-PUG wherein SOL is a water-solubilizing group; CAR is a carrier moiety that, upon reaction with oxidized developing agent, is capable of releasing LINK-PUG and capable of forming a compound that is washed out of the photographic element during photographic processing; LINK-PUG is in turn capable of releasing a photographically useful group (PUG) during photographic processing and LINK-PUG is represented by the formula: ##STR1## wherein X, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and PUG are as defined in the application. The photographic compound (A) enables formation of easily removable compounds in photographic elements and processes that provide images having improved acutance.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: June 25, 1991
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Teh-Hsuan Chen, Kenneth N. Kilminster, Jerrold N. Poslusny, Wojciech Slusarek
  • Patent number: 5021322
    Abstract: Photographic compound (A) capable of releasing a development inhibitor group by means of a displacement reaction enables increased image acutance when the compound contains in a coupling position a coupling-off group represented by the formula: ##STR1## wherein X, R.sub.1, R.sub.2, R.sub.3, R.sub.4, and Q are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process.
    Type: Grant
    Filed: February 22, 1990
    Date of Patent: June 4, 1991
    Assignee: Eastman Kodak Company
    Inventors: William J. Begley, Teh-Hsuan Chen
  • Patent number: 5021333
    Abstract: A photographic yellow dye-forming coupler is represented by the formula: ##STR1## wherein: R.sup.1 is alkyl of 1 to 4 carbon atoms;ball is a ballast group of such size and configuration as to render the coupler nondiffusible in a photographic element;Y is CO, PO.sub.3 or SO.sub.2 ;X is an aryloxy coupling-off group; andn is 1 or, when Y is PO.sub.3, n is 2.Such a coupler is useful in a color photographic silver halide element and process to provide improved activity.
    Type: Grant
    Filed: August 24, 1990
    Date of Patent: June 4, 1991
    Assignee: Eastman Kodak Company
    Inventors: Llewellyn J. Leyshon, Paul R. Buckland, Paul A. Burns
  • Patent number: 5021325
    Abstract: A pyrazolotriazole dye-forming coupler containing on a carbon atom in a non-coupling position a ballast group derived from and bonded through a carboxylic acid portion of an unsubstituted or substituted amino acid provides useful magenta dye images in a photographic material and process and enables simplification of manufacture of the coupler. Such couplers are useful in photographic silver halide materials and processes.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: June 4, 1991
    Assignee: Eastman Kodak Company
    Inventors: Paul A. Burns, John W. Harder
  • Patent number: 5019492
    Abstract: A novel blocked photographically useful compound comprises a new blocking group that (a) comprises two electrophilic groups, the least electrophilic of which is bonded directly or through a timing group to the photographically useful group (PUG) of the compound, (b) is capable of reacting with a dinucleophile reagent, and (c) has the two electrophilic groups separated from each other by a bond or unsubstituted or substituted atom that enables nucleophilic displacement to occur with release of PUG when the compound is reacted with a dinucleophile reagent. Such a blocked photographically useful compound is useful in a photographic material and process to provide increased stability and enable more rapid release of the photographically useful group upon reaction with a dinucleophile reagent.
    Type: Grant
    Filed: April 26, 1989
    Date of Patent: May 28, 1991
    Assignee: Eastman Kodak Company
    Inventors: John M. Buchanan, Ewell R. Cook, Jared B. Mooberry, Gary S. Proehl, Stephen P. Singer, William N. Washburn
  • Patent number: 5019489
    Abstract: A combination in a color photographic silver halide element and process of at least one red-sensitive silver halide emulsion layer comprising a particular phenolic cyan dye-forming coupler with at least one green-sensitive silver halide emulsion layer comprising a particular pyrazolo[3,2-c]-s-triazole coupler and at least one blue-sensitive silver halide emulsion layer comprising a particular pivaloylacetanilide yellow dye-forming coupler enables improved color saturation of dye images, better relation of speed to grain characteristics and reduced unwanted spectral absorption of dye images formed. This combination is particularly useful in color photographic silver halide materials and processes for forming improved reversal dye images.
    Type: Grant
    Filed: July 26, 1989
    Date of Patent: May 28, 1991
    Assignee: Eastman Kodak Company
    Inventor: Arlyce T. Bowne
  • Patent number: 5008180
    Abstract: A photographic rocording material is disclosed which contains a phenolic cyan dye-forming coupler which has a sulfone or a modified sulfone group in the 5- position ballast moiety and a substituted acylamino group in the 2- position of the phenolic ring.
    Type: Grant
    Filed: February 2, 1990
    Date of Patent: April 16, 1991
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, David Hoke
  • Patent number: 5006448
    Abstract: A photographic recording material is disclosed which contains a compound capable of releasing a development inhibitor moiety during photographic processing which enhances development inhibition and reduces interlayer interimage effects without adversely affecting photographic properties.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: April 9, 1991
    Assignee: Eastman Kodak Company
    Inventors: Richard P. Szajewski, Paul A. Burns, Jerrold N. Poslusny, Norma B. Platt, Timothy D. Norden
  • Patent number: 4992361
    Abstract: Novel 1H-pyrazolo[3,2-c]-s-triazole dye-forming couplers containing in the 3-position a tertiary carbon group enable more extensive development of silver halide images in photographic silver halide materials and enable preparation of improved dispersions in photographic silver halide materials because of reduced tendency to form crystals. These couplers are useful in photographic silver halide materials and processes.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: February 12, 1991
    Assignee: Eastman Kodak Company
    Inventors: Arlyce T. Bowne, Sharon E. Normandin
  • Patent number: 4990436
    Abstract: Tetrahydroquinoline rings fused to a phenolic ring form novel cyan due-forming coupler compounds which produce dyes having improved resistance to ferrous ion reduction.Photographic recording materials containing such coupler compounds are also disclosed.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: February 5, 1991
    Assignee: Eastman Kodak Company
    Inventor: Philip T. S. Lau
  • Patent number: 4990430
    Abstract: A method of retouching a dye image comprises selective removal with an aqueous acidic organic solvent solution, as described in the application, of a portion of a dye image from an exposed and processed photographic silver halide element comprising a support bearing a dye image from a dye-forming coupler and a primary amine photographic color developing agent, wherein the dye-forming coupler: (a) contains no ionizable group that is retained as part of a dye formed upon oxidative coupling, (b) has a structure such that the Log P of the coupler is greater than 4 and is derived from a four-equivalent coupler that has a Log P less than 8, and (c) has a coupling reactivity that enables formation of maximum image density of at least 0.6. The method comprises the step of contacting the dye image with an aqueous acidic organic solvent solution, as described in the application, for a time and at a temperature sufficient to selectively dissolve and remove a portion of the dye image from the photographic element.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: February 5, 1991
    Assignee: Eastman Kodak Company
    Inventors: John W. Harder, Paul A. Burns
  • Patent number: 4980275
    Abstract: A photographic silver halide material comprises an organophosphorus dye stabilizer represented by the formula: ##STR1## wherein A represents the atoms necessary to complete a substituted or unsubstituted heterocyclic ring;R.sub.1 represents substituted or unsubstituted alkyl, substituted or unsubstituted cycloalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted aryl, or a heterocyclic group;Y is an oxygen or a sulfur atom; and,n is 0 or 1.Such a photographic silver halide material enables improved stability of dye images in the material.
    Type: Grant
    Filed: March 13, 1989
    Date of Patent: December 25, 1990
    Assignee: Eastman Kodak Company
    Inventor: John D. Goddard
  • Patent number: 4980267
    Abstract: A combination of a development inhibitor releasing coupler having a particular releasable mercaptotetrazole group with a particular alkoxy-benzoyl yellow dye-forming coupler as described in the specification in a photographic silver halide element and process enables improved dye images upon exposure and processing. This combination of couplers enables particularly improved dye images in a color photographic element and process comprising a particular phenolic cyan dye-forming coupler and a particular pyrazolo[3,2-c]-s-triazole magenta dye-forming coupler.
    Type: Grant
    Filed: August 30, 1988
    Date of Patent: December 25, 1990
    Assignee: Eastman Kodak Company
    Inventor: Terry R. Taber
  • Patent number: 4978605
    Abstract: A non-diffusible, yellow dye image-forming benzoylacetanilide coupler having an aryloxy coupling-off group where (a) the benzoyl group comprises a substituent R.sup.1 O-- wherein R.sup.1 is an alicyclic or aliphatic, unsubstituted or substituted, branched or unbranched hydrocarbon group; and, (b) at least one of the benzoyl group and acetanilide group comprise a substituent that comprises a branched alkyl group containing at least 4 carbon atoms wherein the alkyl chains are uninterrupted or interrupted by hetero atoms or groups, enables improved solubility in coupler solvents in a photographic material, and the yellow dyes resulting from such couplers upon oxidative coupling have improved light stability. Such couplers are advantageous in photographic silver halide elements and processes.
    Type: Grant
    Filed: January 6, 1989
    Date of Patent: December 18, 1990
    Assignee: Eastman Kodak Company
    Inventor: Siu C. Tsoi
  • Patent number: 4973535
    Abstract: This invention relates to a color photographic silver halide recording material containing a dye image-forming coupler compound and a sulfonamide compound which is capable of altering the spectral absorption properties of a dye formed by reaction of the coupler compound with oxidized developing agent.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: November 27, 1990
    Assignee: Eastman Kodak Company
    Inventors: Paul B. Merkel, David J. Giacherio
  • Patent number: 4973545
    Abstract: A photographic coupler containing an aryloxysilyl group (--X--O--Y) wherein X is substituted or unsubstituted arylene and Y is a silyl group) is useful in photographic silver halide elements and processes. Such a photographic coupler enables improved dispersibility and improved photographic properties.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: November 27, 1990
    Assignee: Eastman Kodak Company
    Inventor: Christopher P. Moore
  • Patent number: 4973548
    Abstract: A photographic silver bromoiodide emulsion comprises a dispersing medium and a silver bromoiodide that (a) is monodispersed, cubic grain silver bromoiodide; (b) has a grain size within the range of 0.1 to 0.7 micron; (c) contains 1 to 7 mole percent iodide; and, (d) is prepared by a process comprising (i) forming the silver bromoiodide grains by mixing, in the presence of a thioether ripening agent, silver salt and alkali metal bromide and iodide salts until 60 to 90% of the silver salts have been added; then, (ii) carrying out the remainder of the silver bromoiodide grain formation with the addition of silver salt and alkali metal bromide and iodide salts that are no more than 1 mole percent iodide; wherein the resulting silver bromoiodide grains have no discernible shell as analyzed by x-ray diffraction. Such photographic silver bromoiodide emulsions are useful in photographic silver halide materials to provide longer exposure latitude.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: November 27, 1990
    Assignee: Eastman Kodak Company
    Inventor: Elizabeth P. Chang