Carbohydrate Or Derivative Containing Patents (Class 430/639)
  • Patent number: 7332267
    Abstract: Disclosed is a photothermographic material comprising an image forming layer containing at least a light-sensitive silver halide, a light-insensitive organic silver salt, a reducing agent and a binder and a non-image forming layer on at least one surface of a support, wherein 50% by weight or more of the binder is a hydrophilic binder, the light-sensitive material further comprising a metal phthalocyanine compound represented by the following formula (PC-1): wherein M represents a metal atom, R1, R4, R5, R8, R9, R12, R13 and R16 respectively represent a hydrogen atom or a substituent where at least one of R1, R4, R5, R8, R9, R12, R13 and R16 is an electron attractive group and R2, R3, R6, R7, R10, R11, R14 and R15 respectively represent a hydrogen atom or a substituent.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: February 19, 2008
    Assignee: FUJIFILM Corporation
    Inventors: Hajime Nakagawa, Seiichi Yamamoto, Masahiko Taniguchi
  • Patent number: 7226728
    Abstract: The present invention provides a photothermographic material having: a support and an image-forming layer including a photosensitive silver halide, a non-photosensitive organic silver salt, a reducer, and a binder on at least one surface of the support, wherein the photothermographic material further contains a dye having a half breadth of 100 nm or less at a maximum absorbance peak, and 50 mass % or more of a binder in an outermost layer on a dye-containing surface is a polymer latex.
    Type: Grant
    Filed: September 12, 2005
    Date of Patent: June 5, 2007
    Assignee: Fujifilm Corporation
    Inventor: Rikio Inoue
  • Patent number: 7172855
    Abstract: Disclosed is a silver halide photographic light-sensitive material having a layer containing a compound of the following formula and a fluorine compound, and has a gamma of 5.0 or more for the optical density range of 0.3 to 3.0: wherein R1 is alkyl or alkenyl, R2 are H, alkyl, alkenyl, aralkyl or aryl, l1 is 1–10, m1 is 1–30, n1 is 0–4, a is 0 or 1, and Z1 is OSO3M or SO3M where M is cation.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: February 6, 2007
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Shoji Yasuda, Yoshihisa Tsukada
  • Patent number: 7157218
    Abstract: A photothermographic material contains a support having thereon an image forming layer containing a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, and a non-photosensitive outermost layer on a side of the support where the image forming layer is provided, The photosensitive silver halide contains silver iodide in an amount of from 40 to 100% by mole, and a binder contained in the outermost layer contains at least one of a latex polymer and a water soluble polymer that is not derived from an animal protein in an amount of 50% by mass or more.
    Type: Grant
    Filed: December 30, 2003
    Date of Patent: January 2, 2007
    Assignee: Fujifilm Corporation
    Inventor: Keiichi Suzuki
  • Patent number: 7157217
    Abstract: A photothermographic material comprising, on a support, an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, and a non-photosensitive outermost layer at a surface side of the support at which the image forming layer is provided, wherein: 1) the non-photosensitive organic silver salt contains 90% by mole or more of silver behenate; and a binder in the outermost layer contains 50% by weight or more of a hydrophobic polymer latex, 2) the outermost layer contains a polymer latex; and a layer adjacent to the outermost layer contains a binder which can lose fluidity upon a decrease in temperature, or 3) the outermost layer contains a polymer latex; and a coating solution for forming the outermost layer can lose fluidity upon a decrease in temperature.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: January 2, 2007
    Assignee: Fujifilm Corporation
    Inventors: Hajime Nakagawa, Yoshihisa Tsukada, Keiichi Suzuki
  • Patent number: 6875565
    Abstract: A silver halide emulsion which comprises silver halide tabular grains showing an average thickness lower than 0.15 ?m, an average diameter of at least 1.20 ?m and an average aspect ratio of at least 8:1 dispersed in a hydrophilic colloid mixture comprising from 10% to 30% by weight of dextran, from 20% to 40% by weight of a hydrogenated polysaccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin and photographic element comprising it.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: April 5, 2005
    Assignee: Ferrania, S.p.A.
    Inventors: Luca Ceruti, Simona Fava
  • Publication number: 20040126717
    Abstract: A photothermographic material comprising, on a support, an image forming layer containing at least a photosensitive silver halide, a non-photosensitive organic silver salt, a reducing agent and a binder, and a non-photosensitive outermost layer at a surface side of the support at which the image forming layer is provided, wherein:
    Type: Application
    Filed: December 15, 2003
    Publication date: July 1, 2004
    Inventors: Hajime Nakagawa, Yoshihisa Tsukada, Keiichi Suzuki
  • Publication number: 20040086814
    Abstract: A silver halide emulsion which comprises silver halide tabular grains showing an average thickness lower than 0.15 &mgr;m, an average diameter of at least 1.20 &mgr;m and an average aspect ratio of at least 8:1 dispersed in a hydrophilic colloid mixture comprising from 10% to 30% by weight of dextran, from 20% to 40% by weight of a hydrogenated polysaccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin and photographic element comprising it.
    Type: Application
    Filed: October 30, 2003
    Publication date: May 6, 2004
    Applicant: Ferrania, S.p.A.
    Inventors: Luca Ceruti, Simona Fava
  • Patent number: 6713241
    Abstract: Aqueous-based thermally sensitive emulsions and imaging materials include a mixture of binders in at least one imaging layer. These binder mixtures include from 70 to about 99 weight % of hydrophilic binders such as gelatin and gelatin derivatives, and the remainder of the total binder weight is composed of one or more hydrophobic binders or water-dispersible polymer latexes. These binder mixtures are particularly useful in imaging layers of thermographic and photothermographic materials and provide long term keeping and reduced crystallization of fatty acids.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: March 30, 2004
    Assignee: Eastman Kodak Company
    Inventors: Kathleen M. Vaeth, Charles L. Bauer, Jon A. Hammerschmidt, David M. Teegarden
  • Patent number: 6670111
    Abstract: The present invention refers to a process for preparing a dispersion which comprises codispersing in an aqueous medium a sucrose derivative represented by the following general formula (1), wherein substituents X1 to X8, being the same or different, are represented by a hydrogen atom, an alkyl group or an acyl group, with the proviso that at least four of the X1 to X8 substituents are different from hydrogen and that the total sum of the carbon atoms of X1 to X8 substituents is at least sixteen; and a photographic compound represented by the following general formula (2), wherein R and R1 each independently represent a hydrogen atom, an alkyl group, an alkylene group, a heterocyclic group or an aryl group; R2, R3 and R4 each independently represent a hydrogen atom, an alkyl group, an aryl group and R3 and R4 may be combined to form a 6-membered ring.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: December 30, 2003
    Assignee: Ferrania, S.p.A.
    Inventors: Corrado Balestra, Mauro Besio, Emilio Prosperi
  • Patent number: 6664038
    Abstract: A silver halide emulsion which comprises silver halide grains dispersed in a hydrophilic colloid mixture comprising from 5% to 25% by weight of dextran, from 20% to 40% by weight of hydrogenated poly-saccharide having an average molecular weight equal to or lower than 10,000, and from 40% to 60% by weight of gelatin. A fore-hardened photographic material comprising such an emulsion and the use of such an emulsion in a photographic material increases the sensitometry and mechanical resistance of such a photographic material.
    Type: Grant
    Filed: September 27, 2002
    Date of Patent: December 16, 2003
    Assignee: Ferrania, S.p.A.
    Inventors: Luca Ceruti, Eva Genesio, Gianluigi Molinari, Ivo Zullo
  • Patent number: 6573036
    Abstract: A single-side coated light-sensitive silver halide photographic film material has been disclosed, having on one side of a subbed support, one or more light-sensitive silver halide emulsion layer(s) overcoated with an outermost protective layer; and, at the other side of said support, a backing layer, covered with a protective outermost layer, characterized in that at least said backing layer is provided with a layer wherein, besides a cross-linked or cross-linkable first binder an organic component free from cross-linking upon reaction with a hardener is present as a second binder having a low molecular weight.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: June 3, 2003
    Assignee: Afga-Gevaert
    Inventors: Mark Van den Zegel, Francis Vanhoudt, Frank Ruttens, Guy Damen
  • Patent number: 6518007
    Abstract: This invention relates to a multicolor silver halide photographic element comprising a support and at least one high bromide silver halide emulsion layer comprising low fogging tabular silver halide grains, said element further comprising an antifoggant represented by the following Structure I: R1—SO2—C(R2)R3—(CO)m—(L)n—SG  I wherein R1 is an aliphatic or cyclic group, R2 and R3 are independently hydrogen or bromine as long as at least one of them is bromine, L is a divalent linking group, m and n are independently 0 or 1, and SG is a solubilizing group that has a pKa of 8 or less.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: February 11, 2003
    Assignee: Eastman Kodak Company
    Inventors: Kenneth J. Reed, George J. Burgmaier, John E. Keevert, Roger L. Klaus
  • Patent number: 6485896
    Abstract: A photographic film comprising a base layer and at least one emulsion layer, the emulsion layer having a melting temperature that is within 4 degrees centigrade of the incubation temperature used in an accelerated core-set test.
    Type: Grant
    Filed: December 6, 2000
    Date of Patent: November 26, 2002
    Assignee: Eastman Kodak Company
    Inventors: Jehuda Greener, Yongcai Wang, Gary W. Visconte
  • Patent number: 6395465
    Abstract: A process for precipitating a high bromide silver halide emulsion in an aqueous medium is disclosed comprising growing nucleated silver halide grains in a reaction vessel in the presence of a peptizer comprising a water dispersable starch to form high bromide radiation-sensitive silver halide grains, wherein the majority of grain growth in the reaction vessel is performed at a pH of less than 3.5. Growth of high bromide silver halide emulsion grains in the presence of a starch peptizer at low pH in accordance with the invention results in emulsion grains with lower fog, even in the absence of the use of strong oxidizing agents during grain precipitation.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: May 28, 2002
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Victor P. Scaccia
  • Patent number: 6391534
    Abstract: A process for precipitating a high bromide silver halide emulsion in an aqueous medium is described comprising precipitating high bromide radiation-sensitive silver halide grains in a reaction vessel in the presence of a peptizer comprising a water dispersable starch, wherein a strong oxidizing agent is added to the reaction vessel during or after the precipitation at a pH of less than 4.0 such that an oxidation potential of at least 650 mV (Ag/AgCl ref.) is achieved. A reduction in the rate of reaction between strong oxidants such as bromine and starch at such low pH has been found to enable an advantageous decrease in the amount of oxidant required to achieve and maintain a high oxidation potential during emulsion grain precipitation. Starch, unlike gelatin, also advantageously has adequate stability at the combination of high acidity and high emulsion precipitation temperatures.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: May 21, 2002
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Victor P. Scaccia
  • Patent number: 6365336
    Abstract: There is disclosed an aqueous photothermographic composition comprising a) a photosensitive silver halide emulsion precipitated in a water dispersible cationic starch peptizing agent and b) an oxidation-reduction imaging forming composition comprising (I) a colloidal dispersion of silver compound particles and (ii) an organic reducing agent. The use of a starch peptizing agent reduces the fog in an element using the composition upon thermal processing.
    Type: Grant
    Filed: October 31, 2000
    Date of Patent: April 2, 2002
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, David A. Dickinson, Mark Lelental
  • Patent number: 6235461
    Abstract: The present invention relates to a process for manufacturing a silver halide photographic element comprising the step of adding to a silver halide emulsion (1) an aryl compound having at least two hydroxyl groups and at least one additional substituent represented by a sulfonic group, an alkali metal sulfonate group, a hydroxyl group, a carboxy group or a hydroxymethyl group, and (2) a polyhydroxyalkyl derivative selected from the group consisting of non-hydrogenated polysaccharides having an average molecular weight higher than 10,000 and hydrogenated polysaccharides having an average molecular weight equal to or lower than 10,000. The use of such a combination to increase the speed to Dmin ratio of a silver halide photographic element and a silver halide element comprising such a combination is also claimed.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: May 22, 2001
    Assignee: Tulalip Consultoria Comercial Sociedade Unipessoal S.A.
    Inventors: Alain Dominique M. Sismondi, Marco Serafini
  • Patent number: 6225036
    Abstract: 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 tabular grains having {111} major faces containing greater than 50 mole percent bromide, and accounting for greater than 50 percent total grain projected area precipitated in a peptizer that is a water dispersible cationic starch, and contains a fragmentable electron donating sensitizer.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: May 1, 2001
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Kenneth J. Reed, Victor P. Scaccia, James A. Friday
  • Patent number: 6187525
    Abstract: 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: Grant
    Filed: December 17, 1998
    Date of Patent: February 13, 2001
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Kenneth J. Reed, Victor P. Scaccia, James A. Friday
  • Patent number: 6174660
    Abstract: A silver halide photographic light-sensitive material comprising a support having thereon at least a light-sensitive silver halide emulsion layer containing a light-sensitive silver halide emulsion and at least a nonlight-sensitive layer, wherein said silver halide photographic light-sensitive material contains a compound represented by the following formula (1) and said silver halide photographic light-sensitive material further contains a vinylsulfone group containing hardener. HOCH2(CHOH)mCH2OH  Formula (1) wherein m represents an integer of 0 to 6.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: January 16, 2001
    Assignee: Konica Corporation
    Inventors: Takesi Nakamura, Katsumasa Yamazaki
  • Patent number: 6090536
    Abstract: A photographic emulsion is disclosed containing for enhanced imaging speed high bromide {111} tabular grain emulsion peptizer with a cationic starch and sensitized with a fragmentable electron donating sensitizer. The photographic emulsion is disclosed for use in black-and-white and color photographic elements.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: July 18, 2000
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Kenneth J. Reed, Victor P. Scaccia, James A. Friday
  • Patent number: 6071681
    Abstract: A method for producing a silver halide photographic light-sensitive material is disclosed, which comprises a support having thereon a silver halide emulsion layer and optionally another hydrophilic colloid layer. The method comprises the steps of (1) coating a coating solution of the silver halide emulsion layer or that of the hydrophilic colloid layer on the support, and (2) drying the coated layer, and the coating solution of the silver halide emulsion layer or that of the hydrophilic colloid layer comprises gelatin and a sugaralcohol.
    Type: Grant
    Filed: May 18, 1998
    Date of Patent: June 6, 2000
    Assignee: Konica Corporation
    Inventors: Kiyokazu Morita, Hideki Hoshino, Shinichi Suzuki
  • Patent number: 6027869
    Abstract: A photographic element is disclosed having at least one emulsion layer comprised of (a) radiation-sensitive silver halide grains, (b) sensitizer for the radiation-sensitive silver halide grains, (c) hydrophilic colloid vehicle, including peptizer for the radiation-sensitive silver halide grains, and (d) light scattering particles, wherein (a) the radiation-sensitive silver halide grains include tabular grains (1) having an aspect ratio of at least 2.0, (2) having {111} major faces, (3) containing greater than 50 mole percent bromide, based on silver, and (4) accounting for greater than 50 percent total grain projected area, (b) the sensitizer includes a fragmentable electron donating sensitizer, (c) the peptizer is a water dispersible cationic starch, and (d) the light scattering particles have aspect ratios of less than 1.5 and can be dissolved for removal from the emulsion layer. The photographic elements exhibit enhanced imaging speed and can be employed for color or black-and-white photographic imaging.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: February 22, 2000
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Kenneth J. Reed, Victor P. Scaccia, James A. Friday
  • Patent number: 5882838
    Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound or an ethylenically unsaturated cross-linkable polymer. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or the light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 50 mol %: ##STR1## in which each of n1 and n2 is an integer of 10 to 5,000; each of R.sup.1 and R.sup.2 is hydrogen, an alkyl group or an aryl group; X is --O--R.sup.4 --O-- or --NR.sup.5 --; R.sup.4 is an alkylene group, an alkyleneoxyalkylene group, an arylene group or an aralkylene group; R.sup.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: March 16, 1999
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Satoshi Hoshi, Hiroyuki Nagase
  • Patent number: 5849471
    Abstract: A silver halide light-sensitive photographic containing a hydrophilic colloid layer containg dextran or a compound of the following formula and subbing layer containing metal oxide is disclosed. ##STR1## R.sub.1 and R.sub.2 each independently represent a hydroxy group, --OM group, an amino group, an acylamino group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkoxycarbonylamino group, a mercapto group or an alkylthio group, and M represents an alkali metal atom or an ammonium group and X represents two vinyl carbons substituted by R.sub.1 and R.sub.2 and an atom group necessary for forming a 5-6 ring together with carbonyl carbon.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: December 15, 1998
    Assignee: Konica Corporation
    Inventor: Yoshihiro Haga
  • Patent number: 5843619
    Abstract: A silver halide light-sensitive material comprises a support, a hardening layer and a light-sensitive layer. The hardening layer contains an ethylenically unsaturated polymerizable compound and a hydrophobic polymer having an acidic group. The light-sensitive layer contains silver halide and a hydrophilic polymer. The hardening layer or the light-sensitive layer contains a reducing agent. An adhesive layer or a light-sensitive layer contains a water-soluble synthetic polymer. The adhesive layer is provided between the hardening layer and the light-sensitive layer. The water-soluble synthetic polymer comprises a repeating unit represented by the formula (I) in an amount of at least 10 mol %: ##STR1## in which each of R.sup.1 and R.sup.2 independently is hydrogen, an aliphatic group or an aromatic group.
    Type: Grant
    Filed: September 19, 1997
    Date of Patent: December 1, 1998
    Assignee: Fuji Photo Film Co., Ltd.
    Inventor: Satoshi Hoshi
  • Patent number: 5792602
    Abstract: A process is disclosed of preparing a photographically useful emulsion containing radiation-sensitive silver iodohalide grains. Silver halide grains having a face centered cubic rock salt crystal lattice structure are precipitated within an aqueous dispersing medium including a hydrophilic colloid peptizer. Iodide ion is introduced into the crystal lattice structure by introducing elemental iodine into the dispersing medium and maintaining the dispersing medium within a pH range of from 5 to 8.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: August 11, 1998
    Assignee: Eastman Kodak Company
    Inventors: Joe E. Maskasky, Victor P. Scaccia, Samuel Chen
  • Patent number: 5733718
    Abstract: A radiation-sensitive silver halide emulsion for use in photographic is disclosed containing an oxidized cationic starch as a peptizer. The oxidized cationic starch facilitates emulsion precipitation and chemical sensitization.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: March 31, 1998
    Assignee: Eastman Kodak Company
    Inventor: Joe Edward Maskasky
  • Patent number: 5698384
    Abstract: Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer and an electrically-conductive layer comprising electronically-conductive fine particles, such as antimony-doped tin oxide particles, and gelatin-coated water-insoluble polymer particles. The use of gelatin-coated water-insoluble polymer particles as a binder in the electrically-conductive layer facilitates the preparation of stable coating compositions and provides a layer with a high degree of conductivity at low concentrations of electronically-conductive fine particles and with excellent abrasion resistant properties.
    Type: Grant
    Filed: December 5, 1995
    Date of Patent: December 16, 1997
    Assignee: Eastman Kodak Company
    Inventors: Charles Chester Anderson, Yongcai Wang, James Lee Bello, Mario Dennis DeLaura
  • Patent number: 5691131
    Abstract: A photographic emulsion is disclosed comprised of a radiation-sensitive high bromide tabular grain emulsion. At least 50 percent of total grain projected area is accounted for by tabular grains each comprised of (a) less than 12 mole percent iodide and greater than 50 mole percent bromide, based on silver, (b) a central region accounting for at least 50 percent of grain projected area, and (c) a peripheral region containing crystal lattice dislocations and a higher iodide concentration than the overall average iodide concentration of the tabular grains. The emulsion contains a hydrophilic colloid peptizer derived from a water dispersible cationic starch.The iodide and dislocations in the peripheral regions contribute to increased photographic speeds. The water dispersing cationic starch facilitates emulsion precipitation and chemical sensitization.
    Type: Grant
    Filed: November 21, 1996
    Date of Patent: November 25, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5667955
    Abstract: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 50 mole percent bromide, based on silver, (c) accounting for greater than 70 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m, show an enhanced capability for chemical sensitization by reason of employing an oxidized cationic starch as a peptizer.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe Edward Maskasky
  • Patent number: 5629142
    Abstract: A dual coated radiographic element is disclosed including at least one radiation-sensitive emulsion comprised of silver halide grains containing greater than 50 mole percent bromide and less than 4 mole percent iodide, based on silver, with greater than 50 percent of total grain projected area being accounted for by tabular grains having {111} major faces, a spectral sensitizing dye adsorbed to the surfaces of the silver halide grains, and hydrophilic colloid vehicle acting as a peptizer and a binder for the silver halide grains. At least the portion of the vehicle acting as a peptizer is a hydrophilic colloid derived from a water dispersible cationic starch.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: May 13, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5620840
    Abstract: A high bromide tabular grain photographic emulsion is disclosed containing as a peptizer a water dispersible cationic starch.
    Type: Grant
    Filed: May 2, 1996
    Date of Patent: April 15, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5607828
    Abstract: A radiation-sensitive emulsion comprised of silver halide grains including tabular grains (a) having {100} major faces, (b) containing greater than 50 mole percent chloride, based on silver, (c) accounting for greater than 30 percent of total grain projected area, (d) exhibiting an average thickness of less than 0.3 .mu.m, and (e) exhibiting an average aspect ratio of greater than 5, and a dispersing medium including a peptizer adsorbed to the silver halide grains, wherein the peptizer is a water dispersible oxidized cationic starch.
    Type: Grant
    Filed: June 14, 1996
    Date of Patent: March 4, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5604085
    Abstract: An improved spectrally sensitized ultrathin tabular grain emulsion is disclosed in which tabular grains (a) having {111} major faces, (b) containing greater than 50 mole percent bromide, based on silver, (c) accounting for greater than 70 percent of total grain projected area, (d) exhibiting an average equivalent circular diameter of at least 0.7 .mu.m, and (e) exhibiting an average thickness of less than 0.07 .mu.m, show an enhanced capability for chemical sensitization by reason of employing a cationic starch as a peptizer.
    Type: Grant
    Filed: December 19, 1995
    Date of Patent: February 18, 1997
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5474889
    Abstract: A coating composition suitable for use in the preparation of a photographic material comprises an aqueous solution of a hydrophilic colloid and a surface active coating aid having the formulaCF.sub.3 (CF.sub.2).sub.n CH.sub.2 O(glycidyl).sub.m Hwhereinn is an integer from 4 to 7; and,m is an integer from 6 to 45.
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: December 12, 1995
    Assignee: Eastman Kodak Company
    Inventors: Alan R. Pitt, Bernard A. Clark, John F. Padday
  • Patent number: 5451497
    Abstract: The tendency of a photographically useful compound (PUC) to crystallize when dispersed in an aqueous medium is inhibited by codispersing with the PUC a non-color forming, oil-soluble, monomeric or oligomeric organic compound having a glass transition temperature between 0.degree. and 150.degree. C. Preferred organic compounds are oil-soluble sucrose esters, such as sucrose octaacetate, and rosin and derivatives thereof.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: September 19, 1995
    Assignee: Eastman Kodak Company
    Inventors: David D. Miller, Krishnan Chari
  • Patent number: 5426019
    Abstract: Yellowing, dye fade and thermal pinking of a processed color photographic element is improved by incorporating into the photographic element a non-color forming, oil-soluble, monomeric or oligomeric organic compound having a glass transition temperature between 0.degree. and 150.degree. C. Preferred organic compounds include rosin derivatives, natural resins and oil-soluble sucrose esters, etc. In a particularly preferred embodiment, the above-noted properties are improved by incorporating into the photographic element an oil-soluble rosin derivative, such as abietic acid.
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: June 20, 1995
    Assignee: Eastman Kodak Company
    Inventor: Krishnan Chari
  • Patent number: 5370966
    Abstract: The invention discloses an aqueous-developable chromogenic photographic heat-transferable non-aqueous dye-diffusion-transfer photographic element comprising radiation sensitive silver halide, a dye-providing compound that forms or releases a heat-transferable, image dye upon reaction of said compound with the oxidation product of a primary amine developing agent, a hydrophilic binder, and a thermal solvent for facilitating non-aqueous diffusion transfer wherein said thermal solvent comprises a sugar group containing amphiphilic compound, said amphiphilic compound comprising from one to three independently constituted 3 to 22 carbon atom hydrophobic tail(s) with one or more attached hydrophilic mono or oligosaccaridic rings or chains such that the HLB value of the compound is less than about 13.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: December 6, 1994
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, David S. Bailey
  • Patent number: 5370986
    Abstract: Polyhydroxyalkyl compounds and co-stabilizing agents are used to impart stabilizing or antifogging properties to photographic recording materials.
    Type: Grant
    Filed: November 3, 1992
    Date of Patent: December 6, 1994
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Arthur H. Herz
  • Patent number: 5352563
    Abstract: A silver halide photographic light-sensitive material is disclosed, which comprises a support and provided thereon, a silver halide photographic emulsion layer and a protective layer in that order, wherein at least one layer of said emulsion layer and said protective layer contains a cyclodextrin compound and said emulsion layer contains a hydrazine derivative or a compound represented by the following formula (T): ##STR1##
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: October 4, 1994
    Assignee: Konica Corporation
    Inventors: Satomi Kawasaki, Shyouji Nishio, Hideki Komatsu
  • Patent number: 5340676
    Abstract: Imaging elements, such as photographic, electrostatographic and thermal imaging elements, are comprised of a support, an image-forming layer and an electrically-conductive layer comprising a film-forming hydrophilic colloid having dispersed therein both electrically-conductive metal-containing particles and water-insoluble polymer particles. The combination of hydrophilic colloid, metal-containing particles and water-insoluble polymer particles provides a controlled degree of electrical conductivity and beneficial chemical, physical and optical properties which adapt the electrically-conductive layer for such purposes as providing protection against static or serving as an electrode which takes part in an image-forming process.
    Type: Grant
    Filed: March 18, 1993
    Date of Patent: August 23, 1994
    Assignee: Eastman Kodak Company
    Inventors: Charles C. Anderson, Mario D. DeLaura, Paul A. Christian, Ibrahim M. Shalhoub, David F. Jennings
  • Patent number: 5300418
    Abstract: The invention relates to a melt for the coating of a layer in a photographic element and which contains water, gelatin and an anionically charged, hydrophobic group containing compound that is (a) water soluble or soluble in a solution of 5 to 20 percent of water miscible organic solvent,said melt being further characterized by containing an amount of an amphiphilic compound which is sufficient to reduce the viscosity of said melt, said compound selected from the class consisting of:Type A: Sugar (saccharidic) compounds, characterized by having one to three hydrophobic groups, each group containing from about 6 to about 22 carbon atoms, and having one or more attached hydrophilic mono- or oligosaccharidic hydrophilic chains that may or may not be terminated by a negatively charged group such as a sulfate, sulfonate or a carboxyl group; andType B: Compounds compromising a hydrophobic group having from about 6 to about 22 carbon atoms and having one or two attached hydrophilic chains comprising at least 4 oxyet
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: April 5, 1994
    Assignee: Eastman Kodak Company
    Inventors: Gary W. Visconte, Pranab Bagchi, James A. Friday, Michael W. Orem, Alan R. Pitt
  • Patent number: 5284744
    Abstract: Silver halide emulsions can be prepared by precipitating the silver halide grains in the presence of a peptizer comprising a water-soluble starch, said peptizer exhibiting an absorbance of less than 1.0 in the wavelength region 200 to 400 nm when measured at a concentration of 2 g/L through a 1 cm transmission path. A useful water-soluble starch having this property is potato starch. Silver halide elements sensitive in the short ultraviolet spectral region can be prepared with these emulsions.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: February 8, 1994
    Assignee: Eastman Kodak Company
    Inventor: Joe E. Maskasky
  • Patent number: 5229246
    Abstract: A diffusion transfer photographic material is disclosed, which comprises a support having thereon at least a photosensitive element comprising a photosensitive silver halide emulsion and a diffusible dye donating compound, and a dye fixing element which is placed upon the said photosensitive element at the time of image transfer, wherein a natural macromolecular polysaccharide originating from red algae is included in said photosensitive element and/or in said dye fixing element, and a process of producing a diffusion transfer photographic material is disclosed, which comprises the step of using a coating liquid which contains a water soluble polymer solution comprising a natural macromolecular polysaccharide, a hydrophilic organic solvent in which the said water soluble polymer is essentially insoluble and water.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: July 20, 1993
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Takeshi Shibata, Takuya Yokokawa
  • Patent number: 5135844
    Abstract: The invention is generally accomplished by utilization of a surfactant for very small particle photographic dispersions. Three types of such surfactants that have been identified are as follows:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycedyl ether groups that may or may not be terminated with a negative charge such as a sulfate group.Type B--Block oligomeric surfactants comprising hydrophobic polyoxypropylene blocks (A) and hydrophilic polyoxyethylene blocks (B) joined in the manner of A--B--A, B--A--B, A--B, (A--B).sub.n .tbd.G.tbd.(B--A), or (B--A).sub.n .tbd.G.tbd.(A--B).sub.n, where G is a connective organic moiety and n is between 1 and 3.Type C--Sugar surfactants, comprising between one to three 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic mono or oligosaccharidic chains that may or may not be terminated by a negatively charged group such as a sulfate group.
    Type: Grant
    Filed: February 12, 1991
    Date of Patent: August 4, 1992
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, Gary J. McSweeney, Steven J. Sargeant
  • Patent number: 5019494
    Abstract: A silver halide photographic material which comprises a support having thereon at least one hydrophilic colloid layer, wherein the hydrophilic colloid layer comprises (a) a binder comprising a dextran having a molecular weight of at least 100,000 and (b) an ionic polymer.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: May 28, 1991
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Ichizo Toya, Ryoichi Nemori
  • Patent number: 5013640
    Abstract: The invention is generally accomplished by utilization of a surfactant for very small particle photographic dispersions. Three types of such surfactants that have been identified are as follows:Type A--Surfactant comprising 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic chains comprising at least 8 oxyethylene and/or glycedyl ether groups that may or may not be terminated with a negative charge such as a sulfate group.Type B--Block oligomeric surfactants comprising hydrophobic polyoxypropylene blocks (A) and hydrophilic polyoxyethylene blocks (B) joined in the manner of A-B-A, B-A-B, A-B, (A-B).sub.n .tbd.G.tbd.(B-A), or (B-A).sub.n .tbd.G.tbd.(A-B).sub.n, where G is a connective organic moiety and n is between 1 and 3.Type C--Sugar surfactants, comprising between one to three 6 to 22 carbon atom hydrophobic tail with one or more attached hydrophilic mono or oligosaccharidic chains that may or may not be terminated by a negatively charged group such as a sulfate group.
    Type: Grant
    Filed: June 15, 1989
    Date of Patent: May 7, 1991
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, Gary J. McSweeney, Steven J. Sargeant
  • Patent number: 4999282
    Abstract: An improved silver halide photographic material having at least one layer of a light-sensitive silver halide emulsion that is spectrally sensitized with a sensitizing dye of the following general formula (1) to light having a wavelength of 750 nm and above. Said silver halide emulsion is prepared by a process which comprises generating silver halide grains by adding a solution of a water-soluble silver salt and a solution of a water-soluble halide to a solution containing a protective colloid, aggregating the generated silver halide grains with a polymeric flocculating together with the protective colloid, and removing the dissolved matter; ##STR1## where Z.sub.1 and Z.sub.3 each represents the non-metallic atomic group necessary to form an optionally substituted benzothiazole, benzoxazole, naphthothiazole or naphthoxazole nucleus; R.sub.1 and R.sub.2 each represents a saturated or unsaturated aliphatic group; Z.sub.2 represents a 5- or 6-membered ring of carbon atoms; A represents a hydrogen atom when Z.sub.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: March 12, 1991
    Assignee: Konica Corporation
    Inventors: Kiyoshi Sato, Kouji Ono