Patents Represented by Attorney John R. Everett
  • Patent number: 6797183
    Abstract: This invention provides a method of treating waste effluent, particularly photographic effluent, containing reduced species such as thiosulphate or sulphite, by oxidation with hydrogen peroxide or a compound capable of releasing hydrogen peroxide, in the presence of a catalyst therefor. The invention is characterized in that the catalyst is immobilized on a substrate. The catalyst may be selected from chromate, vanadate and preferable molybdate or tungstate and the substrate may comprise an ion exchange material, especially an anion exchange material. The invention further provides a holding tank apparatus (10) or a conduit apparatus (20) for carrying out this method. The invention is particularly appropriate for use with fixer from redox-amplification processes.
    Type: Grant
    Filed: February 4, 1997
    Date of Patent: September 28, 2004
    Assignee: Eastman Kodak Company
    Inventor: John R. Fyson
  • Patent number: 6582881
    Abstract: An optical recording element having a transparent substrate and on the surface of said substrate, a recording layer, a light reflecting layer is disclosed. The recording layer comprises (i) a metallized azo ether dye having an azo group linking a substituted 3-hydroxypyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an ether substituent ortho to the azo group and said phenyl nucleus is free of strong electron withdrawing groups and (ii) a cyanine dye. The recording layer also has, when unrecorded a refractive index, at a selected wavelength from 400 to 660 nm, comprising a real part (n) greater than 1.8 and an imaginary part (k) less than 0.2.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: June 24, 2003
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Ann L. Carroll-Lee, Csaba A. Kovacs
  • Patent number: 6447981
    Abstract: Metallized azo thioether dyes having an azo group linking a substituted 3-hydroxypyridine nucleus to a phenyl nucleus are disclosed. The phenyl nucleus has an thioether substituent ortho to the azo group but does not have electron withdrawing substituents on the phenyl nucleus. The dyes are useful in optical recording elements.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: September 10, 2002
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Csaba A. Kovacs
  • Patent number: 6361922
    Abstract: The present invention discloses optical recording elements having optical recording layers containing tetra dyes. The dyes have metallized azo dianionic dye with cationic dye counterions. The recording layer has a thickness from 225 to 300 nm.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: March 26, 2002
    Assignee: Eastman Kodak Company
    Inventors: Derek David Chapman, James C. Fleming, Ramanuj Goswami, Csaba Andras Kovacs
  • Patent number: 6270943
    Abstract: Metallized azo ether dyes having an azo group linking a substituted 3-hydroxypyridine nucleus to a phenyl nucleus are disclosed. The phenyl nucleus has an ether substituent ortho to the azo group. The phenyl nucleus is free of strong electron withdrawing substituents. The dyes are useful in optical recording elements.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: August 7, 2001
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Ann L. Carroll-Lee, Csaba A. Kovacs
  • Patent number: 6165683
    Abstract: A metallized azo-ether dye comprising an azo group linking a substituted 3-hydroxy-pyridine nucleus to a phenyl nucleus wherein the phenyl nucleus has an alkoxy or thioether substituent at its 2-position. The dye is useful in the recording layers of optical recording elements.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: December 26, 2000
    Assignee: Eastman Kodak Company
    Inventors: Derek D. Chapman, Ramanuj Goswami, Csaba Andras Kovacs
  • Patent number: 6074756
    Abstract: In accordance with the invention, a toner transfer member for electrostatography comprises a substrate and an outer surface layer comprising a material selected from the group consisting of a ceramer comprising a polyurethane silicate hybrid organic-inorganic network and a fluoropolymeric composition comprising a polyester-based polyurethane and polytetrafluoroethylene. The transfer member of the present invention is particularly useful for duplex electrostatographic copying processes; its outer surface layer substantially reduces the migration of release oil from the fusing station to the photoconductor via the transfer member, thereby ensuring high quality fused images on both sides of a receiver sheet.
    Type: Grant
    Filed: April 25, 1997
    Date of Patent: June 13, 2000
    Assignee: Eastman Kodak Company
    Inventors: William B. Vreeland, David E. Hockey
  • Patent number: 6027847
    Abstract: A poly(vinylbenzyl quaternary phosphonium) salt having the following general structure: M represents Fe or Zn;X represents F, Cl, Br or I;p is 3 when M represents Zn and p is 4 when M represents Fe;ortho, meta and para isomers of the vinyl benzyl moiety are included;R.sup.1, R.sup.2 and R.sup.3 represent hydrogen; alkyl having from 1 to 24 carbon atoms; hydroxy-; carboxy-; alkoxy-; carboalkoxy; acyloxy-; amino-; nitro-; cyano-; keto-; or halo-; and R.sup.1, R.sup.2 and R.sup.3 may be independently substituted in the ortho, meta or para positions. R.sup.1, R.sup.2 and R.sup.3 may represent more than one substituent per ring;.brket open-st.Z.brket close-st.
    Type: Grant
    Filed: June 11, 1998
    Date of Patent: February 22, 2000
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Dinesh Tyagi
  • Patent number: 5985017
    Abstract: An ink jet printing method is described. It comprising the steps of: providing an ink jet printer that is responsive to digital data signals; loading the printer with ink receptive substrates; loading the printer with an aqueous ink jet ink, said ink A) comprising a pigment, an aqueous carrier and potassium N-methyl-N-oleoyl taurate; and B) having a surface tension of 20 to 60 dynes/cm at 25.degree. C., a viscosity of 1 to 10 centipoise at 25.degree. C. and a particle size of less than 1.0 .mu.m; and printing on the ink receptive substrate in response to the digital data signals.
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: November 16, 1999
    Assignee: Eastman Kodak Company
    Inventors: Douglas E. Bugner, Alexandra D. Bermel, William Gruenbaum
  • Patent number: 5976753
    Abstract: Electrostatographic toners and developers are disclosed. They contain poly [(2-cyanoacetamido)phenyl acrylate] charge control agents.
    Type: Grant
    Filed: October 1, 1998
    Date of Patent: November 2, 1999
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Robert D. Fields
  • Patent number: 5972831
    Abstract: The present invention concerns a novel photocatalytic composition, a photocatalytic element and a novel method for the photocatalytic treatment of effluents, comprising a gaseous or aqueous solution of the organic compounds to be destroyed.This novel photocatalytic composition consists of an inorganic gel comprising a photocatalyst and an aluminosilicate inorganic polymer binder of the Imogolite type.This composition destroys organic compounds efficaciously.
    Type: Grant
    Filed: June 12, 1997
    Date of Patent: October 26, 1999
    Assignee: Eastman Kodak Company
    Inventors: Olivier J. Poncelet, Danielle M. Wettling
  • Patent number: 5972576
    Abstract: The invention concerns a method for decontaminating a used photographic processing bath.This method consists of putting the processing bath in contact with a heat-reversible hydrophilic polymer which becomes hydrophobic above a temperature lower than the temperature of the processing bath.The tars and other organic contaminants present in the used photographic processing bath can be removed by cooling the heat-reversible polymer below the temperature where it becomes hydrophilic.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: October 26, 1999
    Assignee: Eastman Kodak Company
    Inventors: Olivier J. Poncelet, Danielle M. Wettling, Jeannine Rigola
  • Patent number: 5961939
    Abstract: There is provided a method for removing silver from photoprocessing solutions containing hardening agents which comprises:a) adding a chelating agent to the photoprocessing solution in an amount sufficient to inhibit the precipitation of the high valent cations of the hardening agents;b) adding a base to adjust the pH of the photoprocessing solution to a value above 5.5; andc) adding a chemical precipitant for the silver contained in the photoprocessing solution;and optionally adding as a final component a flocculating agent which causes the precipitate to grow in size.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: October 5, 1999
    Assignee: Eastman Kodak Company
    Inventors: James R. Kulp, Charles S. Christ, Jr., Jay E. Mathewson
  • Patent number: 5959960
    Abstract: A method of coating an optical recording layer on a transparent grooved substrate is disclosed. The recording layer is coated from a mixture of a primary and a secondary solvent. The solvent mixture provides a wide range of conformalities for optical recording layers.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: September 28, 1999
    Assignee: Eastman Kodak Company
    Inventors: Susan Starr Collier, Michael Paul Cunningham, Csaba Andras Kovacs
  • Patent number: 5948372
    Abstract: A device for destroying by electro-oxidation a photographic solution having at least one photographic developer. The device comprises a) an electro-oxidation unit adapted to degrade the photographic developer into volatile organic compounds and to produce hydrogen and oxygen, b) an expansion reservoir designed to contain the gaseous mixture generated by said electro-oxidation unit; and c) a combustion unit supplied with the gaseous mixture from the expansion reservoir.
    Type: Grant
    Filed: June 11, 1996
    Date of Patent: September 7, 1999
    Assignee: Eastman Kodak Company
    Inventor: Philippe Gerald Robert
  • Patent number: 5945003
    Abstract: The present invention concerns a method for the depollution of photographic effluents. The method of the invention comprises the step of forming in situ in the effluent an adsorbent of the hydrotalcite type. This method is useful for the elimination of silver and iron in photographic effluents.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: August 31, 1999
    Assignee: Eastman Kodak Company
    Inventor: Philippe Strauel
  • Patent number: 5932690
    Abstract: The present invention discloses an optical recording element having, in the following order, a transparent substrate, a recording layer and a light reflecting layer wherein the recording layer(A) has a real refractive index (N) at 780 nm not less than 1.8 and an imaginary part (k) is not greater than 0.15;(B) comprises a polymeric cyanine dye that (i) has both a weight-average molecular weight greater than 50,000 and a glass transition temperature (Tg) of less than 150.degree. C.; or (ii) has either (a) a weight-average molecular weight greater than 50,000 or (b) a glass transition temperature (Tg) of less than 150.degree. C.; and(C) a thickness greater than 200 nm.
    Type: Grant
    Filed: April 2, 1997
    Date of Patent: August 3, 1999
    Assignee: Eastman Kodak Company
    Inventors: Elizabeth G. Burns, James C. Fleming
  • Patent number: 5932183
    Abstract: A biocidal material comprises an organic biocide immobilised on a polymeric support characterised in that the support is water-insoluble and the biocide is covalently bound to the support by a hydrolytically stable covalent linkage. The material can be used for inhibiting bacterial growth in an aqueous medium e.g. the wash water of a photoprocessing system. The material can be housed in a flow-through container.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: August 3, 1999
    Assignee: Eastman Kodak Company
    Inventors: Gregory Nigel Batts, Karen Leeming, Christoper Peter Moore
  • Patent number: 5922429
    Abstract: An optical recording element is disclosed. The element has a transparent substrate and on the surface of said substrate, a recording layer and a light reflecting layer wherein recording layer comprises a mixture of a metallized formazan dye and cyanine dye and the unrecorded layer is such that the real part of the refractive (n) at 780 nm is greater than 1.8 and the imaginary part (k) is less than 0.15. The metallized formazan dye has a k value of 0.03 to 0.07.
    Type: Grant
    Filed: October 16, 1996
    Date of Patent: July 13, 1999
    Assignee: Eastman Kodak Company
    Inventors: Derek David Chapman, Michael Paul Cunningham, Ramanuj Goswami
  • Patent number: 5922822
    Abstract: (2-(Sulfonamidomethylene)-2-cyanoacetamido)phenyl acrylate compounds and polymers are disclosed. The polymers are useful charge-control agents in electrostatographic toners and developers.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: July 13, 1999
    Assignee: Eastman Kodak Company
    Inventors: John C. Wilson, Robert D. Fields