Patents Represented by Attorney Robert A. Gerlach

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  • Cross-linked polymers from vinyl benzene sulfonate salts and ethylenic hydroxy monomers
    Patent number: 5096975
    Abstract: Cross-linked conductive polymer, coating compositions and light sensitive elements containing at least one antistat layer where the cross-linked polymer is a copolymer of a vinylbenzene sufonic acid and an ethylenically unsaturated monomer containing at least one primary hydroxyl group cross-linked with a methoxyalkylmelamine.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: March 17, 1992
    Assignee: Eastman Kodak Company
    Inventors: Charles C. Anderson, Raymond T. Jones
  • Print retaining coatings
    Patent number: 5075164
    Abstract: A photographic paper having a print retaining layer including a granular tooth providing ingredient in a binder polymer having a T.sub.g of 30.degree. to 65.degree. C. which is the addition product of from about 30 to about 98 mol percent of an alkylmethacrylate wherein the alkyl group has from 3 to 8 carbon atoms, from about 2 to about 10 mol percent of an alkali metal salt of a ethylenically unsaturated sulfonic or carboxylic acid, from 0 to about 65 mol percent of a vinyl benzene monomer and from 0 to about 5 mol percent of a crosslinking agent containing two ethylenically unsaturated bonds.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: December 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Wayne A. Bowman, Larry D. Hagemeier
  • Reduction of optical brightener migration in polyolefin coated paper bases
    Patent number: 5061610
    Abstract: In the preparation of a light sensitive photographic paper wherein the paper support contains a polyolefin coating the polyolefin is subjeced to two corona discahrge treatments, the first to prevent optical brightener from exuding from the polyolefin upon storage and the second after storage and before coating the next adjacent layer unto the polyolefin surface.
    Type: Grant
    Filed: October 22, 1990
    Date of Patent: October 29, 1991
    Assignee: Eastman Kodak Company
    Inventors: John F. Carroll, David A. Griggs, William A. Mruk
  • Recovery process for ethylene glycol and dimethylterephthalate
    Patent number: 5051528
    Abstract: A method of recovering ethylene glycol and dimethyl terephthalate from scrap polyethylene terephthalate resins by dissolving the scrap in oligomers of the same monomers and passing methanol through the solution.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: September 24, 1991
    Assignee: Eastman Kodak Company
    Inventors: Andrius A. Naujokas, Kevin M. Ryan
  • Dichloromethane abatement
    Patent number: 5035809
    Abstract: A method of treating dichloromethane laden streams to prevent discharge into the environment by contacting the laden stream with an aqueous solution of an alkali metal hydroxide and an alkylene ether glycol.
    Type: Grant
    Filed: October 5, 1990
    Date of Patent: July 30, 1991
    Assignee: Eastman Kodak Company
    Inventor: Arunas V. Kavaliunas
  • Film laminate
    Patent number: 5034263
    Abstract: A laminated film of a polyethylene terephthalate core and on at least one surface thereof an overcoat of a cyclohexylmethylene terephthalate polyester.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: July 23, 1991
    Assignee: Eastman Kodak Company
    Inventors: Larry K. Maier, Jong S. Lee
  • Fixing bath for black and white photographic elements
    Patent number: 5026629
    Abstract: A fixing bath and a method of fixing wherein the bath contains an imidazole compound that facilitates the removal of thiosulfate from the film in addition to reducing the presence of stain in the resulting film.
    Type: Grant
    Filed: February 7, 1990
    Date of Patent: June 25, 1991
    Assignee: Eastman Kodak Company
    Inventors: Hugh G. McGuckin, Michael G. Blount, Paul Schwartz, Donald F. McLaen, James L. Lyon
  • Method of preparing coupler dispersions for photographic use
    Patent number: 5024929
    Abstract: A method of preparing a coupler dispersion in gelatin by separating the auxiliary coupler solvent using a hydrophilic membrane having a pure size less than 175 Angstroms.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: June 18, 1991
    Assignee: Eastman Kodak Company
    Inventors: Edgar P. Lougheed, Carl B. Richenberg, Stephen P. Chen
  • Method for recovering metals from waste liquors
    Patent number: 5008017
    Abstract: Waste liquors containing small amounts of silver salts are treated with aluminum hydroxide to produce a floc reduced in volume by the addition of an acid and mixed with a metal bicarbonate and metal carbonate in amounts sufficient to affect solidification.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: April 16, 1991
    Assignee: Eastman Kodak Company
    Inventors: Gary G. Kiehl, Robert G. Surash
  • Treatment of domestic and industrial waste waters
    Patent number: 5008020
    Abstract: Waste waters are treated by mixing with a metal bicarbonate and a metal carbonate in amounts sufficient to affect solidification.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: April 16, 1991
    Assignee: Eastman Kodak Company
    Inventors: Robert G. Surash, Gary G. Kiehl
  • Anisotropic high energy magnets and a process of preparing the same
    Patent number: 5000796
    Abstract: A process of making anisotropic permanent magnets by extruding a rare earth magnetic alloy below the melting temperature of the alloy at an extrusion ratio of from 10:1 to 26:1.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: March 19, 1991
    Assignee: Eastman Kodak Company
    Inventor: Dilip K. Chatterjee
  • Photographic reflection print material with improved keeping properties
    Patent number: 4994147
    Abstract: A method of making a photographic paper support having improved raw stock keeping characteristics by an internal acid sizing step and an external alkaline sizing step to achieve a water extractable pH of from 6 to 9.5.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: February 19, 1991
    Assignee: Eastman Kodak Company
    Inventors: Francis J. Foley, Alberto M. Martinez, William A. Mruk
  • Cellulose ester-copolyester ether blends
    Patent number: 4992491
    Abstract: A blend of a cellulose and up to 5 percent by weight of a polyesterether resin and photographic film base having improved tear strength prepared from the blend.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: February 12, 1991
    Assignee: Eastman Kodak Company
    Inventor: John E. Rieth
  • Magnetic dispersion
    Patent number: 4990276
    Abstract: A dispersion consisting essentially of magnetic particles, a dialkylester of phthalic acid which functions as a dispersing medium, and optionally, a dispersing agent is particularly useful as a precursor to a composition suitable for casting onto a cellulose acid ester support film to form a transparent magnetic recording layer for use in photographic films. The dispersion provides magnetic recording layers exhibiting fewer particle agglomerations and reduced light scattering and photographic prints prepared from films containing such magnetic layers exhibit virtually no increase in graininess attributable to the magnetic recording layer.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: February 5, 1991
    Assignee: Eastman Kodak Company
    Inventors: John F. Bishop, Robert O. James, Diane E. Kestner
  • Method of making anisotropic magnets
    Patent number: 4985085
    Abstract: A process making anisotropic permanent magnets by extruding a neodymium-iron-boron alloy having a grain size of from 500.ANG. to 2000.ANG.at a temperature less than the melting temperature of the alloy at an extrusion ratio of from 10:1 to 26:1.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: January 15, 1991
    Assignee: Eastman Kodak Company
    Inventor: Dilip K. Chatterjee
  • Neodymium iron boron magnets in a hot consolidation process of making the same
    Patent number: 4950450
    Abstract: A method of making high energy Nd-Fe-B magnets having a mass less than 30 grams wherein an alloy of said materials having a grain size less than that desired in the finished magnet is first prepared and subsequently hot worked to the desired configuration with increased magnetic properties and density by introducing into a cavity formed by a die and punch a Nd-Fe-B alloy powder having a particle size of from 45 .mu.m to 250 .mu.m and a grain size of from 100 to 1500 angstroms, compressing the powder at a temperature of from about 550.degree. C. to 750.degree. C. under a die-punch pressure of at least 10 kpsi under a vacuum of less than 200 millitorr to achieve a permanent magnet having a remanence of at least 7 kilogauss.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: August 21, 1990
    Assignee: Eastman Kodak Company
    Inventors: Dilip K. Chatterjee, Thomas W. Martin, Paul D. Askins
  • Method of magnetizing high energy rare earth alloy magnets
    Patent number: 4920326
    Abstract: A method of magnetizing high energy rare earth alloy magnets by applying a magnetic field while heating the magnetic alloy.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: April 24, 1990
    Assignee: Eastman Kodak Company
    Inventor: Ashok K. Agarwala
  • High purity sputtering target material and method for preparing high purity sputtering target materials
    Patent number: 4895592
    Abstract: Sputtering targets and a method for preparing them by melting the components of a rare earth-transition metal alloy in an inert atmosphere in the inner section of a crucible assembly having inner and outer sections separating by thermally insulating material and cooling the melt in the inner section.
    Type: Grant
    Filed: December 14, 1987
    Date of Patent: January 23, 1990
    Assignee: Eastman Kodak Company
    Inventors: Tukaram K. Hatwar, Paul D. Askins
  • Method of preparing thermo-magneto-optic recording elements
    Patent number: 4892634
    Abstract: A method of making a thermo-magneto-optic element stable over wide temperature ranges wherein a barrier layer is applied to a polymeric substrate, the substrate is first exposed to an RF oxygen plasma treatment at a power of from about 50 to about 200 watts and a time of from about 5 to about 200 seconds.
    Type: Grant
    Filed: October 3, 1988
    Date of Patent: January 9, 1990
    Assignee: Eastman Kodak Company
    Inventors: David A. Glocker, Geoffrey C. Lesh
  • Method of making fully dense anisotropic high energy magnets
    Patent number: 4892596
    Abstract: A method of making anisotropic permanent magnets by extruding a rare earth magnetic alloy together with an oxygen-getter material at a temperature below the melting point of the alloy at an extrusion ratio of from 10:1 to 26:1.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: January 9, 1990
    Assignee: Eastman Kodak Company
    Inventor: Dilip K. Chatterjee