Patents Represented by Attorney Carl O. Thomas

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  • Photographically useful chalcogenazoles, chalcogenazolines, and chalcogenazolinium and chalcogenazolium salts
    Patent number: 4874866
    Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivatives compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addenda in silver halide photographic systems.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: October 17, 1989
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
  • Unitary intensifying screen and radiographic element
    Patent number: 4865944
    Abstract: A unitary intensifying screen and radiographic element are disclosed comprised of adjacently coated silver halide emulsion and X radiation absorbing fluorescent layers. The fluorescent layer (a) is capable of attenuating at least 5 percent of a reference X radiation exposure produced by a Mo target tube operated at 28 kVp with a three phase power supply, wherein the reference X radiation exposure passes through 0.03 mm of Mo and 4.5 cm of poly(methyl methacrylate) to reach the fluorescent layer mounted 25 cm from a Mo anode of the target tube and attenuation is measured 50 cm beyond the fluorescent layer, (b) contains a phosphor which exhibits a conversion efficiency at least equal to that of calcium tungstate, (c) exhibits modulation transfer factors greater than those of reference curve A in FIG. 3, and (d) exhibits an optical density of less than 1.0.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: September 12, 1989
    Assignee: Eastman Kodak Company
    Inventors: Luther C. Roberts, William E. Moore, James R. Buntaine, Robert V. Brady
  • Blended emulsions exhibiting improved speed-granularity relationship
    Patent number: 4865964
    Abstract: Siliver halide photographic elements are disclosed comprised of blended emulsions. An improved relationship between speed and granularity can be realized when a blended silver bromide or bromoiodide emulsion is comprised of a high aspect ratio tabular grain emulsion containing at least one spectral sensitizing dye and a low aspect ratio grain emulsion.
    Type: Grant
    Filed: March 25, 1988
    Date of Patent: September 12, 1989
    Assignee: Eastman Kodak Company
    Inventor: Robert J. Newmiller
  • Dye sensitized photographic imaging system
    Patent number: 4859572
    Abstract: A photographic imaging system is disclosed comprised of a hardenable organic component containing ethylenic unsaturation sites and an initiator system for ethylenic addition. The initiator system is comprised of an electron acceptor activator, an electron donor activator, and, acting as a photosensitizer, a dye capable of absorbing imaging radiation. The dye has a reduction potential related to that of the electron acceptor activator and an oxidation potential related to that of the electron donor activator to permit each to release a free radical upon excitation of the photosensitizer by exposure to actinic radiation.
    Type: Grant
    Filed: May 2, 1988
    Date of Patent: August 22, 1989
    Assignee: Eastman Kodak Company
    Inventors: Samir Y. Farid, Roger E. Moody
  • Novel polymethine dyes and imaging compositions
    Patent number: 4855213
    Abstract: Polymethine dyes are disclosed containing an acidic electron accepting terminal nucleus comprised of an isocyano group. The dyes are useful as spectral sensitizers in ultravioilet responsive imaging compositions.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: August 8, 1989
    Assignee: Eastman Kodak Company
    Inventor: Margaret E. Logan
  • Novel polymethine dyes and UV absorbers containing a triarylborylisocyano group and imaging compositions containing these dyes
    Patent number: 4839274
    Abstract: Polymethine dyes and ultraviolet absorbers are disclosed containing a basic electron donating terminal nucleus and an acidic electron accepting terminal nucleus comprised of a triarylborylisocyano group. The dyes are useful in imaging materials.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: June 13, 1989
    Assignee: Eastman Kodak Company
    Inventor: Margaret E. Logan
  • Novel polymethine dyes and UV absorbers and imaging materials for their use
    Patent number: 4839260
    Abstract: Polymethine dyes and ultraviolet absorbers are disclosed containing a basic electron donating terminal nucleus and an acidic electron accepting terminal nucleus satisfying the formula: ##STR1## where Ar is independently in each occurrence an aromatic group andD is an oxy or amino group.These polymethines are useful in imaging materials.
    Type: Grant
    Filed: June 30, 1987
    Date of Patent: June 13, 1989
    Assignee: Eastman Kodak Company
    Inventor: Margaret E. Logan
  • Internally doped silver halide emulsions
    Patent number: 4835093
    Abstract: A photographic silver halide emulsion is disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure and internally containing rhenium ions.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: May 30, 1989
    Assignee: Eastman Kodak Company
    Inventors: Gaile A. Janusonis, Ralph W. Jones, James R. Buntaine, Myra T. Olm, Raymond S. Eachus
  • Process for depositing a III-V compound layer on a substrate
    Patent number: 4833103
    Abstract: A process comprising applying to a substrate a thin film comprised of a liquid carrier and a precursor selected from among compounds in which one or more pairs of group III and V elements are each joined by a thermally stable bond and the group III and V elements are each substituted with two thermally volatilizable ligands. The precursor is heated to a temperature in excess of 200.degree. C. to remove its volatilizable ligands while leaving a ligand free III-V compound as a monophasic layer on the substrate.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: May 23, 1989
    Assignee: Eastman Kodak Company
    Inventors: John A. Agostinelli, Henry J. Gysling
  • Oxatellurazolium and oxatellurazinium compounds
    Patent number: 4831136
    Abstract: Compounds containing an aromatic ring portion fused with a tellurazolium or derivative tellurazole, tellurazoline (including tellurazolinylidene), or tellurazolinium ring portion are disclosed together with processes and intermediates for their preparation. With properly selected pendant groups these tellurazolium and derivative compounds can be usefully employed as dyes, antifoggants or stabilizers, nucleating agents, latent image keeping addenda, or speed or contrast altering addends in silver halide photographic systems.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: May 16, 1989
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Ronald E. Leone, Rosemary Przyklek
  • Langmuir-Blodgett film assembly
    Patent number: 4830952
    Abstract: An article is disclosed containing a Langmuir-Blodgett film assembly comprised of at least one oriented polymer layer of monomolecular thickness containing repeating units comprised of a hydrophilic group linking two hydrophobic groups each containing at least two crosslinking moieties.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: May 16, 1989
    Assignee: Eastman Kodak Company
    Inventors: Thomas L. Penner, John M. Noonan, Ignazio S. Ponticello
  • Photographic element and patternable mordant composition
    Patent number: 4808510
    Abstract: A photographically negative-working patternable mordant composition is disclosed containing a photocrosslinkable polymer comprised of, for providing both mordanting and crosslinking sites, repeating units of the formula: ##STR1## wherein Ar is an aromatic linking group,R is a methylene group,R.sup.1 is independently in each occurrence a lower alkyl group,R.sup.2 is a divalent linking group,X is a photocrosslinking group, andZ is a charge balancing counter ion.The mordant composition can be coated on a support to form a photographic element.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: February 28, 1989
    Assignee: Eastman Kodak Company
    Inventors: Robert A. Snow, Hugh G. McGuckin, Ignazio S. Ponticello, Robert C. Daly, Laurel J. Pace, Sandra K. Fischer, Michael J. Hanrahan
  • Radiographic element exhibiting reduced crossover
    Patent number: 4803150
    Abstract: A double coated radiographic element is disclosed comprised of a dye coated between an emulsion layer and a support to reduce crossover to less than 10 percent. The dye is present in the form of microcrystalline particles, yet is capable of being decolorized in less than 90 seconds during processing.
    Type: Grant
    Filed: July 13, 1987
    Date of Patent: February 7, 1989
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, James E. Kelly, Donald R. Diehl, Ronda E. Factor
  • Optical article containing a polymeric matrix exhibiting a high level of second order polarization susceptibility
    Patent number: 4796971
    Abstract: An optical article is disclosed containing, for the transmission of electromagnetic radiation, a medium exhibiting a second order polarization susceptibility greater than 10.sup.-9 electrostatic units comprised of organic polar aligned noncentrosymmetric molecular dipoles. The molecular dipoles form repeating units in a crosslinked polymeric matrix.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: January 10, 1989
    Assignee: Eastman Kodak Company
    Inventors: Douglas R. Robello, Abraham Ulman, Craig S. Willand
  • Optical article exhibiting a high level of second order polarization susceptibility
    Patent number: 4792208
    Abstract: An optical article is disclosed containing, for the transmission of electromagnetic radiation, a medium exhibiting a second order polarization susceptibility greater than 10.sup.-9 electrostatic units comprised of polar aligned noncentrosymmetric molecular dipoles. The molecular dipoles have an electron donor moiety linked through a conjugated .pi. bonding system to an electron acceptor sulfonyl moiety.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: December 20, 1988
    Assignee: Eastman Kodak Company
    Inventors: Abraham Ulman, David J. Williams, Thomas L. Penner, Douglas R. Robello, Jay S. Schildkraut, Michael Scozzafava, Craig S. Willand
  • Process for forming a positive index waveguide
    Patent number: 4788159
    Abstract: A process of preparing a laterally confined positive index waveguide is disclosed in which a monocrystalline substrate comprised of a III-V compound is provided having adjacent one major surface monocrystalline gallium aluminum arsenide having a resistivity greater than 10.sup.5 ohm-cm. A protective layer is provided on the substrate, and a channel is opened in the substrate to expose an unprotected portion of the substrate. A waveguide region is formed by selectively depositing epitaxially on only the unprotected portion of the substrate at least one III-V compound of a higher refractive index than the substrate monocrystalline gallium aluminum arsenide. Epitaxial deposition is terminated when the waveguide region forms with the one major surface an overall planar surface, and at least on layer bridging the substrate and the waveguide region is deposited on the planar surface.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: November 29, 1988
    Assignee: Eastman Kodak Company
    Inventor: Frank T. J. Smith
  • Time of flight mass spectrometer
    Patent number: 4774408
    Abstract: A time of flight mass spectrometer is disclosed comprised of a deflection field for ion parcels including at least one pair of inner and outer electrodes. The inner and outer electrodes present ion guiding surfaces which in planes normal to the ion flight path are convex and concave, respectively, and more closely spaced at their edges than at any mediate location.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: September 27, 1988
    Assignee: Eastman Kodak Company
    Inventor: Roland S. Gohlke
  • Isotelluroazolo[1,5-a]tellurazoles and processes for their preparation
    Patent number: 4772715
    Abstract: Isotellurazolo[1,5-a]tellurazoles are disclosed. These heterocycles can be prepared by reacting a diarylformamidine with an aromatic tellurazolium salt which is substituted at its 2 ring position with a methine group precursor. The product heterocycles are useful directly for their blue light absorption and in forming stable heterocyclic nuclei containing compounds, such as a photographic addenda.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: September 20, 1988
    Assignee: Eastman Kodak Company
    Inventors: Wolfgang H. H. Gunther, Rosemary Przyklek-Elling
  • Electroluminescent device with modified thin film luminescent zone
    Patent number: 4769292
    Abstract: An electroluminescent device is disclosed having a luminescent zone of less than one .mu.m in thickness comprised of an organic host material capable of sustaining hole-electron recombination and a fluorescent material capable of emitting light in response to energy released by hole-electron recombination.
    Type: Grant
    Filed: October 14, 1987
    Date of Patent: September 6, 1988
    Assignee: Eastman Kodak Company
    Inventors: Ching W. Tang, Chin H. Chen, Ramanuj Goswami
  • Color filter arrays
    Patent number: 4764670
    Abstract: A color filter array is disclosed comprised of red, green, and blue filters forming an interlaid pattern. Each of the red, green, and blue filters is formed of two superimposed filter layers, each made up of a different subtractive primary dye. Layers of controlled thickness containing a single dye permit precise control of filter density and hue. The color filter array can form part of a viewable display unit or form part of an image sensor.
    Type: Grant
    Filed: September 1, 1987
    Date of Patent: August 16, 1988
    Assignee: Eastman Kodak Company
    Inventors: Laurel J. Pace, Jeffrey C. Blood