Patents Represented by Attorney Carl O. Thomas

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  • Photographic emulsions containing internally modified silver halide grains
    Patent number: 4981781
    Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing oxo coordination ligands and a transition metal chosen from groups 6, 7, and 8 of the periodic table of elements.
    Type: Grant
    Filed: August 28, 1989
    Date of Patent: January 1, 1991
    Assignee: Eastman Kodak Company
    Inventors: Woodrow G. McDugle, John E. Keevert, Alfred P. Marchetti
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing scandium
    Patent number: 4980560
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing scandium ions or scandium ions in combination with neodymium ions. Scandium increases speed while reducing afterglow while the further addition of neodymium allows afterglow to be eliminated. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: December 25, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phospher containing europium to reduce afterglow
    Patent number: 4980559
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing europium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 15, 1989
    Date of Patent: December 25, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick W. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing lutetium to reduce afterglow
    Patent number: 4975588
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing lutetium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: December 4, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • Benzofuran dyes containing a coumarin nucleus
    Patent number: 4973694
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathocromically shifted absorption peaks.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: November 27, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing erbium to reduce afterglow
    Patent number: 4972086
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing erbium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: November 20, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphur containing holmium to reduce afterglow
    Patent number: 4972516
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing holmium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: November 20, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • Optical article for reflection modulation
    Patent number: 4971426
    Abstract: An optical article is disclosed capable of modulating the reflection of electromagnetic radiation containing a reflective metal layer having a thickness of less than 0.5 .mu.m, an optical coupler for directing polarized electromagnetic radiation to the reflective metal layer and serving as a support for the device, a first dielectric layer interposed between the reflective metal layer and the support having a thickness in the range of from 0.1 to 10 times the wavelength of the electromagnetic radiation, a second dielectric layer adjacent the reflective metal layer exhibiting a refractive index which differs from that of the first dielectric layer by less than 20 percent and can adjusted by an applied electrical potential gradient, and means for variably applying an electrical potential to a surface of the second dielectric layer remote from the reflective metal layer.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: November 20, 1990
    Assignee: Eastman Kodak Company
    Inventors: Jay S. Schildkraut, Christopher B. Rider, Michael Scozzafava
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing ytterbium to reduce afterglow
    Patent number: 4967087
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing ytterbium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 30, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing neodymium to reduce afterglow
    Patent number: 4967085
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing neodymium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 30, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing gadolinium to reduce afterglow
    Patent number: 4963753
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing gadolinium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 16, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing thulium to reduce afterglow
    Patent number: 4963754
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing thulium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 16, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • X-ray intensifying screen including a titanium activated hafnium dioxide phosphor containing samarium to reduce afterglow
    Patent number: 4961004
    Abstract: An intensifying screen is disclosed containing a phosphor composition comprised of monoclinic crystals of a titanium activated hafnia phosphor host containing samarium ions to reduce afterglow. A phosphor composition in which zirconia is at least partially substituted for hafnia is also disclosed.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: October 2, 1990
    Assignee: Eastman Kodak Company
    Inventors: Philip S. Bryan, Patrick M. Lambert, Christine M. Towers, Gregory S. Jarrold
  • Nonlinear optical article with improved buffer layer
    Patent number: 4955977
    Abstract: An optical article for the propagation of electromagnetic radiation is disclosed comprised of an electrically conductive support on which a poled polymeric film exhibiting a glass transition temperature of at least 80.degree. C. and a second order polarization susceptibility greater than 10.sup.-9 electrostatic units is formed. A layer for enhancing the transmission of electromagnetic radiation is interposed between the electrically conductive support and the poled polymeric film. The transmission enhancement layer is an amorphous layer of at least 0.5 .mu.m in thickness having a refractive index less than that of the polymeric film and a resistance less than 10 times that of the polymeric film. The transmission enhancement layer being comprised of a mixture of (a) at least one metal oxide or fluoride and (b) a low molecular weight aromatic compound.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: September 11, 1990
    Assignee: Eastman Kodak Company
    Inventors: Phat T. Dao, Michael Scozzafava, Jay S. Schildkraut, Christopher B. Rider
  • Conductive articles and processes for their preparation
    Patent number: 4956335
    Abstract: A patterned crystalline superconducting layer is formed by first providing a copper oxide lift-off layer under an amorphous metal oxide superconducing precursor layer and then photolithographically forming a pattern in the layers. The patterned layers are then heat treated to form the final crystalline superconducting layer.
    Type: Grant
    Filed: June 20, 1988
    Date of Patent: September 11, 1990
    Assignee: Eastman Kodak Company
    Inventors: John A. Agostinelli, Gerrit Lubberts
  • Metalorganic deposition process for preparing heavy pnictide superconducting oxide films
    Patent number: 4950643
    Abstract: A metalorganic deposition method is disclosed for manufacturing a heavy pnictide superconducting oxide film on a substrate, in which a mixed metalorganic precursor is coated and heated to its thermal decomposition temperature to create an amorphous mixed metal oxide layer. The amorphous layer is then converted to a crystalline coating by further heating followed by cooling in the presence of oxygen.
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: August 21, 1990
    Assignee: Eastman Kodak Company
    Inventors: John A. Agostinelli, Gustavo R. Paz-Pujalt, Arun K. Mehrotra, Liang-Sun Hung
  • Novel benzofuran dyes
    Patent number: 4948893
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.
    Type: Grant
    Filed: August 17, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Benzofuran dyes
    Patent number: 4948895
    Abstract: A 6-tertiary amino-2-(Z.dbd.CH--)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.
    Type: Grant
    Filed: October 13, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Nonlinear optical article for modulating polarized light
    Patent number: 4948225
    Abstract: A nonlinear optical article for the controlled propagation of electromagnetic radiation is disclosed. The article includes a reflective metal layer having a thickness in the range of from 100 to 1000 .ANG. and work function in the range of from 2.5 to 4.5 eV, an optical coupler, a dielectric medium comprised of a poled polymeric layer exhibiting a glass transition temperature of at least 50.degree. C. and a second order polarization susceptibility greater than 10.sup.-9 electrostatic units, and means for variably applying an electrical potential to a surface of the dielectric medium remote from the reflective metal layer. A protective metal fluoride or oxide layer having a thickness of less than 0.1 .mu.m is interposed between the reflective metal layer and the poled polymeric layer.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: August 14, 1990
    Assignee: Eastman Kodak Company
    Inventors: Christopher B. Rider, Michael Scozzafava, Jay S. Schildkraut
  • Nonlinear optical waveguide device
    Patent number: 4946235
    Abstract: An optical article is disclosed containing contiguously overlying an organic layer for the nonlinear propagation of electromagnetic radiation an amorphous transmission enhancement layer of at least 0.5 .mu.m in thickness transmissive to the nonlinearly propagated electromagnetic radiation, exhibiting a refractive index less than that of the organic layer, and comprised of a low molecular weight aromatic compound.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: August 7, 1990
    Assignee: Eastman Kodak Company
    Inventors: Michael Scozzafava, Phat T. Dao, Douglas R. Robello, Jay S. Schildkraut, Craig S. Willand, David J. Williams