Patents Represented by Attorney Carl O. Thomas

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  • Photographic emulsions containing internally modified silver halide grains
    Patent number: 4945035
    Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains containing greater than 50 mole percent chloride and less than 5 mole percent iodide, based on total silver, with any residual halide being bromide, said grains exhibiting a face centered cubic crystal lattice structure formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands. The emulsions exhibit increased sensitivity.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: July 31, 1990
    Assignee: Eastman Kodak Company
    Inventors: John E. Keevert, Jr., Woodrow G. McDugle, Raymond S. Eachus
  • Modified peptizer twinned grain silver halide emulsions and processes for their preparation
    Patent number: 4942120
    Abstract: The present invention is directed to a process of precipitating for use in photography a silver halide emulsion employing a gelatino-peptizer containing alkylated methionine and to an emulsion produced by this process. A variety of advantages can be realized, including an increase in the population of twinned grains and a higher yield of thin tabular grains.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: July 17, 1990
    Assignee: Eastman Kodak Company
    Inventors: Scott A. King, Philip I. Rose, Joe E. Maskasky
  • Photographic emulsions containing internally modified silver halide grains
    Patent number: 4937180
    Abstract: Photographic emulsions are disclosed comprised of radiation sensitive silver bromide grains optionally containing iodide. The grains exhibit a face centered cubic crystal lattice structure and are formed in the presence of a hexacoordination complex of rhenium, ruthenium, or osmium with at least four cyanide ligands.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: June 26, 1990
    Assignee: Eastman Kodak Company
    Inventors: Alfred P. Marchetti, Woodrow G. McDugle, Raymond S. Eachus
  • Photographic emulsions containing internally modified silver halide grains
    Patent number: 4933272
    Abstract: Photographic silver halide emulsions are disclosed comprised of radiation sensitive silver halide grains exhibiting a face centered cubic crystal lattice structure internally containing a nitrosyl or thionitrosyl coordination ligand and a transition metal chosen from groups 5 to 10 inclusive of the periodic table of elements.
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: June 12, 1990
    Assignee: Eastman Kodak Company
    Inventors: Woodrow G McDugle, Anthony D. Gingello, John A. Haefner, John E. Keevert, Jr., Alfred P. Marchetti
  • Method of improving yield of LED arrays
    Patent number: 4927778
    Abstract: A high yield method for the fabrication of multi-element, gallium-arsenide-phosphide light emitting diode arrays having square light emitting elements 7903 square microns on 88.9 micron center suitable for use in electronic/optical printers, is described. The resulting arrays at a current density of 200 A/cm.sup.2 have 0.6% power efficiency and a radiant exitance of 3.8 W cm -2 with less than 2% standard deviation in element to element radiant exitance. The integrated, relatively low cost LED arrays, are particularly suitable for use in electronic/optical printing applications.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: May 22, 1990
    Assignee: Eastman Kodak Company
    Inventor: Daniel C. Abbas
  • Nucleation of tabular grain emulsions at high pBr
    Patent number: 4914014
    Abstract: The present invention is directed to a process of precipitating for use in photography a thin tabular grain silver bromide or bromoiodide emulsion within a novel range of low bromide ion concentrations (high pBr levels) at the nucleation stage. A variety of advantages can be realized, including thinner and/or larger diameter tabular grains and novel tabular grain forms.
    Type: Grant
    Filed: June 30, 1988
    Date of Patent: April 3, 1990
    Assignee: Eastman Kodak Company
    Inventors: Richard L. Daubendiek, Timothy R. Gersey, Gary S. Proehl
  • X-ray intensifying screen permitting an improved relationship of imaging speed to sharpness
    Patent number: 4912333
    Abstract: An intensifying screen for imagewise exposing a radiographic element is disclosed comprised of a fluorescent layer capable of absorbing X-radiation and emitting longer wavelength electromagnetic radiation to which the radiographic element is responsive and a support capable of redirecting incident longer wavelength radiation back toward the radiographic element. The support includes in at least one portion reflective lenslets.
    Type: Grant
    Filed: September 12, 1988
    Date of Patent: March 27, 1990
    Assignee: Eastman Kodak Company
    Inventors: Luther C. Roberts, Mark A. Pollock, William E. Moore, Jackee B. Raught, Larry K. Maier
  • Barrier layer arrangement for conductive layers on silicon substrates
    Patent number: 4908348
    Abstract: A barrier layer triad intended to protect a silicon substrate and an overlying conductive layer from mutual contamination is disclosed as well as a process for its preparation. The barrier layer triad is comprised of a first triad layer located adjacent the silicon substrate consisting essentially of silica, a third triad layer remote from the silicon substrate consisting essentially of at least one Group 4 heavy metal oxide, and a second triad layer interposed between the first and third triad layers consisting essentially of a mixture of silica and at least one Group 4 heavy metal oxide.
    Type: Grant
    Filed: February 8, 1988
    Date of Patent: March 13, 1990
    Assignee: Eastman Kodak Company
    Inventors: Liang-Sun Hung, John A. Agostinelli
  • Crystalline rare earth alkaline earth copper oxide thick film circuit element with superconducting onset transition temperature in excess of 77%
    Patent number: 4908346
    Abstract: Thick film circuit elements are disclosed comprised of an insulative substrate selected from the group consisting of strontium titanate, magnesia, alumina, and aluminum nitride, and providing a conductive path between at least two locations on the substrate, a crystalline rare earth alkaline earth copper oxide layer exhibiting a superconducting onset transition temperature in excess of 77.degree. C. comprised on an R.sub.1 A.sub.2 C.sub.3 crystalline phase.
    Type: Grant
    Filed: July 1, 1987
    Date of Patent: March 13, 1990
    Assignee: Eastman Kodak Company
    Inventors: Lauri A. Strom, Edward Carnall, Jr., Steven A. Ferranti, Jose M. Mir
  • Novel benzofuran dyes
    Patent number: 4900831
    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: May 9, 1988
    Date of Patent: February 13, 1990
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox
  • Radiographic element
    Patent number: 4900652
    Abstract: A radiographic element is disclosed which exhibits high covering power, reduced crossover without emulsion desensitization, reduced wet pressure sensitivity, and can be fully processed in a rapid transport processor in less than 90 seconds. The radiographic is comprised of tabular grain emulsion layers on opposite sides of a transparent film support and processing solution decolorizable dye particles in hydrophilic colloid layers interposed between the emulsion layers and the support. Hydrophilic colloid on each side of the support is in the range of from 35 to 65 mg/dm.sup.2, with the interposed layer containing hydrophilic colloid in the amount of at least 10 mg/dm.sup.2.
    Type: Grant
    Filed: July 11, 1988
    Date of Patent: February 13, 1990
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, James E. Kelly, Donald R. Diehl, Ronda E. Factor
  • Optical article containing a linear polymer exhibiting a high level of second order polymerization susceptibility
    Patent number: 4900127
    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 a linear polymer containing as pendant groups polar aligned noncentrosymmetric molecular dipoles having an electron donor moiety linked through a conjugated .pi. bonding system to an electron acceptor moiety to permit oscillation of the molecular dipole between a ground state exhibiting a first dipole moment and an excited state exhibiting a differing dipole moment. The linear polymer contains repeating units derived from vinyl addition polymerization, at least 5 percent of the repeating units incorporate the molecular dipoles as pendant groups, and the molecular dipoles include a sulfonyl electron acceptor moiety.
    Type: Grant
    Filed: September 8, 1988
    Date of Patent: February 13, 1990
    Assignee: Eastman Kodak Company
    Inventors: Douglas R. Robello, Abraham Ulman, Craig S. Willand
  • Processes for the manufacture of laser including monolithically integrated planar devices
    Patent number: 4891093
    Abstract: Monolithically integrated devices are disclosed in which a laser having a capping layer with a relatively high conductivity imparting ion concentration is laterally offset along a planar surface from a surface layer having a lower conductivity imparting ion concentration.The monolithically integrated laser and surface layer are formed by providing laterally offset channels in a planar substrate surface and selectively epitaxially growing the required laser layers and the surface layer in separate channels.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: January 2, 1990
    Assignee: Eastman Kodak Company
    Inventor: Frank T. J. Smith
  • Processes for their manufacture of monolithically integrated planar lasers differing in emission wavelengths
    Patent number: 4888085
    Abstract: Lasers differing in emission wavelengths are disclosed monolithically integrated in a common substrate providing positive index guiding of adjacent lasers. The lasers and the substrate together present a planar semiconductive surface.The monolithically integrated laser structure is formed by providing laterally offset channels in a planar substrate surface and selectively depositing cladding and active layers in the channels, with the composition of at least one of the cladding and active layers in one channel differing from that in another.
    Type: Grant
    Filed: September 18, 1986
    Date of Patent: December 19, 1989
    Assignee: Eastman Kodak Company
    Inventor: Frank T. J. Smith
  • Optical article containing a transmission medium exhibiting a high level of second order polarization susceptibility
    Patent number: 4886339
    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 having an electron donor moiety linked through a conjugated .pi. bonding system to an electron acceptor moiety to permit oscillation of the molecular dipole between a ground state exhibiting a first dipole moment and an excited state exhibiting a differing dipole moment. The molecular dipoles are held in polar alignment by a crosslinked polymeric binder.
    Type: Grant
    Filed: September 28, 1987
    Date of Patent: December 12, 1989
    Assignee: Eastman Kodak Company
    Inventors: Michael Scozzafava, Donald P. Specht, Abraham Ulman, Craig S. Willand, David J. Williams
  • Electroluminescent device with improved cathode
    Patent number: 4885211
    Abstract: An electroluminescent device is disclosed comprised of, in sequence, an anode, an organic hole transporting zone, an organic electron transporting zone, and a cathode. The cathode is comprised of a layer of a plurality of metals other than alkali metals, at least one of said metals having a work function of less than 4 eV.
    Type: Grant
    Filed: February 11, 1987
    Date of Patent: December 5, 1989
    Assignee: Eastman Kodak Company
    Inventors: Ching W. Tang, Steven A. VanSlyke
  • Metalorganic deposition process for preparing superconducting oxide films
    Patent number: 4880770
    Abstract: A metalorganic deposition method is disclosed for manufacturing a 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 O.sub.2 atmosphere.
    Type: Grant
    Filed: May 4, 1987
    Date of Patent: November 14, 1989
    Assignee: Eastman Kodak Company
    Inventors: Jose M. Mir, John A. Agostinelli, David L. Peterson, Gustavo R. Paz-Pujalt, Brian J. Higberg, Gopalan Rajeswaran
  • Diode laser with improved means for electrically modulating the emitted light beam intensity including turn-on and turn-off and electrically controlling the position of the emitted laser beam spot
    Patent number: 4878222
    Abstract: A family of semiconductor diode lasers is made available whose emitted laser light beam intensity can be electrically modulated with low voltage, low current modulating control bias signals. By appropriate design of the diode laser devices in accordance with the invention and provision of means for adjusting the relative values of the applied modulating control bias signals, the improved diode lasers can be switched on and off electrically in addition to modulation of the emitted output laser light beam intensity. Further, the physical position of the emitted laser light beam spot along the laser facet readily can be moved by the same electrically operable control means so as to provide modulation, turn-on and turn-off and small lateral movement as well as scanning of the laser light beam in a single heterostructural diode laser device.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: October 31, 1989
    Assignee: Eastman Kodak Company
    Inventor: David J. Lawrence
  • Color filter array containing a photocrosslinked polymeric mordant
    Patent number: 4876167
    Abstract: A color filter array is disclosed containing interlaid sets of laterally displaced filters comprised of a polymeric matrix and at least one dye. At least one of the sets of filters is comprised of an anionic dye and a cationic polymeric mordant having crosslinking repeating units containing two quaternary ammonium mordanting moieties and a photogenerated ethylenic crosslinking moiety.
    Type: Grant
    Filed: August 20, 1987
    Date of Patent: October 24, 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
  • Dye sensitized photographic imaging systems
    Patent number: 4876175
    Abstract: A photographic imaging system is disclosed comprised of a hardenable organic component containing ethylenic unsaturation sites and coinitiators for ethylenic addition. The coinitiators include an activator and a photosensitizer. The photosensitizer is a 6-tertiary amino-2-(Z--CH.dbd.)benzofuran dye, where Z represents the atoms providing an electron withdrawing carbonyl or sulfonyl group and completing a conjugated methine linkage extending from the electron withdrawing carbonyl group through the benzofuran to the electron donating 6-tertiary amino substituent to form a resonant dye chromophore. The photosensitizers bathochromically extend exposure response of the imaging system.
    Type: Grant
    Filed: May 9, 1988
    Date of Patent: October 24, 1989
    Assignee: Eastman Kodak Company
    Inventors: Chin H. Chen, John L. Fox, Donald P. Specht, Samir Y. Farid