Patents by Inventor Kumars Sakizadeh

Kumars Sakizadeh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photothermographic materials containing print stabilizers
    Patent number: 7258967
    Abstract: Incorporating a sulfonyldiphenol compound into photothermographic materials improves Raw Stock Keeping and post-processing “hot-dark” print stability especially under harsh environmental conditions such as high temperature.
    Type: Grant
    Filed: October 18, 2006
    Date of Patent: August 21, 2007
    Assignee: Carestream Health, Inc.
    Inventors: Kumars Sakizadeh, Kui Chen-Ho, Bryan V. Hunt, Lilia P. Burleva
  • PHOTOTHERMOGRAPHIC MATERIALS INCORPORATING ARYLBORONIC ACIDS
    Publication number: 20070190468
    Abstract: Incorporation of certain arylboronic acid compounds into photothermographic materials provides materials with reduced initial image Dmin and improved hot-dark Dmin print stability without unacceptable loss in sensitometric properties.
    Type: Application
    Filed: February 10, 2006
    Publication date: August 16, 2007
    Inventors: Kui Chen-Ho, Kumars Sakizadeh
  • Photothermographic materials incorporating arylboronic acids
    Patent number: 7255982
    Abstract: Incorporation of certain arylboronic acid compounds into photothermographic materials provides materials with reduced initial image Dmin and improved hot-dark Dmin print stability without unacceptable loss in sensitometric properties.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: August 14, 2007
    Assignee: Carestream Health, Inc.
    Inventors: Kui Chen-Ho, Kumars Sakizadeh
  • Photothermographic materials containing post-processing stabilizers
    Publication number: 20070117053
    Abstract: 1,3-Diaryl-substituted urea compounds have been found to function as post-processing stabilizers in photothermographic materials. These compounds can be presented by the following Structure (I): wherein R1 and R2 are the same or different substituted or unsubstituted aryl group.
    Type: Application
    Filed: November 22, 2005
    Publication date: May 24, 2007
    Inventors: Bryan Hunt, Kumars Sakizadeh
  • Thermally developable materials with backside antistatic layer
    Publication number: 20070072772
    Abstract: Thermally developable materials that comprise a support have an antistatic backside layer that includes a quaternary ammonium salt. The same or different backside layer can also include another antistatic agent such as conductive metal particles or conductive polymers. These thermally developable materials include both thermographic and photothermographic materials that can be suitably imaged to provide images useful for medical diagnoses.
    Type: Application
    Filed: September 28, 2005
    Publication date: March 29, 2007
    Inventors: Kumars Sakizadeh, Thomas Ludemann, Gary LaBelle
  • Blocked aliphatic thiol stabilizers for photothermographic materials
    Patent number: 7169543
    Abstract: Photothermographic materials contain one or more blocked aliphatic thiol compounds in an amount of at least 1 mg/m2 as stabilizers. These compounds have a calculated octanol-water partition coefficient (c log P value) of 2.0 or greater, and an N value equal to or greater than 6.5.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: January 30, 2007
    Assignee: Eastman Kodak Company
    Inventors: William D. Ramsden, James B. Philip, Jr., Doreen C. Lynch, Kui Chen-Ho, Stacy M. Ulrich, Kumars Sakizadeh, Jeffrey W. Leon, George J. Burgmaier
  • Aqueous-based photothermographic materials containing tetrafluoroborate salts
    Patent number: 7166421
    Abstract: Black-and-white, aqueous-based, silver halide-containing photothermographic materials have increased stability both prior to use and after imaging with the incorporation of at least 0.005 g/m2 of a tetrafluoroborate salt.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: January 23, 2007
    Assignee: Eastman Kodak Company
    Inventors: Sharon M. Simpson, Kumars Sakizadeh, Leif P. Olson
  • Direct thermographic materials with catechol borate reducing agents
    Publication number: 20070015660
    Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a catechol borate compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing.
    Type: Application
    Filed: July 18, 2005
    Publication date: January 18, 2007
    Inventors: Kumars Sakizadeh, Peter Cowdery-Corvan, Leif Olson, David Whitcomb
  • Thermographic materials containing ionic liquids
    Patent number: 7163786
    Abstract: Ionic liquids are added to black-and-white direct thermographic materials to provide increased image density or to allow for reduced silver coverage (that is, improved silver efficiency). Useful ionic liquids include imidazolium, pyrazolium, pyridinium, pyrimidinium, pyrazinium, tetra-alkylammonium, or tetra-alkylphosphonium cations.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: January 16, 2007
    Assignee: Eastman Kodak Company
    Inventors: Kumars Sakizadeh, Leif P. Olson, Peter J. Cowdery-Corvan, Takuzo Ishida, David R. Whitcomb
  • Photothermographic materials containing silver halide sensitized with combination of compounds
    Patent number: 7157219
    Abstract: Photothermographic materials are designed with increased photospeed by chemical sensitizing the photosensitive silver halide grains with a combination of compounds. A first chemical sensitizer is a specific gold(III)-containing compound and a second chemical sensitizer is a sulfur-containing compound that is a diphenylphosphine sulfide. The molar ratio of the gold(III)-containing compound to the sulfur-containing compound is at least 1:1.
    Type: Grant
    Filed: September 30, 2005
    Date of Patent: January 2, 2007
    Assignee: Eastman Kodak Company
    Inventors: Sharon M. Simpson, Lilia P. Burleva, Kumars Sakizadeh
  • Direct thermographic materials with phenolic reducing agents
    Patent number: 7135432
    Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a specific ortho-amino-phenol, para-amino-phenol, or hydroquinone compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing. The materials are characterized by their calculated aqueous deprotonation and their calculated anion HOMO energies.
    Type: Grant
    Filed: December 15, 2004
    Date of Patent: November 14, 2006
    Assignee: Eastman Kodak Company
    Inventors: David R. Whitcomb, Leif P. Olson, Peter J. Cowdery-Corvan, Kumars Sakizadeh, Takuzo Ishida
  • Halogen substituted tetraazaindene compounds in photothermographic materials
    Patent number: 7097963
    Abstract: Black-and-white, aqueous-based, silver halide-containing photothermographic materials have increased stability after imaging with the incorporation of at least 0.0002 mol/m2 of a halogen-substituted tetraazaindene compound.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: August 29, 2006
    Assignee: Eastman Kodak Company
    Inventors: Chaofeng Zou, Kumars Sakizadeh, George J. Burgmaier, Roger L. Klaus
  • Thermally development imaging materials having backside stabilizers
    Patent number: 7094524
    Abstract: Thermally developable photothermographic materials comprise a backside layer that includes a backside stabilizer to reduce fog formation in high humidity conditions, thereby providing improved shelf stability. Useful backside stabilizers include an amine organic base whose conjugate acid has a pKa greater than 5. These backside stabilizers can be provided particularly in non-photosensitive compositions that include an antihalation composition.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: August 22, 2006
    Assignee: Eastman Kodak Company
    Inventors: Steven H. Kong, Kumars Sakizadeh, William D. Ramsden
  • Method for chemical sensitization of silver halide for photothermographic use
    Patent number: 7087366
    Abstract: A photothermographic emulsion is prepared by chemically sensitizing silver halide grains formed by oxidative decomposition of a diphenylphosphine sulfide compound on or around the silver halide grains. This procedure uses a unique sequence of steps and provides increased photographic speed and manufacturing reproducibility.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: August 8, 2006
    Assignee: Eastman Kodak Company
    Inventors: Lilia P. Burleva, Kumars Sakizadeh, David R. Whitcomb, Sharon M. Simpson
  • Blocked aliphatic thiol stabilizers for photothermographic materials
    Publication number: 20060141403
    Abstract: Photothermographic materials contain one or more blocked aliphatic thiol compounds in an amount of at least 1 mg/m2 as stabilizers. These compounds have a calculated octanol-water partition coefficient (c log P value) of 2.0 or greater, and an N value equal to or greater than 6.5.
    Type: Application
    Filed: December 29, 2004
    Publication date: June 29, 2006
    Inventors: William Ramsden, James Philip, Doreen Lynch, Kui Chen-Ho, Stacy Ulrich, Kumars Sakizadeh
  • Aqueous-based photothermographic materials containing tetrafluoroborate salts
    Publication number: 20060141402
    Abstract: Black-and-white, aqueous-based, silver halide-containing photothermographic materials have increased stability both prior to use and after imaging with the incorporation of at least 0.005 g/m2 of a tetrafluoroborate salt.
    Type: Application
    Filed: December 29, 2004
    Publication date: June 29, 2006
    Inventors: Sharon Simpson, Kumars Sakizadeh, Leif Olson
  • Method for chemical sensitization of silver halide for photothermographic use
    Patent number: 7063941
    Abstract: A photothermographic emulsion is prepared by chemically sensitizing silver halide grains by oxidative decomposition of an organic sulfur-containing compound on or around the silver halide grains. This procedure uses a unique sequence of steps and provides increased photographic speed and manufacturing reproducibility. The resulting photothermographic emulsion can be used to prepare photothermographic materials.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: June 20, 2006
    Assignee: Eastman Kodak Company
    Inventors: Lilia P. Burleva, Mark C. Skinner, Kumars Sakizadeh, Sharon M. Simpson
  • Direct thermographic materials with phenolic reducing agents
    Publication number: 20060128566
    Abstract: Non-photosensitive direct thermographic materials comprise a reducing agent that is a specific ortho-amino-phenol, para-amino-phenol, or hydroquinone compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing. The materials are characterized by their calculated aqueous deprotonation and their calculated anion HOMO energies.
    Type: Application
    Filed: December 15, 2004
    Publication date: June 15, 2006
    Inventors: David Whitcomb, Leif Olson, Peter Cowdery-Corvan, Kumars Sakizadeh, Takuzo Ishida
  • Conductive underlayers for aqueous-based thermally developable materials
    Patent number: 7056651
    Abstract: Thermally developable materials for thermography or photothermography have imaging layers on one or both sides of the support. Buried conductive underlayers are disposed under these imaging layers on one or both sides of the support, and these conductive underlayers include conductive metal oxide(s) and optionally a smectite clay or lithium salt.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: June 6, 2006
    Assignee: Eastman Kodak Company
    Inventors: Sharon M. Simpson, Jon A. Hammerschmidt, Kumars Sakizadeh
  • Thermally developable imaging materials having backside stabilizers
    Patent number: 7029834
    Abstract: Thermally developable photothermographic materials comprise a backside layer that includes a backside stabilizer to reduce fog formation in high humidity conditions, thereby providing improved shelf stability. Useful backside stabilizers are nitrogen-containing aromatic heterocyclic compounds. These backside stabilizers can be provided particularly in non-photosensitive compositions that include an antihalation composition.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: April 18, 2006
    Assignee: Eastman Kodak Company
    Inventors: Steven H. Kong, Kumars Sakizadeh