Patents by Inventor David J. Steklenski

David J. Steklenski 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).

  • Patent number: 7304317
    Abstract: Phosphor-containing panels or screens have improved resistance to yellowing and image defects by the incorporation of a primary or secondary amine having a pKa of 8.5 or more and a molecular weight of less than 10,000 daltons into the phosphor layer or an overcoat layer. A peroxide scavenger can also be present to further improve stability of the phosphor panel. The phosphors are preferably storage phosphors containing iodine. This phosphor panels can be prepared using non-peroxide-generating organic solvents for further stabilization.
    Type: Grant
    Filed: March 14, 2006
    Date of Patent: December 4, 2007
    Assignee: Carestream Health, Inc.
    Inventors: Marcus S. Bermel, David J. Steklenski, James H. Griggs, Katherine M. Broadus, Alexandra D. Bermel
  • Patent number: 7267988
    Abstract: An element for ascertaining radiation dosage comprising: a flexible polymeric support, a first coated layer, said coated layer comprising a electrically conducting material and a binder and a second coated layer, said coated layer comprising a binder and alanine wherein the alanine, upon exposure to ionizing radiation, produces radicals that remain stable for long periods of time.
    Type: Grant
    Filed: March 21, 2003
    Date of Patent: September 11, 2007
    Assignee: Carestream Health, Inc.
    Inventor: David J. Steklenski
  • Patent number: 7232256
    Abstract: An intraoral x-ray film packet, comprising: an outer envelope; a film chip disposed within the outer envelope; and a non-lead sheet disposed within the outer envelope, the non-lead sheet being comprised substantially of tin.
    Type: Grant
    Filed: December 12, 2003
    Date of Patent: June 19, 2007
    Assignee: Carestream Healthcare, Inc.
    Inventors: Michael R. McGovern, Kenneth J. Marshall, Carol A. Ryan, David J. Steklenski
  • Patent number: 7211808
    Abstract: A dosimeter and method of measuring an absorbed dose of ionizing radiation using the dosimeter comprising at least one first region containing a radiation sensitive material, and a second region containing an identification mark are described, wherein the method includes the steps of: providing a first region including a radiation sensitive material capable of measuring an absorbed dose of ionizing radiation; providing a second region bearing an identification mark; exposing at least the first region to a dose of ionizing radiation; and reading the signal from the first region. The dosimeter can be used to track location and irradiation of an associated good.
    Type: Grant
    Filed: September 24, 2004
    Date of Patent: May 1, 2007
    Assignee: Eastman Kodak Company
    Inventors: James H. Griggs, David J. Steklenski, Michael T. Wolf, John G. Attwood
  • Patent number: 7147982
    Abstract: A radiographic imaging assembly comprises a symmetric radiographic silver halide film has an overall system speed of at least 1100 to provide images with improved contrast and sharpness and reduced fog. The imaging assembly includes a symmetric radiographic film having a speed of at least 700 that includes at least two silver halide emulsions on each side of the support that comprise tabular silver halide grains. The emulsions closer to the support comprise a suitable crossover control agent. The imaging assembly also includes a pair of phosphor intensifying screens that have an average screen sharpness measurement (SSM) greater than reference Curve A of FIG. 4. The screens can have a support that includes a reflective substrate comprising a continuous polyester phase and microvoids containing inorganic particles dispersed within the polyester phase.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: December 12, 2006
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, Phillip C. Bunch, David J. Steklenski
  • Patent number: 7063459
    Abstract: An intraoral x-ray film packet having non-lead radiation shielding for shielding scattered radiation. The packet includes a film chip and a radiation shielding member. The film chip has two sides and the radiation shielding element is disposed on one side of the film chip to provide radiation shielding when the film packet is exposed to radiation. The radiation shielding element is made of a material including a thermoplastic and a non-lead metal powder and/or non-lead metal compound. In one configuration, the film chip and the radiation shielding element are disposed within a light-tight envelope. In another configuration, the radiation shielding element is one side of the envelope, wherein the envelope has two opposing sides, and the chip is disposed within the envelope.
    Type: Grant
    Filed: October 28, 2004
    Date of Patent: June 20, 2006
    Assignee: Eastman Kodak Company
    Inventors: Michael R. McGovern, David J. Steklenski, Andrew W. Cappella
  • Patent number: 7029819
    Abstract: A phosphor screen comprises an inorganic phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm. The phosphor is disposed on a support that has a reflective substrate comprising a continuous polyester first phase and a second phase dispersed within the continuous polyester first phase. The second phase contains microvoids that in turn contain barium sulfate particles. This support provides improved reflectivity particularly at shorter wavelengths.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: April 18, 2006
    Assignee: Eastman Kodak Company
    Inventors: Thomas M. Laney, David J. Steklenski
  • Patent number: 7005226
    Abstract: A radiographic imaging assembly comprises a symmetric radiographic silver halide film has an overall system speed of at least 200 but less than 800 to provide images with improved contrast and sharpness and reduced fog. The imaging assembly includes a symmetric radiographic silver halide film having a speed of at least 700 that includes two silver halide emulsions on both sides of the support that comprise tabular silver halide grains. The emulsions closer to the support comprise a suitable crossover control agent. The imaging assembly also includes a pair of phosphor intensifying screens that have a screen sharpness measurement (SSM) greater than reference Curve A of FIG. 4. The screens can have a support that includes a reflective substrate comprising a continuous polyester phase and microvoids containing inorganic particles dispersed within the polyester phase.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: February 28, 2006
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, Phillip C. Bunch, David J. Steklenski
  • Patent number: 6967071
    Abstract: An ultra-high-speed radiographic imaging assembly (at least 900 system speed) is useful especially for pediatric radiography to provide images with improved contrast and sharpness and reduced fog. The imaging assembly includes a symmetric film having a speed of at least 400 that includes at least two silver halide emulsion layers on each side of a film support that comprise tabular silver halide grains. The imaging assembly also includes two fluorescent intensifying screens wherein the pair of screens has a screen speed of at least 400 and the screens have an average screen sharpness measurement (SSM) value greater than reference Curve A of FIG. 4. The screens can have a support that includes a reflective substrate comprising a continuous polyester phase and microvoids containing inorganic particles dispersed within the polyester phase.
    Type: Grant
    Filed: October 5, 2004
    Date of Patent: November 22, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, Phillip C. Bunch, David J. Steklenski
  • Patent number: 6892948
    Abstract: A method of measuring an absorbed dose of ionizing radiation using a measuring device that bears an integral identification mark, comprising the steps of: providing a support; disposing on the support a first region capable of measuring an absorbed dose of ionizing radiation; disposing on the support a second region that bears integral identification mark; exposing at least the first region to a dose of ionizing radiation; and reading the signal from the first region.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: May 17, 2005
    Assignee: Eastman Kodak Company
    Inventors: David J. Steklenski, Michael T. Wolf, Wayne K. Shaffer, James H. Griggs
  • Patent number: 6887641
    Abstract: A method of mammography imaging includes exposing a patient to a peak voltage greater than 29 kVp using X-radiation generating equipment comprising rhodium or tungsten anodes. The film used in this method comprises a cubic grain silver halide emulsion layer on one side of the support and a tabular grain silver halide emulsion layer on the other side. The cubic grain silver halide emulsion layer comprises a combination of first and second spectral sensitizing dyes that provides a combined maximum J-aggregate absorption on the cubic silver halide grains of from about 540 to about 560 nm. The first spectral sensitizing dye is an anionic benzimidazole-benzoxazole carbocyanine, the second spectral sensitizing dye is an anionic oxycarbocyanine. The cubic grain silver halide emulsion layer also includes a mixture of gelatin or a gelatin derivative and a second hydrophilic binder other than gelatin or a gelatin derivative.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: May 3, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, William E. Moore, David J. Steklenski
  • Patent number: 6869675
    Abstract: This invention provides an element comprising a wear-resistant coating wherein said coating comprises radiation-cured urethane acrylate polymers and micronized polytetrafluoroethylene particles.
    Type: Grant
    Filed: November 12, 2002
    Date of Patent: March 22, 2005
    Assignee: Eastman Kodak Company
    Inventors: Mridula Nair, David J. Steklenski, Tamara K. Jones
  • Patent number: 6864045
    Abstract: A radiographic silver halide film comprises a cubic grain silver halide emulsion layer on one side of the support and a tabular grain silver halide emulsion layer on the other side. The cubic grain silver halide emulsion layer comprises a combination of first and second spectral sensitizing dyes that provides a combined maximum J-aggregate absorption on the cubic silver halide grains of from about 540 to about 560 nm. The first spectral sensitizing dye is an anionic benzimidazole-benzoxazole carbocyanine, the second spectral sensitizing dye is an anionic oxycarbocyanine. The cubic grain silver halide emulsion layer also includes a mixture of gelatin or a gelatin derivative and a second hydrophilic binder other than gelatin or a gelatin derivative at a weight ratio of first to second hydrophilic binder of from about 2:1 to about 5:1. The cubic silver halide grains comprise from about 1 to about 20 mol % chloride and from about 0.25 to about 1.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: March 8, 2005
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, William E. Moore, David J. Steklenski
  • Patent number: 6852987
    Abstract: A storage phosphor cassette for use in recording radiographic images of elongated objects. The cassette includes: first and second storage phosphor plates having first and second length dimensions, a shell having first and second opposite open ends; a first assembly for detachably mounting said first storage phosphor plate in said shell from said first open end; and a second assembly for detachably mounting said second storage phosphor plate in said shell from said second open end, wherein said first and second storage phosphor plates are mounted in said shell such that they form a substantially continuous storage phosphor composite for recording an elongated radiographic image.
    Type: Grant
    Filed: December 20, 2000
    Date of Patent: February 8, 2005
    Assignee: Eastman Kodak Company
    Inventors: David J. Steklenski, David H. Foos
  • Patent number: 6846606
    Abstract: A phosphor screen comprises an inorganic phosphor capable of absorbing X-rays and emitting electromagnetic radiation having a wavelength greater than 300 nm. The phosphor is disposed on a support that has a reflective substrate comprising a continuous poly(lactic acid) first phase and a second phase dispersed within the continuous poly(lactic acid) first phase. The second phase contains microvoids that in turn contain barium sulfate particles. This support provides improved reflectivity particularly at shorter wavelengths.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: January 25, 2005
    Assignee: Eastman Kodak Company
    Inventors: Thomas M. Laney, Peter T. Aylward, David J. Steklenski
  • Patent number: 6828077
    Abstract: A method of mammography imaging includes exposing a patient to a peak voltage greater than 29 kVp. The film used in this method comprises a cubic grain silver halide emulsion layer on one side of the support and a tabular grain silver halide emulsion layer on the other side. The cubic grain silver halide emulsion layer comprises a combination of first and second spectral sensitizing dyes that provides a combined maximum J-aggregate absorption on the cubic silver halide grains of from about 540 to about 560 nm. The first spectral sensitizing dye is an anionic benzimidazole-benzoxazole carbocyanine, the second spectral sensitizing dye is an anionic oxycarbocyanine. The cubic grain silver halide emulsion layer also includes a mixture of gelatin or a gelatin derivative and a second hydrophilic binder other than gelatin or a gelatin derivative. The cubic silver halide grains comprise from about 1 to about 20 mol % chloride and from about 0.25 to about 1.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: December 7, 2004
    Assignee: Eastman Kodak Company
    Inventors: Robert E. Dickerson, William E. Moore, David J. Steklenski
  • Publication number: 20040238767
    Abstract: An apparatus and method for removing stored energy from a storage phosphor screen in which a radiation image was recorded and then read by collecting stimulated emission from the phosphor sheet. The method is accomplished by directing onto the storage phosphor sheet an erasing light having substantially no light of a wavelength of shorter than 410 nm. The apparatus of an erasing light is provided by coating a light source with a yellow dye.
    Type: Application
    Filed: May 6, 2004
    Publication date: December 2, 2004
    Inventors: David J. Steklenski, James H. Griggs
  • Publication number: 20040240622
    Abstract: A radiographic imaging assembly comprises a radiographic silver halide film and a single fluorescent intensifying screen that has protective overcoat that comprises a miscible blend of a first polymer that is poly(vinylidene fluoride-co-tetrafluoroethylene) and a second polymer that is a poly(alkyl acrylate or methacrylate). This imaging assembly is particularly useful for mammography or imaging or other soft tissues.
    Type: Application
    Filed: May 30, 2003
    Publication date: December 2, 2004
    Applicant: Eastman Kodak Company
    Inventors: David J. Steklenski, James H. Griggs
  • Publication number: 20040184955
    Abstract: An element for ascertaining radiation dosage comprising: a support on which is disposed a coated layer, said coated layer comprising a hydrophobic binder and alanine; wherein the alanine, upon exposure to ionizing radiation, produces radicals that remain stable for long periods.
    Type: Application
    Filed: March 21, 2003
    Publication date: September 23, 2004
    Inventors: David J. Steklenski, John Gordon Attwood
  • Publication number: 20040184956
    Abstract: An element for ascertaining radiation dosage comprising: a flexible polymeric support, a first coated layer, said coated layer comprising a electrically conducting material and a binder and a second coated layer, said coated layer comprising a binder and alanine wherein the alanine, upon exposure to ionizing radiation, produces radicals that remain stable for long periods of time.
    Type: Application
    Filed: March 21, 2003
    Publication date: September 23, 2004
    Applicant: Eastman Kodak Company
    Inventor: David J. Steklenski