Patents by Inventor John Yorkston

John Yorkston 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).

  • Publication number: 20050104018
    Abstract: Apparatus for acquiring an elongated radiographic image. The apparatus includes a flat panel electronic detector of radiographic images, the detector having a known length; and a transport mechanism for mounting the detector for movement in a direction parallel to the known length so that the detector can be positioned in sequential contiguous partially-overlapping positions to acquire a radiation image greater in length than the detector length. At least one marker is disposed in a region corresponding with each partially-overlapping position of the detector.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 19, 2005
    Inventors: Yun Chang, John Yorkston, David Foos
  • Publication number: 20020081010
    Abstract: Apparatus for acquiring an elongated radiographic image comprising: a flat panel electronic detector of radiographic images, said detector having a known length; and a transport mechanism for mounting said detector for movement in a direction parallel to said known length so that said detector can be positioned in sequential contiguous positions to acquire a radiation image greater in length than said detector length.
    Type: Application
    Filed: December 21, 2000
    Publication date: June 27, 2002
    Inventors: Yun C. Chang, John Yorkston, David H. Foos
  • Patent number: 5753921
    Abstract: An x-ray imaging detector having an x-ray converter layer, a pixellated detection array closely adjoining the x-ray converter layer, and a substrate supporting the detection array, the substrate having a surface nearest said x-ray converter layer, the substrate including one or more elements having atomic numbers greater than 22, said elements having a total concentration in the substrate of greater than about 1 mole percent relative to the total number of moles of elements having atomic numbers of 22 or less, the substrate having a thickness in the same direction as the thickness of the x-ray converter of less than about 0.2 mm.sup.2 divided by the thickness of the converter in millimeters, the substrate having a dimensionless absorption exponent of greater than about 0.5 and less than about 5 for gamma ray emission of Am.sup.241 at about 60 keV;whereinAE(Am.sup.241 60 keV)=t*(k.sub.1 e.sub.1 +k.sub.2 e.sub.2 +k.sub.3 e.sub.3 + . . . )wherein AE(Am.sup.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: May 19, 1998
    Assignees: Eastman Kodak Company, Regents of the University of Michigan
    Inventors: David P. Trauernicht, John Yorkston
  • Patent number: 5650626
    Abstract: An ionizing radiation imaging detector, for use with a ionizing radiation beam source comprising a pixellated conversion-detection unit, and a substrate supporting the conversion-detection unit. The substrate includes one or more elements having atomic numbers greater than 22, the elements having a total concentration in the substrate of greater than about 1 mole percent relative to the total number of moles of elements having atomic numbers of 22 or less. The substrate has a dimensionless absorption exponent of less than 0.5 for gamma ray emission of Am.sup.241 at about 60 keV;whereAE(Am.sup.241 60 keV)=t*(k.sub.1 e.sub.1 +k.sub.2 e.sub.2 +k.sub.3 e.sub.3 + . . . )and wherein AE(Am.sup.241 60 keV) represents the absorption exponent of said substrate relative to the about 60 keV gamma ray emission of Am.sup.241 ; t represents said thickness of said substrate in the principle direction of propagation of said x-ray beam; e.sub.1, e.sub.2, e.sub.3, . . .
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: July 22, 1997
    Assignee: Eastman Kodak Company
    Inventors: David P. Trauernicht, John Yorkston