Patents by Inventor Sanford Howard Ehrlich

Sanford Howard Ehrlich 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: 5736310
    Abstract: Radiation sensitive emulsions are disclosed comprised of silver iodochloride grains having three pairs of equidistantly spaced parallel {100} crystal faces and containing from 0.05 to 3 mole percent iodide, based on total silver, in a controlled, non-uniform iodide distribution forming a core containing at least 50 percent of total silver, a surface shell, and a sub-surface shell that contains a maximum iodide concentration and provides, when the emulsion is exposed to 390 nm electromagnetic radiation at 10.degree. K., stimulated fluorescent emissions in the range of from 450 to 470 nm and at 500, the stimulated fluorescent emission in the range of from 450 to 470 nm having a peak intensity more than twice the stimulated fluorescent emission intensity at 500 nm.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: April 7, 1998
    Assignee: Eastman Kodak Company
    Inventors: Benjamin Teh-Kung Chen, James Lawrence Edwards, Roger Lok, Sanford Howard Ehrlich
  • Patent number: 5728516
    Abstract: Photographic print elements are disclosed of enhanced speed and controlled minimum densities provided by emulsion layer units that contain emulsions that are blends of (a) cubical silver iodochloride grains that contain iodide in a controlled, non-uniform distribution forming a core containing at least half of total silver, a iodide-free surface shell having a thickness of greater than 25 .ANG., and a sub-surface shell that contains a maximum iodide concentration and (b) minimum density controlling silver halide grains that are of smaller mean grain size than the silver iodochloride grains and that consist essentially of chloride and/or bromide and are present in a molar concentration at least equal to that of silver iodide in the silver iodochloride grains.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: March 17, 1998
    Assignee: Eastman Kodak Company
    Inventors: James Lawrence Edwards, Benjamin Teh-Kung Chen, Sanford Howard Ehrlich
  • Patent number: 5726005
    Abstract: A photographic print element is disclosed having a reflective support and at least one image recording emulsion layer unit containing cube-like silver iodochloride grains containing from 0.05 to 3 mole percent iodide, based on total silver, in a controlled, non-uniform iodide distribution forming a core, an iodide-free surface shell having a thickness of greater than 50 .ANG., and a sub-surface shell that contains a maximum iodide concentration.
    Type: Grant
    Filed: May 17, 1996
    Date of Patent: March 10, 1998
    Assignee: Eastman Kodak Company
    Inventors: Benjamin Teh-Kung Chen, James Lawrence Edwards, Roger Lok, Sanford Howard Ehrlich