Patents by Inventor Elizabeth V. Patton

Elizabeth V. Patton 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).

  • Method of coating thermoreversible heat-thickening polyacrylamides
    Patent number: 5432245
    Abstract: The invention provides acrylamide polymers that, when mixed with water solvent, provide thermoreversible solutions that form low viscosity melts at temperatures separated by a third region of maximum viscosity.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: July 11, 1995
    Assignee: Eastman Kodak Company
    Inventors: Michael R. Roberts, Glenn T. Pearce, Elizabeth V. Patton
  • Development inhibitor reflector layers
    Patent number: 5254441
    Abstract: This invention provides a photographic element containing a polymer layer which reflects a development inhibitor or its precursor released from a DIR compound thereby retarding the diffusion of the development inhibitor to another layer. The polymers used in the barrier layer contain from about 1.times.10.sup.-5 to about 4.times.10.sup.-3 ion forming functional groups. The preferred polymers comprise repeating units of the formula --(A).sub.m -(B).sub.n -- with A derived from a hydrophobic monomer and B derived from an ionic hydrophilic monomer with the more preferred monomers being acrylates, methacrylates, acrylamides and methacrylamides. The invention also provides a method of processing a photographic element containing such a barrier layer.
    Type: Grant
    Filed: October 1, 1991
    Date of Patent: October 19, 1993
    Assignee: Eastman Kodak Company
    Inventors: Glenn T. Pearce, Elizabeth V. Patton, Michael R. Roberts, Ignazio S. Ponticello, George Villard, Susan C. Gross, deceased, Marjorie M. Datskow, executrix