Patents by Inventor Wendell F. Smith

Wendell F. Smith 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: 5597685
    Abstract: Color photographic element comprising residual magenta coupler scavenger ionizable epoxy compounds in combination with a specific class of image stabilizers are disclosed. Such elements comprise a support bearing thereon: (a) a photosensitive first layer comprising (i) a silver halide emulsion, (ii) a magenta coupler dispersion, and (iii) an image stabilizer of the following formula STG-A: ##STR1## wherein R.sub.1 represents an alkyl group, a cycloalkyl group, an alkenyl phenyl group, an aryl group, a heterocyclic group, an acyl group, a bridged hydrocarbon group, an alkyl sulfonyl group or an aryl sulfonyl group; R.sub.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: January 28, 1997
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Jr.
  • Patent number: 5543276
    Abstract: Thermal and photochemical yellowing of a color photographic element, such as a color print, is inhibited by incorporating into the photographic element an ionizable epoxy compound having the formula: ##STR1## wherein: R is H, alkyl, substituted alkyl, aryl, or substituted aryl;L.sub.1 is alkyl, substituted alkyl, aryl, or substituted aryl;L.sub.2 is O, CO, S, SO.sub.2, PO.sub.2, C(O)O, NHCO or NHSO.sub.2 ;L.sub.3 is alkyl or substituted alkyl;m is 0 or 1;p is 0 or 1;X is selected from the group consisting of ##STR2## wherein: R' is H, alkyl, substituted alkyl, aryl or substituted aryl,or, if L.sub.2 comprises an ionizable group, X is alkyl, substituted alkyl, aryl or substituted aryl.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: August 6, 1996
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Jr., Paul P. Spara, Sundaram Krishnamurthy
  • Patent number: 5508147
    Abstract: Yellowing of a processed photographic element is inhibited by incorporating a scavenger comound capable of reacting with magenta coupler, e.g. an epoxy compound, in a layer adjacent a layer containing the magenta coupler. In a preferred embodiment, the magenta coupler containing layer is sandwiched between layers containing the scavenger compound. Prior to processing at least one of these layers contains a solubilizing agent for the scavenger compound. In preferred embodiments, the processing solution used to process the photographic element containing an external solubilizing agent for the scavenger compound, preferably benzyl alcohol.
    Type: Grant
    Filed: January 4, 1993
    Date of Patent: April 16, 1996
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Sundaram Krishnamurthy
  • Patent number: 5476756
    Abstract: Yellowing of a processed photographic element is inhibited by incorporating a scavenger compound capable of reacting with magenta coupler, e.g. an epoxy compound, in a layer adjacent a layer containing the magenta coupler. At least one of these layers contains a solubilizing agent for the scavenger compound. In preferred embodiments, the processing solution used to process the photographic element contains an external solubilizing agent for the scavenger compound, preferably benzyl alcohol.
    Type: Grant
    Filed: June 8, 1994
    Date of Patent: December 19, 1995
    Assignee: Eastman Kodak Company
    Inventors: Krishnan Chari, Wendell F. Smith, Sundaram Krishnamurthy
  • Patent number: 5366842
    Abstract: The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable.
    Type: Grant
    Filed: July 23, 1993
    Date of Patent: November 22, 1994
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, James L. Edwards, Wendell F. Smith, Jr., Brian Thomas
  • Patent number: 5264317
    Abstract: The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: November 23, 1993
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, James L. Edwards, Wendell F. Smith, Jr., Brian Thomas
  • Patent number: 5185230
    Abstract: The invention creates a selective oxygen barrier around individual coupler or other photographically active particles by surrounding each particle with a layer of water applicable oxygen barrier polymer such as polyvinyl alcohol (PVA), which will also act as a steric barrier to coalescence of the particles. Photographic products formed with such materials are more dye stable.
    Type: Grant
    Filed: September 3, 1991
    Date of Patent: February 9, 1993
    Assignee: Eastman Kodak Company
    Inventors: Pranab Bagchi, James L. Edwards, Wendell F. Smith, Jr., Brian Thomas
  • Patent number: 4050938
    Abstract: A photographic element is disclosed containing one or more hydrophilic coatings thereon including an organic dye or precursor thereof dispersed in a water-immiscible solvent therefor. The solvent additionally includes therein a chelated-metal compound, termed a quenching compound, having a spectrophotometric absorption peak bathochromic relative to the absorption peak of the compound to be stabilized.
    Type: Grant
    Filed: July 1, 1975
    Date of Patent: September 27, 1977
    Assignee: Eastman Kodak Company
    Inventors: Wendell F. Smith, Jr, George A. Reynolds
  • Patent number: 4042394
    Abstract: A photographic element is disclosed comprised of a support and at least one layer containing a photographic imaging dye or its precursor. The imaging dye is chosen to have an absorption peak below 590 nm. An azomethine dye having an absorption peak above 700 nm is associated with the imaging dye or its precursor within the photographic layer. The azomethine dye reduces the rate of fading of the imaging dye upon exposure to visible light. A process for stabilizing a photographic dye image is also disclosed.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: August 16, 1977
    Assignee: Eastman Kodak Company
    Inventors: Wendell F. Smith, Jr., Kenneth L. Eddy, Donald P. Harnish