Patents by Inventor Melanie W. Marshall

Melanie W. Marshall 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).

  • Au(I) sensitizers for silver halide emulsions
    Patent number: 5939245
    Abstract: This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a Au(I) compound having the formula wherein Z is a substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic groups, or one or both of R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4, may independently combine to form a nitrogen containing ring with the nitrogen to which they are attached.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: August 17, 1999
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Weimar W. White, Melanie W. Marshall
  • Au(I) sensitizers for silver halide emulsions
    Patent number: 5912112
    Abstract: A photographic element comprising a support having situated thereon a silver halide emulsion layer, said emulsion layer comprising a compound of the formula:Z--S--Au(I)--S--Q (I)whereinZ represents an alkyl, aryl, or heterocyclic group; andQ represents a heterocyclic group wherein S and Q together represent a mesoionic group.
    Type: Grant
    Filed: March 5, 1998
    Date of Patent: June 15, 1999
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Weimar W. White, Melanie W. Marshall
  • Gold(I) sensitizers for silver halide emulsions
    Patent number: 5912111
    Abstract: This invention relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a Au(I) compound having the formula ##STR1## wherein Z is a substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic group; and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently substituted or unsubstituted alkyl, aryl, alkylaryl, or heterocyclic groups, or one or both of R.sub.1 and R.sub.2 or R.sub.3 and R.sub.4, may independently combine to form a nitrogen containing ring with the nitrogen to which they are attached.
    Type: Grant
    Filed: February 18, 1998
    Date of Patent: June 15, 1999
    Assignee: Eastman Kodak Company
    Inventors: Roger Lok, Weimar W. White, Melanie W. Marshall