Patents by Inventor Roberta R. Luhowy

Roberta R. Luhowy 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: 4098783
    Abstract: This invention relates to color providing compounds useful as dye image-forming materials in color photographic processes. These compounds comprise a complete dye, i.e., a dye radical comprising the chromophoric system of a dye, such as, an azo, anthraquinone, azomethine or phthalocyanine dye and a cyclic moiety capable of undergoing cleavage in the presence of silver ion and/or soluble silver complex containing the group ##STR1## wherein said C atom common to said S and N atoms is a tetrahedral carbon atom possessing 4 single covalent bonds. Preferred compounds comprise the radical of an organic dye substituted with [(L).sub.m-1 -Y] wherein L is a divalent organic linking group containing at least one carbon atom, m is a positive integer 1 or 2, and Y is a cyclic moiety selected from ##STR2## WHEREIN R.sup.1 is hydrogen or a monovalent organic radical; R.sup.
    Type: Grant
    Filed: April 29, 1976
    Date of Patent: July 4, 1978
    Assignee: Polaroid Corporation
    Inventors: Ronald F. W. Cieciuch, Roberta R. Luhowy, Frank A. Meneghini, Howard G. Rogers
  • Patent number: 4060417
    Abstract: A silver ion scavenger layer is employed between adjacent silver halide strata to enhance color separation in multicolor photographic images prepared by processes which utilize the imagewise distribution of silver ions and/or soluble silver complex made available during development to liberate a corresponding imagewise distribution of dye or dye intermediate from a color-providing compound.
    Type: Grant
    Filed: May 5, 1975
    Date of Patent: November 29, 1977
    Assignee: Polaroid Corporation
    Inventors: Ronald F. W. Cieciuch, Roberta R. Luhowy, Frank A. Meneghini, Howard G. Rogers