Patents by Inventor David A. Pupo

David A. Pupo 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).

  • Black-and-white photographic elements and processes
    Patent number: 4126461
    Abstract: Photographic elements for providing black-and-white images contain a silver halide emulsion having associated therewith a non-diffusible resorcinol coupler and a color developing agent or a precursor of a color developing agent. The elements can be processed by simple alkaline activation. Since image density is derived at least in part from the resorcinol coupler, lower silver halide coverages can be employed or the silver can be recovered, or both.
    Type: Grant
    Filed: June 13, 1977
    Date of Patent: November 21, 1978
    Assignee: Eastman Kodak Company
    Inventors: David A. Pupo, Samuel J. Ciurca, Jr., Grant M. Haist, James R. King