Patents by Inventor Julian Wallis

Julian Wallis 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).

  • Silver halide imaging materials
    Patent number: 5800974
    Abstract: A black and white photographic element comprising as a photosensitive medium a layer of a silver halide emulsion characterised in that the photosensitive medium comprises in the same layer or in an adjacent layer thereto a developer comprising a substantially non-diffusing polymeric compound having as a component part of its structure a plurality of units having a nucleus of general formula (I): ##STR1## wherein; each Z independently is a member selected from the group consisting of --OH and a group which leaves an --OH residue when contacted with an alkali (pH .gtoreq.10) at temperatures of .ltoreq.50.degree. C.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: September 1, 1998
    Assignee: Imation Corp.
    Inventors: Julian Wallis, Kevin P. Hall, Stephen Newman, Dian Elizabeth Stevenson