Patents by Inventor Marion R. Palmer

Marion R. Palmer 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).

  • Processing of photographic silver halide materials
    Patent number: 4948714
    Abstract: Method of processing photographic silver halide material wherein an imagewise release of the development inhibitor 1-aryltetrazole-5-thiol is achieved during processing.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: August 14, 1990
    Assignee: Ilford Limited
    Inventors: William E. Long, Kenneth M. McCombe, Marion R. Palmer, Terence C. Webb