Patents by Inventor William Edward Long

William Edward Long 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 monochrome photographic silver halide print material
    Patent number: 5770351
    Abstract: There is described a method of processing silver halide photographic material in a processing machine using a developing solution which comprises either a hydroquinone type developing agent or a reductone type developing agent, together with an electron transfer agent as an auxiliary developing agent, and with at least one basic compound the anion of which is carbonate, sulphite or hydroxide, where in the presence of a compound of formula (I), Ar is an aromatic ring or heterocyclic aromatic ring which is optionally substituted.
    Type: Grant
    Filed: August 15, 1997
    Date of Patent: June 23, 1998
    Assignee: Ilford Limited
    Inventors: William Edward Long, Michael John Parker