Protection of photographic material
AssigneeEastman Kodak Company
InventorJohn R. Fyson
Life of this patent
Estimating the term…
Abstract
A method of processing photosensitive materials in which one or more chemical compounds are at least partially retained after processing. The chemical compounds are unique to a particular process used by a copyright owner. The absence of the unique compounds in a processed material thus indicates that the processing has been without the authorization of the copyright owner.
Claims13
A method of processing a photosensitive material in which at least one of the processing solutions includes one or more chemical compounds which are at least partially retained in the material after processing is complete, the structure and composition of the compounds being unique to a particular process used by a particular copyright owner.
A method of detecting the presence or absence of the unique compounds in the processed material, the composition of any unique compounds present being then compared to an expected composition of these compounds.
A method of chemically marking a photosensitive material during the processing thereof to leave a unique chemical composition, the composition being associated with one or more chemical compounds unique to an authorized site, so as to determine if the material has been processed at the authorized site.
A processing solution for use in the processing of a photosensitive material, the solution including at least one chemical compound, the structure and composition of the compounds being unique to a particular process used by a particular copyright owner, at least part of the chemical compounds remaining within the material after processing has taken place.
Dependencies are inferred from the claim text.