Loading patent…
AssigneeEastman Kodak Company
InventorsRoger Lok, Brian P. Cleary, Alton L. Chitty, Weimar W. White
Estimating the term…
This invention relates to a photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a water soluble Au(I) complex having the formula [L—Au—L]n−M+n wherein the complex is symmetrical; L is an organothiosulfonato ligand which is an antifogging, stabilizing, or sensitizing compound, n is 1 to 4, and M is a cationic counterion. This invention further relates to a silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organothiosulfonato Au(I) complex having the formula [A—SO2S—Au—SSO2—A]n−M+n wherein M is a cationic counterion; A is a substituted or unsubstituted organic group; and n is 1 to 4; and wherein the compound is symmetrical. It further relates to a method of preparing a silver halide emulsion utilizing said organothiosulfonato Au(I) complexes.
A photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising a water soluble Au(I) complex having the formula
A silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer comprising an organothiosulfonato Au(I) complex having the formula
A silver halide photographic element comprising a support and a silver halide emulsion layer, the emulsion layer having been chemically sensitized in the presence of an Au(I) complex having the formula
A method of preparing a silver halide emulsion comprising precipitating silver halide grains in an aqueous colloidal medium to form an emulsion, heating the emulsion, and adding to the emulsion, either before or during heating, an organothiosulfonato Au(I) complex having the formula
Dependencies are inferred from the claim text.