The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 24, 1982
Filed:
Jun. 22, 1981
Donald F McLaen, Rochester, NY (US);
Arthur H Herz, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A stain retarding concentration of a phosphine antistain agent or phosphine antistain agent precursor in the undercoat layer of a photographic silver halide element comprising a support having thereon (a) a photographic silver halide gelatino emulsion layer, and (b) an undercoat layer between the emulsion layer and the support, provides reduced stain in the element upon exposure and processing. The photographic element preferably comprises a silver halide developing agent. The photographic element, after exposure, is preferably processed by means of an aqueous alkaline activator bath and then an aqueous thiosulfate stabilizer bath.