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:
May. 25, 1976
Filed:
Nov. 19, 1974
Gerald A Campbell, Rochester, NY (US);
Hyman Cohen, Rochester, NY (US);
Lewis R Hamilton, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A process for preparing photographic elements comprising a support, a layer containing an acid dye or acid dye precursor and a layer containing a dye mordant composition, said process comprising coating on a support with a substantially aqueous dispersion of a polymer containing units according to the formula: ##SPC1## Wherein A represents units of an addition-polymerizable monomer containing at least 2 ethylenically-unsaturated groups; B represents units of a copolymerizable ethylenically unsaturated monomer; Q is N or P; R.sup.1, R.sup.2 and R.sup.3 are independently selected from the group consisting of carbocyclic groups and alkyl groups; M.sup.- is an anion and x is from about 0.25 to about 5 mole percent; y is from about 0 to about 90 mole percent and z is from about 10 to about 99 mole percent; and applying a layer containing acid dyes or acid dye precursors. The polymeric mordants are especially useful in diffusion transfer processes.