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:
Jan. 14, 2003
Filed:
Sep. 13, 2001
Ciba Specialty Chemicals Corporation, Tarrytown, NY (US);
Abstract
A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of formula (I) wherein X is O or NH; n is 1 or 2, p is 0, 1 or 2, M is hydrogen, an alkali metal atom, ammonium or a cation formed from an amine; each R , independently, is an amimoacid residue from which a hydrogen atom on the amino group has been removed; each R , independendy, is hydrogen, C -C alkyl, C -C alkoxy, halogen, cyano, COOR, wherein R is hydrogen or C -C alky1, CONH—R in which R has its previous significance, SO NH—R in which R has its previous significance, NH—COR in which R has its previous significance, or SO M, wherein M has its previous significance, or, if n is 1, R can also be CO—R in which R is C -C alkyl or phenyl, in that photographic material.