Process for removing stain in a photographic material

Details Process for removing stain in a photographic material Process for removing stain in a photographic material

2005-05-10

2005-05-10

Le, Hoa Van (Department: 1752)

Radiation imagery chemistry: process, composition, or product th

Nonradiation sensitive image processing compositions or...

Developer

C430S933000

Reexamination Certificate

active

06890706

ABSTRACT:
A process for removing stain in a photographic material is described which process comprises incorporation of at least one compound of the formula (I)whereinX 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 R1, independently, is an aminoacid residue from which a hydrogen atom on the amino group has been removed;each R2, independently, is hydrogen, C1-C8alkyl, C1-C8alkoxy, halogen, cyano, COOR, whereinR is hydrogen or C1-C3alkyl, CONH—R in which R has its previous significance, SO2NH—R in which R has its previous significance, NH—COR in which R has its previous significance, or SO3M,whereinM has its previous significance, or, ifn is 1,R2can also be CO—R3in which R3is C1-C3alkyl or phenyl, in that photographic material.

REFERENCES:
patent: 4271395 (1981-06-01), Brinkmann et al.
patent: 4587195 (1986-05-01), Ishikawa et al.
patent: 6210449 (2001-04-01), Rohringer et al.
patent: 62-106965 (1987-05-01), None
patent: 1158443 (1989-06-01), None
patent: 9600221 (1996-01-01), None
patent: 9842685 (1998-10-01), None
patent: 9942454 (1999-08-01), None
Chem. Abstr. 71:126005 for NL 6714386 (1969).
Patent Abstracts of Japan Publication No. 62106965 (1987).

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