Photographic silver halide material with 2-equivalent, N-heteroc

Details Photographic silver halide material with 2-equivalent, N-heteroc Photographic silver halide material with 2-equivalent, N-heteroc

1975-08-13

1979-02-06

Schilling, Richard L.

Gas separation: apparatus

Electric field separation apparatus

Collecting electrode details

96 565, G03C 140, G03C 700

Patent

active

041382633

ABSTRACT:
2-Equivalent yellow couplers for the production of yellow dye images in color photographic silver halide materials have as splittable group a nitrogen-containing 6-membered heteroaromatic ring which is linked by the said nitrogen atom to the coupling position of the coupler molecule, contains a carbonyl group adjacent said nitrogen, and also contains one or two additional nitrogens as well as a fused-on aromatic carbocyclic ring. When the heteroaromatic ring contains two additional nitrogens, all three nitrogens are vicinal; when it contains only one additional nitrogen, the splittable group is a 1,3-quinazolinone-4 having at least one carboxy, with lower aliphatic alcohols esterified carboxy, nitro, methyl or chloro substituent.

REFERENCES:
patent: 3900483 (1975-08-01), Fujimatsu et al.

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