Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1986-04-01
1988-03-01
Michl, Paul R.
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430233, 430356, 430611, 430965, 544263, G03C 102, G03C 106, G03C 546
Patent
active
047286016
ABSTRACT:
Tetra-aza indene compounds of the formula ##STR1## wherein R.sub.1 is alkyl or a ring system and R.sub.2 and R.sub.3 are hydrogen or alkyl.
These compounds are of use as image toners in photographic materials.
REFERENCES:
patent: 2566659 (1951-09-01), Fry
patent: 3418130 (1968-12-01), Stevens et al.
Dale Michael E.
Ficken Geoffrey E.
Long William E.
Rowland David
Yates Andrew W.
Ciba-Geigy AG
Michl Paul R.
Wright Lee C.
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