Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1982-12-28
1983-11-22
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430227, 430228, 430236, 430244, 430245, 430359, 430375, 430383, 430391, 430446, 430505, 430507, 430517, 430520, G03C 700, G03C 140, G03C 184, G03C 554
Patent
active
044169710
ABSTRACT:
In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein each R.sup.1 is the same and is selected from ##STR2## R.sup.2 is alkyl, R.sup.3 is an electron-withdrawing group positioned ortho, meta or para to said N atom, R.sup.4 is hydrogen, alkyl or an electron-withdrawing group positioned ortho, meta or para to said N atom; R.sup.5 is alkyl; X is hydrogen, an electron-withdrawing group or an electron-donating group; and A is an anion. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds, e.g., as photographic light-screening dyes.
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Beilstein's Handbuch der Organischen Chemie, vol. 27, p. 534.
Borror Alan L.
Cincotta Louis
Lee, Jr. John W.
Campbell Sybil A.
Polaroid Corporation
Schilling Richard L.
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