Novel xanthene compounds and photographic products and processes

Details Novel xanthene compounds and photographic products and processes Novel xanthene compounds and photographic products and processes

1979-12-26

1981-03-24

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, 430375, 430383, 430391, 430446, 430507, 430513, 430517, G03C 140, G03C 184, G03C 554, G03C 148

Patent

active

042581192

ABSTRACT:
In one embodiment, the present invention is concerned with novel xanthene compounds of the formula ##STR1## wherein X is ##STR2## wherein R' is alkyl, Y is an electron-withdrawing group and n is 0 or 1. In another embodiment, the present invention is concerned with photographic products and processes employing these xanthene compounds.

REFERENCES:
patent: 1879537 (1932-09-01), Schneider
patent: 1994876 (1935-03-01), Schneider et al.
patent: 2182794 (1939-12-01), Dawson
patent: 2203767 (1940-06-01), Baldsiefen
patent: 2203768 (1940-06-01), Baldsiefen
patent: 2350090 (1944-05-01), Beilenson
patent: 3005711 (1961-10-01), Burgardt et al.
patent: 3406069 (1968-10-01), Overman
patent: 3615548 (1971-10-01), Firestine

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