O-Nitro-o-azaarylidene photobleachable dyes and photographic ele

Details O-Nitro-o-azaarylidene photobleachable dyes and photographic ele O-Nitro-o-azaarylidene photobleachable dyes and photographic ele

1977-06-06

1978-09-05

Louie, Jr., Won H.

Gas separation: apparatus

Electric field separation apparatus

Electrode retaining or supporting means

96 84R, 96 89, 96101, 961141, 542405, G03C 178, G03C 184, G03C 136

Patent

active

041116992

ABSTRACT:
Novel o-nitro-o-azaarylidene dyes are provided in which the o-nitro-o-azaaryl group of the dye is joined through a methine linkage to a basic heterocyclic nucleus containing an electron donating atom. These dyes are photobleachable. The photobleachable properties of the dyes make them useful in a variety of photographic applications. For example, they can be used to provide light-sensitive elements in which images can be formed in or on a support by exposure to light to which the dye is sensitive; or to provide photobleachable halation protection in photographic, including photothermographic, elements having coated thereon a photosensitive imaging layer. The dyes are also useful in filter layers.

REFERENCES:
patent: 3984248 (1976-10-01), Sturmer
patent: 4033948 (1977-07-01), Brown

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