Gas separation: apparatus – Electric field separation apparatus – Electrode retaining or supporting means
Patent
1975-02-03
1976-10-05
Louie, Jr., Won H.
Gas separation: apparatus
Electric field separation apparatus
Electrode retaining or supporting means
96 84R, 96 89, 260240A, 260 40R, 96101, 961141, G03C 178, G03C 184, G03C 172
Patent
active
039842487
ABSTRACT:
Novel o-nitro-substituted arylidene dyes are provided in which the o-nitro aryl group of the arylidene dye is joined through a methine chain linkage to a basic heterocyclic radical containing an electron donating atom. These dyes are photobleachable. The photobleachable properties are useful 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 and to provide photobleachable halation protection in photographic elements having coated thereon a photographic imaging layer. The o-nitro-substituted arylidene dyes can be used for antihalation purposes in photothermographic elements. The dyes can be incorporated within silver halide emulsions to reduce internal light scattering (i.e., internal halation) or to desensitize the emulsion. The dyes are also useful in filter layers.
REFERENCES:
patent: 1880573 (1932-10-01), Wendt et al.
patent: 3104973 (1963-09-01), Sprague et al.
patent: 3647433 (1972-03-01), Contois
Eastman Kodak Company
Louie, Jr. Won H.
Thomas Carl O.
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