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Home › Photographic materials and processes comprising color-forming sulfonamidodiphenylamine dye precursors and corresponding phenazine dyes

Photographic materials and processes comprising color-forming sulfonamidodiphenylamine dye precursors and corresponding phenazine dyes

US Patent 4368246 · Granted Jan 11, 1983

Estimated economic value: $7,283,000 ⓘ

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