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Home › Color-forming para-sulfonamidodiphenylamine dye precursor and sulfonimide dye in photographic material and process

Color-forming para-sulfonamidodiphenylamine dye precursor and sulfonimide dye in photographic material and process

US Patent 4390606 · Granted Jun 28, 1983

Estimated economic value: $22,111,000 ⓘ

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