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Home › Combinations of purine-releasing pyrazolone DIR couplers and pyrazolone of pyrazolotriazole imaging couplers

Combinations of purine-releasing pyrazolone DIR couplers and pyrazolone of pyrazolotriazole imaging couplers

US Patent 6174662 · Granted Jan 16, 2001

Estimated economic value: $12,023,000 ⓘ

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