Patent US1590685 - Violet vat dyestuffs of the 2 ...

Website URL: https://www.google.de/patents/US1590685

Category: Dining Room Furniture

As new com ounds violet vat d e tufi'. then 9 parts of phosphorus ... As new compoun s violet vat dyestuffs of the 2-thionaphthene-2-indolindigo series ...

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