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https://patents.google.com/patent/US2150093A/en
US2150093A - Dyestuffs of the anthraquinone series - Google Patents
of the
anthraquinone series
dyestuffs
google
patents
https://patents.google.com/patent/US2155360A/en
US2155360A - Dyestuffs of the anthraquinone series - Google Patents
of the
anthraquinone series
dyestuffs
google
patents
https://patents.google.com/patent/US2036663A/en
US2036663A - Preparation of anthrimide carbazole dyestuffs of the anthraquinone-acridone series -...
preparation
carbazole
dyestuffs
anthraquinone
series