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Fluorescent azolyl benzocoumarin dyestuffs

  • US 4,256,900 A
  • Filed: 05/29/1979
  • Issued: 03/17/1981
  • Est. Priority Date: 02/05/1977
  • Status: Expired due to Term
First Claim
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1. A fluorescent dyestuff selected from the group consisting of ##STR8## in which R is C1 -C4 -alkyl, or C1 -C4 alkyl substituted by OH, C1 -C4 -alkoxy or phenyl-C1 -C4 -alkoxy, andX is an inorganic or organic acid radical.

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