2168947

Information

• Patent Grant
• 2168947

• References
• Source

• Patent Number

  2,168,947

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1939
  85 years ago

• CPC

  • C09B1/473 - the acyl groups being residues of a sulfonic acid
  • C09B1/28 - substituted by alkyl, aralkyl or cyclo alkyl groups
  • C09B1/285 - Dyes with no other substituents than the amino groups
  • C09B1/303 - only sulfonated in the anthracene nucleus
  • C09B1/40 - the acyl groups being residues of an aliphatic or araliphatic carboxylic acid
  • C09B1/42 - the acyl groups being residues of an aromatic carboxylic acid
  • C09B1/545 - Anthraquinones with aliphatic, cycloaliphatic or araliphatic ether groups

• US Classifications

  • 552 - Organic compounds