2228455

Information

• Patent Grant
• 2228455

• References
• Source

• Patent Number

  2,228,455

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1941
  84 years ago

• CPC

  • C09B1/363 - the acyl groups being residues of a dicarboxylic compound forming a bridge between two anthraquinones
  • C09B3/38 - by introduction of hydrocarbon or acyl residues into amino groups
  • C09B5/00 - Dyes with an anthracene nucleus condensed with one or more heterocyclic rings with or without carbocyclic rings
  • C09B43/36 - with amino-anthracene or amino-anthraquinone dyes

• US Classifications

  • 534 - Organic compounds