2170262

Information

• Patent Grant
• 2170262

• References
• Source

• Patent Number

  2,170,262

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1939
  85 years ago

• CPC

  • C09B5/56 - Preparation from starting materials already containing the indanthrene nucleus
  • C09B1/06 - Preparation from starting materials already containing the anthracene nucleus
  • C09B1/50 - Amino-hydroxy-anthraquinones Ethers and esters thereof
  • C09B3/30 - Preparation from starting materials already containing the dibenzanthrone or isodibenzanthrone nucleus
  • C09B43/18 - by acylation of hydroxyl group or of mercapto group

• US Classifications

  • 534 - Organic compounds
  • 544 - Organic compounds
  • 552 - Organic compounds