1920406

Information

• Patent Grant
• 1920406

• References
• Source

• Patent Number

  1,920,406

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  91 years ago

• CPC

  • C07C63/40 - containing three or more carboxyl groups all bound to carbon atoms of the condensed ring system

• US Classifications

  • 546 - Organic compounds