2183998

Information

• Patent Grant
• 2183998

• References
• Source

• Patent Number

  2,183,998

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1939
  85 years ago

• CPC

  • C09B69/007 - Dyestuffs containing phosphonic or phosphinic acid groups and derivatives
  • C09B62/825 - Monoazo dyes

• US Classifications

  • 008 - Bleaching and dyeing
  • 534 - Organic compounds
  • 558 - Organic compounds