3869440

Information

• Patent Grant
• 3869440

• References
• Source

• Patent Number

  3,869,440

• Date Filed

  Not available

• Date Issued

  Tuesday, March 4, 1975
  49 years ago

• CPC

  • C09B62/0067 - with heterocyclic compound as coupling component
  • C09B29/3621 - from a pyridine ring
  • C09B31/153 - containing a six-membered ring with one nitrogen atom as the only ring hetero-atom
  • C09B39/00 - Other azo dyes prepared by diazotising and coupling
  • C09B43/40 - by substituting hetero atoms by radicals containing other hetero atoms
  • C09B45/025 - of azo-pyridone series

• US Classifications

  • 534 - Organic compounds
  • 008 - Bleaching and dyeing