3211694

Information

• Patent Grant
• 3211694

• References
• Source

• Patent Number

  3,211,694

• Date Filed

  Not available

• Date Issued

  Tuesday, October 12, 1965
  59 years ago

• CPC

  • C07D513/04 - Ortho-condensed systems
  • C08K5/0041 - Optical brightening agents, organic pigments
  • C08K5/3462 - Six-membered rings
  • C08K5/3465 - condensed with carbocyclic rings
  • C08K5/46 - with oxygen or nitrogen in the ring
  • C09B17/005 - Dyes containing at least four ortho-condensed rings with at least two ring N-atoms in the system
  • C09B57/00 - Other synthetic dyes of known constitution

• US Classifications

  • 524 - Synthetic resins or natural rubbers
  • 544 - Organic compounds