3907769

Information

• Patent Grant
• 3907769

• References
• Source

• Patent Number

  3,907,769

• Date Filed

  Not available

• Date Issued

  Tuesday, September 23, 1975
  49 years ago

• CPC

  • C07D213/85 - in position 3
  • C09B29/3639 - from a pyridine ring containing one or more amino groups
  • C09B31/153 - containing a six-membered ring with one nitrogen atom as the only ring hetero-atom
  • C09B43/02 - by sulfonation
  • C09B43/24 - with formation of -O-SO2-R or -O-SO3H radicals
  • C09B62/82 - Azo dyes

• US Classifications

  • 534 - Organic compounds
  • 544 - Organic compounds
  • 546 - Organic compounds