3718640

Information

• Patent Grant
• 3718640

• References
• Source

• Patent Number

  3,718,640

• Date Filed

  Not available

• Date Issued

  Tuesday, February 27, 1973
  51 years ago

• CPC

  • C09B43/38 - by reacting two or more ortho-hydroxy naphthoic acid dyes with polyamines
  • C09B33/16 - from other coupling components
  • C09B43/32 - by reacting carboxylic or sulfonic groups, or derivatives thereof, with amines by reacting keto-groups with amines

• US Classifications

  • 534 - Organic compounds
  • 106 - Compositions: coating or plastic
  • 548 - Organic compounds