2231021

Information

• Patent Grant
• 2231021

• References
• Source

• Patent Number

  2,231,021

• Date Filed

  Not available

• Date Issued

  Tuesday, February 11, 1941
  84 years ago

• CPC

  • C09B39/00 - Other azo dyes prepared by diazotising and coupling
  • C09B31/047 - containing acid groups
  • C09B35/12 - from amines

• US Classifications

  • 534 - Organic compounds