2216446

Information

• Patent Grant
• 2216446

• References
• Source

• Patent Number

  2,216,446

• Date Filed

  Not available

• Date Issued

  Tuesday, October 1, 1940
  84 years ago

• CPC

  • C09B35/04 - the tetrazo component being a benzene derivative
  • C09B31/00 - Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
  • C09B31/02 - Disazo dyes
  • C09B31/057 - containing acid groups
  • C09B31/16 - Trisazo dyes
  • C09B35/00 - Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling

• US Classifications

  • 008 - Bleaching and dyeing
  • 534 - Organic compounds