3502644

Information

• Patent Grant
• 3502644

• References
• Source

• Patent Number

  3,502,644

• Date Filed

  Not available

• Date Issued

  Tuesday, March 24, 1970
  54 years ago

• CPC

  • C09B35/26 - the tetrazo component being a derivative of a diaryl urea
  • C09B29/28 - Amino naphthols
  • C09B29/30 - Amino naphtholsulfonic acid
  • C09B35/02 - Disazo dyes
  • C09B35/027 - in which the coupling component is a hydroxy-amino compound
  • C09B35/21 - of diarylmethane or triarylmethane
  • C09B39/00 - Other azo dyes prepared by diazotising and coupling
  • C09B43/12 - by acylation of amino groups
  • C09B62/0064 - with coupling components containing both hydroxyl and amino groups as directing groups
  • C09B62/008 - Monoazo dyes
  • C09B62/245 - Monoazo dyes
  • C09B62/325 - Monoazo dyes

• US Classifications

  • 534 - Organic compounds
  • 544 - Organic compounds
  • 558 - Organic compounds
  • 562 - Organic compounds