3547774

Information

• Patent Grant
• 3547774

• References
• Source

• Patent Number

  3,547,774

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1970
  54 years ago

• CPC

  • D21H21/28 - Colorants; Pigments or opacifying agents
  • C09B56/06 - Bis- or polystilbene azo dyes

• US Classifications

  • 162 - Paper making and fiber liberation
  • 562 - Organic compounds