3894836

Information

• Patent Grant
• 3894836

• References
• Source

• Patent Number

  3,894,836

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1975
  49 years ago

• CPC

  • D21H21/28 - Colorants; Pigments or opacifying agents
  • C09B35/14 - from hydroxy compounds
  • C09B45/28 - containing copper
  • C09B67/0073 - Preparations of acid or reactive dyes in liquid form
  • Y10S8/919 - Paper

• US Classifications

  • 008 - Bleaching and dyeing
  • 162 - Paper making and fiber liberation