3467575

Information

• Patent Grant
• 3467575

• References
• Source

• Patent Number

  3,467,575

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1969
  55 years ago

• CPC

  • D21H25/02 - Chemical or biochemical treatment
  • D21C9/1057 - Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
  • D21H5/1281 - by chemical treatment
  • D21H17/66 - Salts
  • D21H21/32 - Bleaching agents

• US Classifications

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