2772140

Information

• Patent Grant
• 2772140

• References
• Source

• Patent Number

  2,772,140

• Date Filed

  Not available

• Date Issued

  Tuesday, November 27, 1956
  68 years ago

• CPC

  • C14C3/24 - using lignin derivatives
  • D21C11/0007 - Recovery of by-products

• US Classifications

  • 008 - Bleaching and dyeing
  • 530 - Chemistry: natural resins or derivatives