2257239

Information

• Patent Grant
• 2257239

• References
• Source

• Patent Number

  2,257,239

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1941
  83 years ago

• CPC

  • C14C9/04 - Fixing tanning agents in the leather
  • C14C3/02 - Chemical tanning
  • D06M13/328 - the amino group being bound to an acyclic or cycloaliphatic carbon atom
  • D06M13/463 - derived from monoamines
  • D06P1/56 - Condensation products or precondensation products prepared with aldehydes
  • D06P1/65106 - Oxygen-containing compounds
  • D06P3/32 - leather skins

• US Classifications

  • 008 - Bleaching and dyeing
  • 528 - Synthetic resins or natural rubbers
  • 564 - Organic compounds