1657800

Information

• Patent Grant
• 1657800

• References
• Source

• Patent Number

  1,657,800

• Date Filed

  Not available

• Date Issued

  Tuesday, January 31, 1928
  97 years ago

• CPC

  • C14C3/14 - Fat tanning Oil tanning

• US Classifications

  • 008 - Bleaching and dyeing