2121887

Information

• Patent Grant
• 2121887

• References
• Source

• Patent Number

  2,121,887

• Date Filed

  Not available

• Date Issued

  Tuesday, June 28, 1938
  86 years ago

• CPC

  • C22B19/02 - Preliminary treatment of ores Preliminary refining of zinc oxide
  • C22B13/00 - Obtaining lead
  • C22B15/0015 - Oxidizing roasting
  • C22B15/0017 - Sulfating or sulfiding roasting
  • C22B15/0071 - containing sulfur
  • C22B19/22 - with leaching with acids
  • Y02P10/234 - by hydro metallurgy
  • Y02P10/236 - of Cu

• US Classifications

  • 423 - Chemistry of inorganic compounds