3448973

Information

• Patent Grant
• 3448973

• References
• Source

• Patent Number

  3,448,973

• Date Filed

  Not available

• Date Issued

  Tuesday, June 10, 1969
  55 years ago

• CPC

  • F27D11/04 - with direct passage of current through the material being heated
  • C21C5/56 - Manufacture of steel by other methods
  • C22B4/04 - Heavy metals
  • C22B9/02 - Refining by liquating, filtering, centrifuging, distilling, or supersonic wave action including acoustic waves
  • C22B17/06 - Refining
  • C22B19/00 - Obtaining zinc or zinc oxide
  • C22B19/04 - Obtaining zinc by distilling
  • C22B19/32 - Refining zinc
  • Y02P10/234 - by hydro metallurgy

• US Classifications

  • 266 - Metallurgical apparatus
  • 075 - Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures
  • 373 - Industrial electric heating furnaces