3860222

Information

• Patent Grant
• 3860222

• References
• Source

• Patent Number

  3,860,222

• Date Filed

  Not available

• Date Issued

  Tuesday, January 14, 1975
  49 years ago

• CPC

  • F27D11/02 - Ohmic resistance heating
  • C21D1/773 - under reduced pressure or vacuum
  • F27B5/16 - Arrangements of air or gas supply devices
  • H05B3/00 - Ohmic-resistance heating
  • F27B2005/068 - for external cooling
  • F27B2005/143 - Heating rods disposed in the chamber
  • F27B2005/162 - through closable or non-closable openings of the chamber walls
  • F27B2005/169 - the atmosphere being continuously renewed by exterior means

• US Classifications

  • 266 - Metallurgical apparatus
  • 373 - Industrial electric heating furnaces
  • 432 - Heating