3809374

Information

• Patent Grant
• 3809374

• References
• Source

• Patent Number

  3,809,374

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  51 years ago

• CPC

  • H02H11/001 - in case of incorrect or interrupted earth connection
  • F24F6/18 - by injection of steam into the air
  • F24H1/00 - Water heaters having heat generating means
  • Y10S261/29 - Heaters submerged in liquid
  • Y10S261/46 - Residue prevention in humidifiers and air conditioners
  • Y10S261/65 - Vaporizers

• US Classifications

  • 261 - Gas and liquid contact apparatus
  • 392 - Electric resistance heating devices