3902473

Information

• Patent Grant
• 3902473

• References
• Source

• Patent Number

  3,902,473

• Date Filed

  Not available

• Date Issued

  Tuesday, September 2, 1975
  50 years ago

• CPC

  • F24H9/0052 - for air heaters
  • F24D5/04 - with return of the air or the air-heater
  • F24H3/065 - using fluid combustibles
  • Y10S261/15 - Duct humidifiers

• US Classifications

  • 126 - Stoves and furnaces
  • 261 - Gas and liquid contact apparatus