3505980

Information

• Patent Grant
• 3505980

• References
• Source

• Patent Number

  3,505,980

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1970
  55 years ago

• CPC

  • F23M5/085 - using air or other gas as the cooling medium
  • F23C7/06 - for heating the incoming air
  • F23M7/04 - Cooling doors or door frames

• US Classifications

  • 122 - Liquid heaters and vaporizers
  • 110 - Furnaces