3825409

Information

• Patent Grant
• 3825409

• References
• Source

• Patent Number

  3,825,409

• Date Filed

  Not available

• Date Issued

  Tuesday, July 23, 1974
  50 years ago

• CPC

  • F27D1/021 - Suspended roofs
  • F27D2009/0005 - the cooling medium being a gas

• US Classifications

  • 432 - Heating
  • 110 - Furnaces