3659646

Information

• Patent Grant
• 3659646

• References
• Source

• Patent Number

  3,659,646

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1972
  52 years ago

• CPC

  • F28D9/0025 - the conduits being formed by zig-zag bend plates
  • F24C14/025 - for gaseous fuels
  • F24C15/32 - Arrangements of ducts for hot gases
  • F28F2225/04 - for conduits
  • Y10S165/399 - Corrugated heat exchange plate
  • Y10T29/4935 - Heat exchanger or boiler making

• US Classifications

  • 165 - Heat exchange
  • 029 - Metal working
  • 126 - Stoves and furnaces