3398721

Information

• Patent Grant
• 3398721

• References
• Source

• Patent Number

  3,398,721

• Date Filed

  Not available

• Date Issued

  Tuesday, August 27, 1968
  56 years ago

• CPC

  • F24D7/00 - Central heating systems employing heat-transfer fluids not covered by groups F24D1/00 - F24D5/00
  • F22B1/167 - using an organic fluid
  • F24H1/43 - helically or spirally coiled
  • F28F23/00 - Features relating to the use of intermediate heat-exchange materials

• US Classifications

  • 122 - Liquid heaters and vaporizers