3674204

Information

• Patent Grant
• 3674204

• References
• Source

• Patent Number

  3,674,204

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1972
  52 years ago

• CPC

  • G05D23/1923 - using thermal energy, the cost of which varies in function of time
  • F24D19/1069 - regulation in function of the temperature of the domestic hot water
  • F24H1/0009 - of the reduced pressure or vacuum steam type
  • F24H9/2007 - for water heaters
  • G05D23/275 - with sensing element expanding, contracting, or fusing in response to changes of temperature

• US Classifications

  • 237 - Heating systems
  • 236 - Automatic temperature and humidity regulation