1820507

Information

• Patent Grant
• 1820507

• References
• Source

• Patent Number

  1,820,507

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • F23K3/06 - for shaft-type furnaces
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 110 - Furnaces
  • 236 - Automatic temperature and humidity regulation
  • 307 - Electrical transmission or interconnection systems