1820807

Information

• Patent Grant
• 1820807

• References
• Source

• Patent Number

  1,820,807

• Date Filed

  Not available

• Date Issued

  Tuesday, August 25, 1931
  93 years ago

• CPC

  • F22B17/02 - built-up from water-tube sets in abutting connection with two header boxes in common for all sets

• US Classifications

  • 122 - Liquid heaters and vaporizers