2170349

Information

• Patent Grant
• 2170349

• References
• Source

• Patent Number

  2,170,349

• Date Filed

  Not available

• Date Issued

  Tuesday, August 22, 1939
  85 years ago

• CPC

  • F22B29/064 - involving horizontally- or helically-disposed water tubes

• US Classifications

  • 122 - Liquid heaters and vaporizers