3400689

Information

• Patent Grant
• 3400689

• References
• Source

• Patent Number

  3,400,689

• Date Filed

  Not available

• Date Issued

  Tuesday, September 10, 1968
  56 years ago

• CPC

  • F22B37/645 - involving upper vertically-disposed water tubes and lower horizontally- or helically disposed water tubes

• US Classifications

  • 122 - Liquid heaters and vaporizers