3839993

Information

• Patent Grant
• 3839993

• References
• Source

• Patent Number

  3,839,993

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1974
  50 years ago

• CPC

  • F22B37/06 - Flue or fire tubes Accessories therefor
  • F22B13/00 - Steam boilers of fire-box type

• US Classifications

  • 277 - Seal for a joint or juncture
  • 122 - Liquid heaters and vaporizers