3257992

Information

• Patent Grant
• 3257992

• References
• Source

• Patent Number

  3,257,992

• Date Filed

  Not available

• Date Issued

  Tuesday, June 28, 1966
  58 years ago

• CPC

  • F22B21/14 - involving a single upper drum and two or more lower drums

• US Classifications

  • 122 - Liquid heaters and vaporizers
  • 110 - Furnaces