1772972

Information

• Patent Grant
• 1772972

• References
• Source

• Patent Number

  1,772,972

• Date Filed

  Not available

• Date Issued

  Tuesday, August 12, 1930
  94 years ago

• CPC

  • F22B21/04 - involving a single upper drum and a single lower drum

• US Classifications

  • 122 - Liquid heaters and vaporizers