1691934

Information

• Patent Grant
• 1691934

• References
• Source

• Patent Number

  1,691,934

• Date Filed

  Not available

• Date Issued

  Tuesday, November 20, 1928
  96 years ago

• CPC

  • F22B21/12 - involving two or more upper drums and two or more lower drums

• US Classifications

  • 122 - Liquid heaters and vaporizers
  • 196 - Mineral oils: apparatus