981722

Information

• Patent Grant
• 981722

• References
• Source

• Patent Number

  981,722

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1911
  113 years ago

• CPC

  • F22B21/088 - involving an upper drum and a lower drum and two lateral drums

• US Classifications

  • 122 - Liquid heaters and vaporizers