2223984

Information

• Patent Grant
• 2223984

• References
• Source

• Patent Number

  2,223,984

• Date Filed

  Not available

• Date Issued

  Tuesday, December 3, 1940
  84 years ago

• CPC

  • E21B29/007 - with a radially-retracting cutter rotating outside the pipe

• US Classifications

  • 166 - Wells