3211222

Information

• Patent Grant
• 3211222

• References
• Source

• Patent Number

  3,211,222

• Date Filed

  Not available

• Date Issued

  Tuesday, October 12, 1965
  59 years ago

• CPC

  • E21B31/113 - hydraulically-operated
  • E21B31/1075 - using explosives

• US Classifications

  • 166 - Wells
  • 294 - Handling: hand and hoist-line implements