1213776

Information

• Patent Grant
• 1213776

• References
• Source

• Patent Number

  1,213,776

• Date Filed

  Not available

• Date Issued

  Tuesday, January 23, 1917
  108 years ago

• CPC

  • E21B21/10 - Valve arrangements in drilling fluid circulation systems
  • Y10T137/86179 - Drain valve actuator mounted on pump

• US Classifications

  • 166 - Wells
  • 137 - Fluid handling
  • 251 - Valves and valve actuation