2893493

Information

• Patent Grant
• 2893493

• References
• Source

• Patent Number

  2,893,493

• Date Filed

  Not available

• Date Issued

  Tuesday, July 7, 1959
  65 years ago

• CPC

  • E21B43/121 - Lifting well fluids
  • E21B37/045 - Free-piston scrapers

• US Classifications

  • 166 - Wells
  • 092 - Expansible chamber devices
  • 277 - Seal for a joint or juncture
  • 417 - Pumps