2740480

Information

• Patent Grant
• 2740480

• References
• Source

• Patent Number

  2,740,480

• Date Filed

  Not available

• Date Issued

  Tuesday, April 3, 1956
  68 years ago

• CPC

  • E21B37/045 - Free-piston scrapers

• US Classifications

  • 166 - Wells
  • 015 - Brushing, scrubbing, and general cleaning