3667544

Information

• Patent Grant
• 3667544

• References
• Source

• Patent Number

  3,667,544

• Date Filed

  Not available

• Date Issued

  Tuesday, June 6, 1972
  52 years ago

• CPC

  • B08B9/0554 - Diablo shaped pigs
  • E21B37/045 - Free-piston scrapers

• US Classifications

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