3768580

Information

• Patent Grant
• 3768580

• References
• Source

• Patent Number

  3,768,580

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1973
  51 years ago

• CPC

  • E21B25/06 - the core receiver having a flexible liner or inflatable retaining means
  • E21B25/14 - mounted on pivot transverse to core axis

• US Classifications

  • 175 - Boring or penetrating the earth