2730329

Information

• Patent Grant
• 2730329

• References
• Source

• Patent Number

  2,730,329

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1956
  68 years ago

• CPC

  • E21B4/18 - Anchoring or feeding in the borehole
  • E02D7/28 - Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
  • E21B7/006 - combined with a bucket-type container
  • E21B27/00 - Containers for collecting or depositing substances in boreholes or wells
  • E21B27/04 - where the collecting or depositing means including helical conveying means

• US Classifications

  • 175 - Boring or penetrating the earth