2499508

Information

• Patent Grant
• 2499508

• References
• Source

• Patent Number

  2,499,508

• Date Filed

  Not available

• Date Issued

  Tuesday, March 7, 1950
  75 years ago

• CPC

  • E21B4/08 - impact being obtained by gravity only
  • E02F3/413 - with grabbing device
  • E21B27/00 - Containers for collecting or depositing substances in boreholes or wells

• US Classifications

  • 294 - Handling: hand and hoist-line implements
  • 175 - Boring or penetrating the earth