1975162

Information

• Patent Grant
• 1975162

• References
• Source

• Patent Number

  1,975,162

• Date Filed

  Not available

• Date Issued

  Tuesday, October 2, 1934
  90 years ago

• CPC

  • E21B43/04 - Gravelling of wells
  • E03B3/10 - by means of pit wells

• US Classifications

  • 166 - Wells
  • 406 - Conveyors: fluid current