2857125

Information

• Patent Grant
• 2857125

• References
• Source

• Patent Number

  2,857,125

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1958
  66 years ago

• CPC

  • E21D15/44 - Hydraulic, pneumatic, or hydraulic-pneumatic props
  • E21D15/517 - Extension elements
  • E21D23/06 - Special mine caps or special tops of pit-props for permitting step-by-step movement

• US Classifications

  • 254 - Implements or apparatus for applying pushing or pulling force