2490350

Information

• Patent Grant
• 2490350

• References
• Source

• Patent Number

  2,490,350

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1949
  75 years ago

• CPC

  • E21B17/1021 - with articulated arms or arcuate springs
  • E21D5/01 - using prefabricated lining lowered into a hole filled with liquid or viscous mass

• US Classifications

  • 166 - Wells