1812267

Information

• Patent Grant
• 1812267

• References
• Source

• Patent Number

  1,812,267

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1931
  93 years ago

• CPC

  • E21B43/18 - Repressuring or vacuum methods
  • E21D1/14 - Freezing apparatus

• US Classifications

  • 166 - Wells