3350137

Information

• Patent Grant
• 3350137

• References
• Source

• Patent Number

  3,350,137

• Date Filed

  Not available

• Date Issued

  Tuesday, October 31, 1967
  57 years ago

• CPC

  • E21C27/10 - by both slitting and breaking-down

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 092 - Expansible chamber devices