3300253

Information

• Patent Grant
• 3300253

• References
• Source

• Patent Number

  3,300,253

• Date Filed

  Not available

• Date Issued

  Tuesday, January 24, 1967
  58 years ago

• CPC

  • B28D1/221 - by thermic methods
  • E01C23/0953 - by thermal effect
  • Y10T83/293 - Of tool

• US Classifications

  • 299 - Mining or in situ disintegration of hard material
  • 083 - Cutting
  • 125 - Stone working
  • 175 - Boring or penetrating the earth
  • 219 - Electric heating