3891821

Information

• Patent Grant
• 3891821

• References
• Source

• Patent Number

  3,891,821

• Date Filed

  Not available

• Date Issued

  Tuesday, June 24, 1975
  49 years ago

• CPC

  • B23K9/04 - Welding for other purposes than joining
  • B22D7/06 - Ingot moulds or their manufacture
  • B22D7/066 - Manufacturing, repairing or reinforcing ingot moulds
  • B23K35/004 - at least one of the workpieces being of a metal of the iron group
  • B23P6/04 - Repairing fractures or cracked metal parts or products

• US Classifications

  • 219 - Electric heating
  • 164 - Metal founding
  • 228 - Metal fusion bonding