3556499

Information

• Patent Grant
• 3556499

• References
• Source

• Patent Number

  3,556,499

• Date Filed

  Not available

• Date Issued

  Tuesday, January 19, 1971
  54 years ago

• CPC

  • C21D1/08 - with flames
  • C21D1/06 - Surface hardening
  • C21D1/667 - for spray quenching

• US Classifications

  • 266 - Metallurgical apparatus
  • 148 - Metal treatment
  • 238 - Railways: surface track