3415691

Information

• Patent Grant
• 3415691

• References
• Source

• Patent Number

  3,415,691

• Date Filed

  Not available

• Date Issued

  Tuesday, December 10, 1968
  56 years ago

• CPC

  • C22F1/008 - Using a protective surface layer
  • C21D1/70 - while heating or quenching

• US Classifications

  • 148 - Metal treatment