2657981

Information

• Patent Grant
• 2657981

• References
• Source

• Patent Number

  2,657,981

• Date Filed

  Not available

• Date Issued

  Tuesday, November 3, 1953
  71 years ago

• CPC

  • C23F3/02 - Light metals

• US Classifications

  • 216 - Etching a substrate: processes
  • 252 - Compositions