2989427

Information

• Patent Grant
• 2989427

• References
• Source

• Patent Number

  2,989,427

• Date Filed

  Not available

• Date Issued

  Tuesday, June 20, 1961
  63 years ago

• CPC

  • C23C22/84 - Dyeing
  • C23C22/24 - containing hexavalent chromium compounds

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 148 - Metal treatment