2019229

Information

• Patent Grant
• 2019229

• References
• Source

• Patent Number

  2,019,229

• Date Filed

  Not available

• Date Issued

  Tuesday, October 29, 1935
  88 years ago

• CPC

  • C23C22/84 - Dyeing
  • C23C22/67 - with solutions containing hexavalent chromium

• US Classifications

  • 148 - Metal treatment