2139472

Information

• Patent Grant
• 2139472

• References
• Source

• Patent Number

  2,139,472

• Date Filed

  Not available

• Date Issued

  Tuesday, December 6, 1938
  86 years ago

• CPC

  • C09B35/64 - Higher polyazo dyes
  • C09B35/50 - Tetrazo dyes

• US Classifications

  • 534 - Organic compounds