1838070

Information

• Patent Grant
• 1838070

• References
• Source

• Patent Number

  1,838,070

• Date Filed

  Not available

• Date Issued

  Tuesday, December 22, 1931
  93 years ago

• CPC

  • C09B61/00 - Dyes of natural origin prepared from natural sources
  • C09B59/00 - Artificial dyes of unknown constitution

• US Classifications

  • 008 - Bleaching and dyeing