1581638

Information

• Patent Grant
• 1581638

• References
• Source

• Patent Number

  1,581,638

• Date Filed

  Not available

• Date Issued

  Tuesday, April 20, 1926
  99 years ago

• CPC

  • D06P1/24 - Anthraquinone dyes or anthracene nucleus containing vat dyes
  • Y10S8/918 - Cellulose textile

• US Classifications

  • 008 - Bleaching and dyeing