1821291

Information

• Patent Grant
• 1821291

• References
• Source

• Patent Number

  1,821,291

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1931
  93 years ago

• CPC

  • C09B35/227 - the tetrazo component being a derivative of a diaryl sulfide or a diaryl polysulfide
  • Y10S8/918 - Cellulose textile

• US Classifications

  • 008 - Bleaching and dyeing