673640

Information

• Patent Grant
• 673640

• References
• Source

• Patent Number

  673,640

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1901
  123 years ago

• CPC

  • C09B49/02 - from nitro compounds of the benzene, naphthalene or anthracene series

• US Classifications

  • 568 - Organic compounds
  • 008 - Bleaching and dyeing