1931646

Information

• Patent Grant
• 1931646

• References
• Source

• Patent Number

  1,931,646

• Date Filed

  Not available

• Date Issued

  Tuesday, October 24, 1933
  90 years ago

• CPC

  • C09B5/58 - by halogenation
  • C07D241/36 - condensed with carbocyclic rings or ring systems
  • C09B5/48 - Bis-anthraquinonediazines (indanthrone)

• US Classifications

  • 544 - Organic compounds