519523

Information

• Patent Grant
• 519523

• References
• Source

• Patent Number

  519,523

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1894
  131 years ago

• CPC

  • C09B33/26 - Tetrazo dyes of the type A->B->C->K<-D

• US Classifications

  • 534 - Organic compounds