1881697

Information

• Patent Grant
• 1881697

• References
• Source

• Patent Number

  1,881,697

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1932
  92 years ago

• CPC

  • C09B1/205 - Dyes with an unsaturated C on the N atom attached to the nucleus

• US Classifications

  • 552 - Organic compounds