1897427

Information

• Patent Grant
• 1897427

• References
• Source

• Patent Number

  1,897,427

• Date Filed

  Not available

• Date Issued

  Tuesday, February 14, 1933
  92 years ago

• CPC

  • C09B3/64 - Preparation from starting materials already containing the anthanthrone nucleus

• US Classifications

  • 552 - Organic compounds