1857553

Information

• Patent Grant
• 1857553

• References
• Source

• Patent Number

  1,857,553

• Date Filed

  Not available

• Date Issued

  Tuesday, May 10, 1932
  92 years ago

• CPC

  • C09B5/06 - Benzanthronyl-pyrazolanthrone condensation products

• US Classifications

  • 546 - Organic compounds