1999996

Information

• Patent Grant
• 1999996

• References
• Source

• Patent Number

  1,999,996

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1935
  89 years ago

• CPC

  • C09B3/06 - Preparation from starting materials already containing the benzanthrone nucleus

• US Classifications

  • 552 - Organic compounds