1933642

Information

• Patent Grant
• 1933642

• References
• Source

• Patent Number

  1,933,642

• Date Filed

  Not available

• Date Issued

  Tuesday, November 7, 1933
  91 years ago

• CPC

  • C07C49/433 - the condensed ring system containing seven carbon atoms
  • C07C45/292 - with chromium derivatives

• US Classifications

  • 568 - Organic compounds