3923838

Information

• Patent Grant
• 3923838

• References
• Source

• Patent Number

  3,923,838

• Date Filed

  Not available

• Date Issued

  Tuesday, December 2, 1975
  49 years ago

• CPC

  • C09B5/2418 - only oxygen-containing hetero rings
  • C07C51/16 - by oxidation
  • C07C51/265 - having alkyl side chains which are oxidised to carboxyl groups
  • C07C51/275 - of hydrocarbyl groups
  • C07C51/54 - Preparation of carboxylic acid anhydrides
  • C07C51/56 - from organic acids, their salts, their esters or their halides
  • C07C65/34 - polycyclic

• US Classifications

  • 549 - Organic compounds
  • 562 - Organic compounds