2220678

Information

• Patent Grant
• 2220678

• References
• Source

• Patent Number

  2,220,678

• Date Filed

  Not available

• Date Issued

  Tuesday, November 5, 1940
  84 years ago

• CPC

  • C09F1/00 - Obtaining purification, or chemical modification of natural resins
  • C07B45/02 - of sulfo or sulfonyldioxy groups
  • C07C303/10 - by reaction with sulfur dioxide and halogen or by reaction with sulfuryl halides
  • C07C2101/14 - The ring being saturated
  • C07C2102/42 - The bicyclo ring system contains seven carbon atoms
  • C07C2103/26 - (Hydrogenated) phenanthrenes

• US Classifications

  • 560 - Organic compounds
  • 530 - Chemistry: natural resins or derivatives
  • 562 - Organic compounds