2172784

Information

• Patent Grant
• 2172784

• References
• Source

• Patent Number

  2,172,784

• Date Filed

  Not available

• Date Issued

  Tuesday, September 12, 1939
  85 years ago

• CPC

  • C10G17/10 - recovery of used refining agents

• US Classifications

  • 208 - Mineral oils: processes and products