1997980

Information

• Patent Grant
• 1997980

• References
• Source

• Patent Number

  1,997,980

• Date Filed

  Not available

• Date Issued

  Tuesday, April 16, 1935
  90 years ago

• CPC

  • C10G17/10 - recovery of used refining agents
  • Y10S159/18 - Accumulator
  • Y10S159/25 - Decant, press, centrifuge
  • Y10S159/33 - Two liquids, one a heat carrier
  • Y10S159/905 - Sewage treatment

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 122 - Liquid heaters and vaporizers
  • 159 - Concentrating evaporators
  • 208 - Mineral oils: processes and products
  • 422 - Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing