3539290

Information

• Patent Grant
• 3539290

• References
• Source

• Patent Number

  3,539,290

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1970
  54 years ago

• CPC

  • C22B23/026 - from spent catalysts
  • C22B11/021 - Recovery of noble metals from waste materials
  • C22B11/042 - Recovery of noble metals from waste materials
  • C22B34/00 - Obtaining refractory metals
  • C22B34/225 - from spent catalysts
  • C22B34/325 - from spent catalysts
  • C22B34/345 - from spent catalysts
  • C22B34/365 - from spent catalysts
  • Y02P10/214 - by pyro metallurgy
  • Y02P10/224 - of Co or Ni
  • Y02P10/23 - of refractory metals

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 502 - Catalyst, solid sorbent, or support therefor: product or process of making