2206691

Information

• Patent Grant
• 2206691

• References
• Source

• Patent Number

  2,206,691

• Date Filed

  Not available

• Date Issued

  Tuesday, July 2, 1940
  84 years ago

• CPC

  • G04B45/0023 - Inscriptions or pictures moved by the clockwork, e.g.for advertising
  • B01J39/02 - Processes using inorganic exchangers
  • C02F5/02 - Softening water by precipitation of the hardness

• US Classifications

  • 210 - Liquid purification or separation
  • 252 - Compositions