1662970

Information

• Patent Grant
• 1662970

• References
• Source

• Patent Number

  1,662,970

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1928
  96 years ago

• CPC

  • B01J21/08 - Silica
  • C01B17/79 - containing vanadium
  • H01H73/42 - reset by rotatable knob or wheel

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets