2156974

Information

• Patent Grant
• 2156974

• References
• Source

• Patent Number

  2,156,974

• Date Filed

  Not available

• Date Issued

  Tuesday, May 2, 1939
  86 years ago

• CPC

  • H01J17/24 - Means for absorbing or adsorbing gas
  • H01H33/64 - wherein the break is in gas

• US Classifications

  • 218 - High-voltage switches with arc preventing or extinguishing devices
  • 252 - Compositions
  • 313 - Electric lamp and discharge devices
  • 445 - Electric lamp or space discharge component or device manufacturing