2154278

Information

• Patent Grant
• 2154278

• References
• Source

• Patent Number

  2,154,278

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1939
  85 years ago

• CPC

  • H01J19/30 - characterised by the material
  • H01J2893/0021 - carbon

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 065 - Glass manufacturing
  • 220 - Receptacles
  • 285 - Pipe joints or couplings
  • 427 - Coating processes
  • 445 - Electric lamp or space discharge component or device manufacturing