2249672

Information

• Patent Grant
• 2249672

• References
• Source

• Patent Number

  2,249,672

• Date Filed

  Not available

• Date Issued

  Tuesday, July 15, 1941
  83 years ago

• CPC

  • H01J9/12 - of photo-emissive cathodes of secondary-emission electrodes
  • H01J9/045 - Activation of assembled cathode
  • H01J17/066 - Cold cathodes
  • H01J2893/0066 - Construction, material, support, protection and temperature regulation of electrodes Electrode cups

• US Classifications

  • 445 - Electric lamp or space discharge component or device manufacturing
  • 252 - Compositions
  • 313 - Electric lamp and discharge devices
  • 315 - Electric lamp and discharge devices: systems
  • 362 - Illumination
  • 427 - Coating processes