3801817

Information

• Patent Grant
• 3801817

• References
• Source

• Patent Number

  3,801,817

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1974
  50 years ago

• CPC

  • H01J9/2272 - Devices for carrying out the processes
  • H01J29/182 - acting upon the lighting-up of the luminescent material other than by the composition of the luminescent material
  • H01J29/187 - screens with more than one luminescent material (as mixtures for the treatment of the screens)
  • H01J29/24 - Supports for luminescent material
  • H01J29/34 - provided with permanent marks or references
  • H01J2231/121 - Means for indicating the position of the beam

• US Classifications

  • 250 - Radiant energy
  • 313 - Electric lamp and discharge devices