3223878

Information

• Patent Grant
• 3223878

• References
• Source

• Patent Number

  3,223,878

• Date Filed

  Not available

• Date Issued

  Tuesday, December 14, 1965
  59 years ago

• CPC

  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J2893/0024 - Planar grids
  • Y10T29/49801 - Shaping fiber or fibered material
  • Y10T29/4981 - Utilizing transitory attached element or associated separate material
  • Y10T29/49812 - Temporary protective coating, impregnation, or cast layer

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 029 - Metal working
  • 065 - Glass manufacturing
  • 445 - Electric lamp or space discharge component or device manufacturing