3389285

Information

• Patent Grant
• 3389285

• References
• Source

• Patent Number

  3,389,285

• Date Filed

  Not available

• Date Issued

  Tuesday, June 18, 1968
  56 years ago

• CPC

  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J19/30 - characterised by the material
  • H01J2893/0019 - Chemical composition and manufacture
  • H01J2893/002 - chemical
  • H01J2893/0023 - carbonising and other surface treatments

• US Classifications

  • 313 - Electric lamp and discharge devices