3431615

Information

• Patent Grant
• 3431615

• References
• Source

• Patent Number

  3,431,615

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1969
  55 years ago

• CPC

  • H01J9/04 - of thermionic cathodes
  • B23K35/005 - at least one of the workpieces being of a refractory metal
  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J2893/0022 - Manufacture

• US Classifications

  • 445 - Electric lamp or space discharge component or device manufacturing
  • 228 - Metal fusion bonding
  • 313 - Electric lamp and discharge devices