3253894

Information

• Patent Grant
• 3253894

• References
• Source

• Patent Number

  3,253,894

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1966
  58 years ago

• CPC

  • H01J9/04 - of thermionic cathodes
  • H01J61/0672 - characterised by the construction of the electrode
  • Y10T428/12319 - Composite
  • Y10T428/12333 - Helical or with helical component
  • Y10T428/12833 - Alternative to or next to each other

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 313 - Electric lamp and discharge devices