3808043

Information

• Patent Grant
• 3808043

• References
• Source

• Patent Number

  3,808,043

• Date Filed

  Not available

• Date Issued

  Tuesday, April 30, 1974
  50 years ago

• CPC

  • H01J9/08 - Manufacture of heaters for indirectly-heated cathodes
  • Y10T428/2944 - Free metal in coating
  • Y10T428/2949 - Glass, ceramic or metal oxide in coating

• US Classifications

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