3646378

Information

• Patent Grant
• 3646378

• References
• Source

• Patent Number

  3,646,378

• Date Filed

  Not available

• Date Issued

  Tuesday, February 29, 1972
  52 years ago

• CPC

  • H01J61/74 - having a main light-emitting filling of difficult vaporisable metal vapour
  • H01J61/34 - Double-wall vessels or containers

• US Classifications

  • 313 - Electric lamp and discharge devices