3678315

Information

• Patent Grant
• 3678315

• References
• Source

• Patent Number

  3,678,315

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1972
  52 years ago

• CPC

  • H01J61/74 - having a main light-emitting filling of difficult vaporisable metal vapour
  • H01J61/22 - vapour of an alkali metal
  • H01J61/33 - Special shape of cross-section

• US Classifications

  • 313 - Electric lamp and discharge devices