3681639

Information

• Patent Grant
• 3681639

• References
• Source

• Patent Number

  3,681,639

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1972
  52 years ago

• CPC

  • H01J61/14 - having one or more carbon compounds as the principal constituents
  • H01J17/20 - Selection of substances for gas fillings Specified operating pressure or temperature

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 337 - Electricity: electrothermally or thermally actuated switches