2217421

Information

• Patent Grant
• 2217421

• References
• Source

• Patent Number

  2,217,421

• Date Filed

  Not available

• Date Issued

  Tuesday, October 8, 1940
  85 years ago

• CPC

  • H01J61/302 - characterised by the material of the vessel
  • C03C27/02 - by fusing glass directly to metal
  • H01J5/26 - between insulating and conductive parts of vessel
  • H01J13/10 - Containers for the liquid pool Arrangements or mounting thereof
  • H01J2893/0043 - Glass-to-metal or quartz-to-metal
  • H01J2893/0077 - Cathodic cup construction Cathodic spot control

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 220 - Receptacles
  • 420 - Alloys or metallic compositions
  • 501 - Compositions: ceramic