IPC Subgroup
H01J 17/26 Means for producing, introducing, or replenishing gas or vapour during operation of the tube
Introduced: September 1968
Last revised: January 2012
Full Title
Gas-filled discharge tubes with solid cathodes > Details > Means for obtaining or maintaining the desired pressure within the tube > Means for producing, introducing, or replenishing gas or vapour during operation of the tube
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRIC ELEMENTS
- Subclass:
- ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS