H01J2201/28 - CPC Classification Index

ClassID:

205754 ⎘

H01J2201/28 - CPC Classification

Classification description:

Electrodes common to discharge tubes Heaters for thermionic cathodes

Sub-classes:

H01J2201/2803 » Characterised by the shape or size 3
H01J2201/2889 » Characterised by material 3
H01J2201/2892 » Coatings 0

Recent Application in this class:

20200395185

2020-12-17

Electron gun

20200066474

2020-02-27

CATHODES WITH CONFORMAL CATHODE SURFACES, VACUUM ELECTRONIC DEVICES WITH CATHODES WITH CONFORMAL CATHODE SURFACES, AND METHODS OF MANUFACTURING THE SAME

20090060142

2009-03-05

X-ray tube with enhanced small spot cathode and methods for manufacture thereof