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PCE
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DIFF Subgroup
H01J 41/12

Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps

Introduced: July 1974

Full Title

Full titles differ between systems:

IPC:

Discharge tubes and means integral therewith for measuring gas pressure; Discharge tubes for evacuation by diffusion of ions > Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps

CPC:

Discharge tubes for measuring pressure of introduced gas ; Discharge tubes for evacuation by diffusion of ions > Discharge tubes for evacuating by diffusion of ions, e.g. ion pumps, getter ion pumps

IPC and CPC are identically structured here. All 2 subcodes exist in both systems.

IPC defines codes here since 1974.

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