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Current content: 159 515 718 patent documents

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154 531 new documents added

1 078 520 documents amended

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EP 0005279 B1 19810701 - HOT CATHODE

Title (en)

HOT CATHODE

Publication

EP 0005279 B1 19810701 (DE)

Application

EP 79200056 A 19790202

Priority

CH 489078 A 19780505

Abstract (en)

[origin: US4274030A] A reaction thermionic cathode of the diffusion type on the basis of an activated high-temperature support metal doped with a diffusion-promoting additive for the activator substance, provided with a barrier layer inhibiting the self-diffusion of this additive in an undesired direction.

IPC 1-7

H01J 1/28; H01J 1/14

IPC 8 full level

H01J 1/14 (2006.01); H01J 1/15 (2006.01); H01J 1/28 (2006.01)

CPC (source: EP US)

H01J 1/14 (2013.01 - EP US); H01J 1/28 (2013.01 - EP US)

Designated contracting state (EPC)

DE FR GB NL

DOCDB simple family (publication)

EP 0005279 A2 19791114; EP 0005279 A3 19791212; EP 0005279 B1 19810701; AT 367567 B 19820712; AT A82879 A 19811115; CH 629033 A5 19820331; DE 2822614 A1 19791108; DE 2960432 D1 19811008; JP S54146951 A 19791116; US 4274030 A 19810616

DOCDB simple family (application)

EP 79200056 A 19790202; AT 82879 A 19790205; CH 489078 A 19780505; DE 2822614 A 19780524; DE 2960432 T 19790202; JP 5094479 A 19790426; US 2664979 A 19790403