Cathode emissive body for an impregnated cathode of an...

Details Cathode emissive body for an impregnated cathode of an... Cathode emissive body for an impregnated cathode of an...

2005-12-27

2005-12-27

Patel, Nimeshkumar D. (Department: 2879)

Electric lamp and discharge devices

Electrode and shield structures

Cathodes containing and/or coated with electron emissive...

C313S3460DC, C313S310000, C313S311000, C313S337000, C313S341000, C445S050000, C445S051000

Reexamination Certificate

active

06979942

ABSTRACT:
Body (1) formed from a porous matrix impregnated with an electron-emitting material, defined by external faces (11, 12, 13) that all have a roughness of less than 0.2 μm.Because of this surface finish, the operation and the lifetime of the cathodes provided with such cathode emissive bodies are substantially improved.

REFERENCES:
patent: 5990608 (1999-11-01), Shiroishi
patent: 0890972 (1999-01-01), None
patent: 1063668 (2000-12-01), None
patent: 1522387 (1978-08-01), None
Patent Abstract of Japan, Nakamura Shinya, Porous Sintered Base, Manufacture Thereof and Method for Evaluating Porosity of Porous Material, Pub #06103885, Pub. Date—Apr. 15, 1994. One Page.
Patent Abstract of Japan, Hatakeyama Junji, Impregnated Type Cathode Body Structure and its Manufacture, Pub #05114352, Pub Date—May 7, 1993. One Page.
Patent Abstract of Japan, Sato Kyoichi, Impregnated Cathode, Pub 60017831, Pub. Date—Jan. 29, 1985. One Page.

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