Electric lamp and discharge devices – Discharge devices having an electrode of particular material
Reexamination Certificate
2005-04-12
2005-04-12
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
Discharge devices having an electrode of particular material
C313S491000, C313S630000, C313S633000
Reexamination Certificate
active
06879091
ABSTRACT:
An electron emissive composition comprises a barium tantalate composition in an amount of about 50 to about 95 wt %; and a ferroelectric oxide composition in an amount of about 5 to about 50 wt %, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition. A method for manufacturing an electron emissive composition comprises blending a barium tantalate composition in an amount of about 50 to about 95 wt % with a ferroelectric oxide composition in an amount of about 5 to about 50 wt % to form an electron emissive precursor composition, wherein the weight percents are based on the total weight of the barium tantalate composition and the ferroelectric oxide composition; and sintering the composition at a temperature of about 1000° C. to about 1700° C.
REFERENCES:
patent: 5744905 (1998-04-01), Mehrotra et al.
patent: 6384534 (2002-05-01), Srivastava et al.
Adyam Mukunda Srinivas
Beers William Winder
Comanzo Holly Ann
Midha Vikas
Ramachandran Gopi Chandran
Fletcher Yoder
General Electric Company
Patel Vip
Zimmerman Glenn D.
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