Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate
2008-08-08
2010-10-19
Patel, Vip (Department: 2889)
Electric lamp and discharge devices
With luminescent solid or liquid material
Vacuum-type tube
C313S491000
Reexamination Certificate
active
07816853
ABSTRACT:
A cathode has an emission layer that thermionically emits electrons upon exposure with a laser beam. The material of the emission layer has a product of density (ρ), measured inkgm3,heat capacity (Cp), measured inJkgKand heat conductivity (λ), measured inWmKthat is, at room temperature, maximally 500,000J2m4K2s.Such a cathode has an improved thermionic emission of electrons.
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patent: 6054801 (2000-04-01), Hunt et al.
patent: 2007/0064872 (2007-03-01), Freudenberger et al.
patent: 2007/0187712 (2007-08-01), Yamada et al.
patent: 2007/0274454 (2007-11-01), Freudenberger et al.
patent: WO 9943870 (1999-09-01), None
Freudenberger Joerg
Fritzler Sven
Fuchs Manfred
Mattern Detlef
Roehrer Peter
Patel Vip
Schiff & Hardin LLP
Siemens Aktiengesellschaft
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