Electric lamp and discharge devices – With optical device or special ray transmissive envelope – Polarizer or special ray transmission
Reexamination Certificate
2005-03-01
2005-03-01
Patel, Ashok (Department: 2879)
Electric lamp and discharge devices
With optical device or special ray transmissive envelope
Polarizer or special ray transmission
C313S573000, C313S635000
Reexamination Certificate
active
06861787
ABSTRACT:
An ultraviolet ray lamp includes a discharge vessel made of quartz glass, filled with a filling. A pair of electrodes is able to generate a discharge in the discharge vessel. An optical filter made of metal oxide, which is partly formed on the outer surface of the discharge vessel, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength. Furthermore, A device for generating ultraviolet rays includes an ultraviolet ray lamp generating ultraviolet rays including short and long wavelength, having a discharge vessel made of quartz glass. An enclosure accommodates the discharge vessel, transmitting at least ultraviolet ray of short wavelength. An optical filter made of metal oxide, which is partly formed on at least one side of the surface of the enclosure, transmits ultraviolet rays of long wavelength and cuts off ultraviolet rays of short wavelength. An ultraviolet ray lamp or a device for generating ultraviolet rays may be used for a sterilizer, an apparatus for treating fluid, or an air cleaner.
REFERENCES:
patent: 3624444 (1971-11-01), Berthold et al.
patent: 5619096 (1997-04-01), Kaliszewski et al.
patent: 5753999 (1998-05-01), Roozekrans et al.
patent: 5801482 (1998-09-01), Verhaar et al.
Ishizaki Ariyoshi
Matsuda Ryoutarou
Saito Akiko
Patel Ashok
Pillsbury & Winthrop LLP
Toshiba Lighting & Technology Corporation
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