UV depreciation sensor

Details UV depreciation sensor UV depreciation sensor

2004-05-20

2009-02-03

Guharay, Karabi (Department: 2889)

Electric lamp and discharge devices

With gas or vapor

Envelope with particular structure

C313S634000, C313S493000

Reexamination Certificate

active

07486025

ABSTRACT:
A lamp having a measurable ultra violet light emission and having thereon a first marking revealing at least the operating characteristics of said lamp and a second marking evidencing a change in characteristics in response to exposure to ultra violet emissions. In a preferred embodiment of the invention a symbol or other indicia is provided on the lamp as the second marking that fades in accordance with the number of hours the lamp is operating, thus providing an indication of the UV output of the lamp.

REFERENCES:
patent: 4147823 (1979-04-01), Lavallee
patent: 4744012 (1988-05-01), Bergkvist
patent: 4991074 (1991-02-01), Kobayashi et al.
patent: 5965983 (1999-10-01), Bouwkamp-Wijnoltz
patent: 6149839 (2000-11-01), Diaz et al.
patent: 6504305 (2003-01-01), Ohkubo et al.
patent: 03291540 (1991-12-01), None

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