High intensity discharge lamps, arc tubes, and methods of manufacture
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United States of America Patent
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Aug 11, 2009
Grant Date -
Jan 19, 2006
app pub date -
Jul 13, 2005
filing date -
Jul 13, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present application discloses high intensity discharge (“HID”) lamps, arc tubes, and methods of manufacture. The application relates to HID lamps, arc tubes, and methods of manufacture wherein a precise amount of fill gas may be contained in the light-emitting chamber of the arc tube so that the pressure of the fill gas contained in the arc tube at substantially room temperature may be precisely controlled at pressures greater than about one-half atmosphere.
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