Optics: measuring and testing – By dispersed light spectroscopy – With sample excitation
Reexamination Certificate
2011-03-15
2011-03-15
Geisel, Kara E (Department: 2877)
Optics: measuring and testing
By dispersed light spectroscopy
With sample excitation
Reexamination Certificate
active
07907277
ABSTRACT:
Apparatus and method for estimating a property of a downhole fluid including a carrier that is conveyed in a borehole, and a semiconductor electromagnetic energy source carried by the carrier, the semiconductor electromagnetic energy source having an active region that includes one or more nitride-based barrier layers that are modulation-doped using a nitride-based doped layer.
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Baker Hughes Incorporated
Cantor & Colburn LLP
Geisel Kara E
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