Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...
Reexamination Certificate
2004-12-22
2009-10-27
Turner, Archene (Department: 1794)
Stock material or miscellaneous articles
Self-sustaining carbon mass or layer with impregnant or...
C428S332000, C428S469000, C407S119000, C051S307000, C051S309000
Reexamination Certificate
active
07608333
ABSTRACT:
Thermally stable diamond constructions comprise a diamond body having a plurality of bonded diamond crystals, a plurality of interstitial regions disposed among the crystals, and a substrate attached to the body. The body includes a working surface and a side surface extending away from the working surface to the substrate. The body comprises a first region adjacent the side surface that is substantially free of a catalyst material and that extends a partial depth into the diamond body. The first region can further extend to at least a portion of the working surface and a partial depth therefrom into the diamond body. The diamond body can be formed from natural diamond grains and/or a mixture of natural and synthetic diamond grains. A surface of the diamond body is treated to provide the first region, and before treatment is finished to an approximate final dimension.
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Osha & Liang LLP
Smith International Inc.
Turner Archene
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