Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2005-10-12
2010-06-01
Stephenson, Daniel P (Department: 3676)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S420200
Reexamination Certificate
active
07726421
ABSTRACT:
Thermally stable diamond-bonded compacts include a diamond-bonded body having a thermally stable region extending a distance below a diamond-bonded body surface. The thermally stable region comprises a matrix first phase of bonded together diamond crystals, and a second phase interposed within the matrix phase. At least some population of the second phase comprises a reaction product formed between an infiltrant material and the diamond crystals at high pressure/high temperature conditions. The diamond bonded body further includes a polycrystalline diamond region that extends a depth from the thermally stable region and has a microstructure comprising a polycrystalline diamond matrix phase and a catalyst material disposed within interstitial regions of the matrix phase. The compact includes a substrate attached to the diamond-bonded body.
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Connolly Bove & Lodge & Hutz LLP
Smith International Inc.
Stephenson Daniel P
LandOfFree
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