Abrasive tool making process – material – or composition – With inorganic material – Metal or metal oxide
Reexamination Certificate
2008-04-29
2010-11-30
Green, Anthony J (Department: 1793)
Abrasive tool making process, material, or composition
With inorganic material
Metal or metal oxide
C051S307000, C175S374000, C175S435000
Reexamination Certificate
active
07842111
ABSTRACT:
Embodiments of the present invention relate to PDCs including a PCD table having an exterior cutting region that exhibits enhanced thermal stability. In one embodiment, a method comprises forming an assembly including a first region having non-diamond carbon material and a second region having a plurality of diamond particles. The method comprises subjecting the assembly to heat and pressure sufficient to form the PDC. In another embodiment, a PDC comprises a substrate and a PCD table bonded to the substrate. The PCD table comprises an exterior cutting region including a plurality of elongated diamond grains that are generally randomly oriented. The PCD table comprises a main region positioned between the substrate and exterior cutting region, and including a plurality of bonded diamond grains. In another embodiment, the first region may include coarse-sized diamond particles instead of non-diamond carbon material.
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Green Anthony J
Parvini Pegah
US Synthetic Corporation
Workman Nydegger
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