Boring or penetrating the earth – Bit or bit element – Specific or diverse material
Reexamination Certificate
2007-10-30
2007-10-30
Gay, Jennifer H. (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Specific or diverse material
C175S428000
Reexamination Certificate
active
10954122
ABSTRACT:
Cutting elements and bits incorporating such cutting elements are provided. The cutting elements include a substrate having an interface surface over which is formed an ultra hard material layer. A plurality of lands are formed on the interface surface. A plurality of depressions are formed on the lands.
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Shen Yuelin
Svendsen Zan
Zhang Youhe
Andrews David
Christie Parker & Hale, LLP.
Gay Jennifer H.
Smith International Inc.
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