Boring or penetrating the earth – Bit or bit element – Rolling cutter bit or rolling cutter bit element
Reexamination Certificate
2004-08-12
2008-08-26
Thompson, Kenneth (Department: 3672)
Boring or penetrating the earth
Bit or bit element
Rolling cutter bit or rolling cutter bit element
C175S426000, C076S108400
Reexamination Certificate
active
07416035
ABSTRACT:
A shaped insert that includes a top portion, and a grip length, wherein the grip length is modified to have a non-uniform cross sectional area is disclosed. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is modified such that the insert is non-cylindrical. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is coated in a non-uniform manner.
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Cawthorne Chris E.
Griffo Anthony
Richman Lance T.
Viswanadham Ramamurthy
Osha & Liang LLP
Smith International Inc.
Thompson Kenneth
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