Appeal No. 2004-1341
Application No. 09/806,220
drill string element (2) has a second impact surface (7), said
first and second impact surfaces being arranged to abut against
each other, characterized in that said male thread (5) and said
female thread (4) are conical and that the crests (8) of said
male thread (5) have a radius of curvature which is larger than
30% of the pitch of the thread.
THE PRIOR ART
The references relied on by the examiner to support the
final rejection are:
Jansson et al. 4,760,887 Aug. 02, 1988
(Jansson)
Yao 6,196,598 Mar. 06, 2001
Manten, German Patent 1 170 887 May 27, 1964
Document1
THE REJECTIONS
Claim 1 stands rejected under 35 U.S.C. § 103(a) as being
unpatentable over Manten in view of Jansson.
Claims 2 through 4 stand rejected under 35 U.S.C. § 103(a)
as being unpatentable over Manten in view of Jansson and Yao.
Attention is directed to the main and reply briefs (filed
January 20, 2004 and March 15, 2004, respectively) and to the
answer (mailed February 19, 2004) for the respective positions of
1 The record contains an English language translation of
this reference submitted by the appellant on June 9, 2003.
2
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