Appeal No. 2001-0573
Application No. 08/638,245
Appellants' invention relates to a method of
manufacturing a cutter for an earth boring drill bit wherein
the cutter has an improved steel-tooth structure with added
toughness in the area of each tooth which is most prone to
cracking and brittleness, i.e., most preferably, at the
relatively sharp corner regions (51, 53, 55, 57) of the cutter
teeth near the base or root of each tooth at the intersection
of the tooth flanks and the ends of the teeth. Independent
claims 1, 5 and 14 are representative of the subject matter on
appeal and a copy of those claims may be found in Appendix I
of appellants' brief.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims under 35 U.S.C. §
103 are:
Scales et al. (Scales) 3,913,988 Oct. 21,
1975
Peck 3,923,348 Dec.
2, 1975
Scott et al. (Scott) 4,726,432 Feb. 23,
1988
2
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