Alloys or metallic compositions – Containing over 50 per cent metal but no base metal – Chromium containing
Reexamination Certificate
2003-09-05
2011-11-01
Roe, Jessee R. (Department: 1733)
Alloys or metallic compositions
Containing over 50 per cent metal but no base metal
Chromium containing
C148S442000
Reexamination Certificate
active
08048369
ABSTRACT:
A cobalt-nickel-chromium-molybdenum alloy useful in surgical implant applications includes, in weight percent based on total alloy weight, at least 20 cobalt, 33.0 to 37.0 nickel, 19.0 to 21.0 chromium, 9.0 to 10.5 molybdenum, and less than 30 ppm nitrogen. Embodiments of the alloy lack significant levels of titanium nitride and mixed carbonitride inclusions. The alloy may be cold drawn to thin-gauge wire without damage to the die as may be caused by hard particle inclusions in certain conventional alloy formulations.
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Declaration Exhibit 3—Certificate of Tests dated Mar. 13, 1995.
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Bradley David J.
Forbes Jones Robin M.
Lippard Henry E.
Myers Robert J.
Stephenson Timothy A.
ATI Properties Inc.
Grosselin, III John E.
K & L Gates LLP
Roe Jessee R.
Viccaro Patrick J.
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