Stock material or miscellaneous articles – Composite – Of metal
Reexamination Certificate
2008-07-01
2008-07-01
McNeil, Jennifer (Department: 1794)
Stock material or miscellaneous articles
Composite
Of metal
C428S472000, C428S698000, C428S701000, C428S702000
Reexamination Certificate
active
07393589
ABSTRACT:
Coatings for use in artificial joints and other implanted medical devices. The coatings comprise a dual layer structure vapor deposited atop a medical grade substrate, such as cobalt chromium. The dual layer structure comprises a first ceramic layer vapor deposited atop at least a portion of the substrate and a second ceramic layer deposited atop the first ceramic layer. The first ceramic layer is formed of a material which has particularly good adhesion to the substrate, and the second ceramic layer from a material exhibiting particularly high hardness and good wear characteristics. The vapor deposition process is controlled so as to form a graded interface between the two ceramic layers to form a dual layer coating which resists delamination, adheres well to the substrate, and exhibits good wear characteristics in situ.
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Aharonov Robert
Fontana Raymond
Gifford Krass Sprinkle Anderson & Citkowski P.C.
Ionbond, Inc.
McNeil Jennifer
Speer Timothy M
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