Coating processes – Medical or dental purpose product; parts; subcombinations;...
Reexamination Certificate
2007-08-28
2007-08-28
Cameron, Erma (Department: 1762)
Coating processes
Medical or dental purpose product; parts; subcombinations;...
C427S002240, C427S002250, C427S002280, C427S530000, C427S566000, C427S569000
Reexamination Certificate
active
10811485
ABSTRACT:
This invention is a method of forming a nitride layer on at least one metal or metal alloy biomedical device, comprising: providing a vacuum chamber with at least one biomedical device positioned thereon on a worktable within the vacuum chamber; reducing the pressure in the vacuum chamber; introducing nitrogen into the vacuum chamber so that the pressure in the vacuum chamber is about 0.01 to about 10 milli-Torr; generating electrons within the vacuum chamber to form positively charged nitrogen ions; providing a negative bias to the worktable so that the positively charged nitrogen ions contact the biomedical devices under conditions such that a nitride layer forms on the at least one prosthetic device.
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Arps James H.
Booker Thomas L.
Rincon Christopher
Wei Ronghua
Cameron Erma
O'Keefe, Egan & Peterman
Southwest Research Institute
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