US5984905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-irritating antimicrobial coating for medical implants and a process for preparing same
Assignee: Southwest Research Institute
•
Filing: 1997-03-18
•
Granted: 1999-11-16
•
Expires: 2017-03-18
Abstract
Abstract The present invention provides a process of forming an antimicrobial coating on a surface of a medical implant, the coating comprising an antimicrobially effective amount of antimicrobial metal atoms incorporated into a coating of amorphous carbonaceous material.
Inventors
- 👤 Geoffrey Dearnaley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:56
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/303; A61L27/306; C; C23; C23C; C23C14/00; C23C14/06; C23C14/0605; C23C16/00; C23C16/22; C23C16/26; C23C16/44; C23C16/48; C23C16/486; A61F; A61F2310/00; A61F2310/00389; A61F2310/00574
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
72 words
A medical implant comprising a substrate bearing an amorphous diamond-like carbon coating comprising elements other than silicon and comprising atoms of an antimicrobial metal selected from the group consisting of silver, gold, and combinations thereof sufficiently dispersed in said diamond like carbon to provide controlled release of said metal from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 2
Dependent Claim
72 words
A medical implant comprising a substrate bearing an amorphous diamond-like carbon coating comprising elements other than silicon and comprising atoms of an antimicrobial metal selected from the group consisting of silver, gold, and combinations thereof sufficiently dispersed in said diamond like carbon to provide controlled release of said metal from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said amorphous diamond-like carbon coating consists essentially of said atoms of said antimicrobial metal dispersed in said diamond like carbon.
Claim 4
Dependent Claim
29 words
The medical implant of claim 1 wherein said substrate comprises a material selected from the group consisting of metal alloys, polyethylenes, polymers of ether and ketone monomers, and ceramics.
Claim 5
Dependent Claim
77 words
A medical implant comprising a substrate bearing an amorphous diamond-like carbon coating comprising elements other than silicon and comprising a dispersion of atoms of an antimicrobial metal in said diamond-like carbon wherein said antimicrobial metal atoms are sufficiently dispersed in and surrounded by said diamond like carbon to provide controlled release of said metal from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 6
Dependent Claim
77 words
A medical implant comprising a substrate bearing an amorphous diamond-like carbon coating comprising elements other than silicon and comprising a dispersion of atoms of an antimicrobial metal in said diamond-like carbon wherein said antimicrobial metal atoms are sufficiently dispersed in and surrounded by said diamond like carbon to provide controlled release of said metal from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 7
Dependent Claim
26 words
The method of claim 4 wherein said amorphous diamond-like carbon coating consists essentially of said atoms of said antimicrobial metal dispersed in said diamond like carbon.
Claim 8
Dependent Claim
29 words
The medical implant of claim 4 wherein said substrate comprises a material selected from the group consisting of metal alloys, polyethylenes, polymers of ether and ketone monomers, and ceramics.
Claim 9
Dependent Claim
70 words
A medical implant comprising an amorphous diamond-like carbon coating comprising elements other than silicon and comprising a dispersion of atoms of silver in said diamond like carbon wherein said silver atoms are sufficiently dispersed in said diamond like carbon coating to provide controlled release of said silver from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 10
Dependent Claim
70 words
A medical implant comprising an amorphous diamond-like carbon coating comprising elements other than silicon and comprising a dispersion of atoms of silver in said diamond like carbon wherein said silver atoms are sufficiently dispersed in said diamond like carbon coating to provide controlled release of said silver from said coating at a rate effective to impart antimicrobial protection, but insufficient to irritate tissue which comes into contact with said surface.
Claim 11
Dependent Claim
26 words
The method of claim 7 wherein said amorphous diamond-like carbon coating consists essentially of said atoms of said antimicrobial metal dispersed in said diamond like carbon.
Claim 12
Dependent Claim
29 words
The medical implant of claim 7 wherein said substrate comprises a material selected from the group consisting of metal alloys, polyethylenes, polymers of ether and ketone monomers, and ceramics.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |