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US4969907A
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Metal bone implant
Assignee: Sulzer AG
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Filing: 1985-12-02
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Granted: 1990-11-13
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Expires: 2005-12-02
Abstract
Abstract The bone implant is made of a cobalt-based alloy and can be anchored to a bone through the accretion of tissue. The tissue friendly surface of the implant is provided by a coating and a structural element which is secured to the coating with each of the coating and structural element being made of titanium, tantalum or niobium or an alloy of one or more of these materials.
Inventors
- 👤 Rudolf Koch
- 👤 Otto Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:17
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/38; A61F2/3859; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30136; A61F2002/30316; A61F2002/30329; A61F2002/30451; A61F2/30771; A61F2002/30772; A61F2002/30784; A61F2002/30785; A61F2002/30787; A61F2002/30878; A61F2002/30899; A61F2002/30902; A61F2002/30909; A61F2002/30914; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00419; A61F2310/00491; A61F2310/00544
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
73 words
A metal bone implant comprising a body of a cobalt-based cast alloy having a bearing surface and a second surface for exposure to an accretion of tissue; a tissue-friendly metal coating on said second surface selected from the group consisting of titanium, tantalum, niobium and alloys thereof; and a structural element secured to said coating and being of a tissue-friendly metal selected from the group consisting of titanium, tantalum, niobium and alloys thereof.
Claim 2
Dependent Claim
73 words
A metal bone implant comprising a body of a cobalt-based cast alloy having a bearing surface and a second surface for exposure to an accretion of tissue; a tissue-friendly metal coating on said second surface selected from the group consisting of titanium, tantalum, niobium and alloys thereof; and a structural element secured to said coating and being of a tissue-friendly metal selected from the group consisting of titanium, tantalum, niobium and alloys thereof.
Claim 3
Dependent Claim
21 words
A metal bone implant as set forth in claim 1 wherein said coating has a thickness of at least 0.05 millimeters.
Claim 4
Dependent Claim
24 words
A metal bone implant as set forth in claim 2 wherein said structural element is secured to said coating through punctiform metallurgical contact points.
Claim 5
Dependent Claim
24 words
A metal bone implant as set forth in claim 1 wherein said structural element is secured to said coating through punctiform metallurgical contact points.
Claim 6
Dependent Claim
66 words
A bone implant comprising a body of a cobalt-based cast alloy having a surface for exposure to an accretion of tissue; a tissue-friendly metal coating on said surface selected from the group consisting of titanium, tantalum, niobium and alloys thereof; and a structural element secured to said coating and being of a tissue-friendly metal selected from the group consisting of titanium, tantalum, niobium and alloys thereof.
Claim 7
Dependent Claim
66 words
A bone implant comprising a body of a cobalt-based cast alloy having a surface for exposure to an accretion of tissue; a tissue-friendly metal coating on said surface selected from the group consisting of titanium, tantalum, niobium and alloys thereof; and a structural element secured to said coating and being of a tissue-friendly metal selected from the group consisting of titanium, tantalum, niobium and alloys thereof.
Claim 8
Dependent Claim
20 words
A bone implant as set forth in claim 5 wherein said coating has a thickness of at least 0.05 millimeters.
Claim 9
Dependent Claim
18 words
A bone implant as set forth in claim 5 wherein said structural element is welded to said coating.
Claim 10
Dependent Claim
24 words
A bone implant as set forth in claim 5 wherein said structural element has a plurality of openings therein for an ingrowth of tissue.
Claim 11
Dependent Claim
19 words
A bone implant as set forth in claim 8 wherein said openings have a minimum dimension of 0.1 millimeter.
Claim 12
Dependent Claim
44 words
A knee joint endoprosthesis comprising a U-shaped body of a cobalt-based alloy having an outer bearing surface; a tissue-friendly metal coating on an inner surface of said body; and a tissue-friendly metal structural element secured to said coating for the accretion of tissue therein.
Claim 13
Dependent Claim
44 words
A knee joint endoprosthesis comprising a U-shaped body of a cobalt-based alloy having an outer bearing surface; a tissue-friendly metal coating on an inner surface of said body; and a tissue-friendly metal structural element secured to said coating for the accretion of tissue therein.
Claim 14
Dependent Claim
34 words
A knee joint prosthesis as set forth in claim 10 wherein each said coating and said structural element is of a metal selected from the group consisting of titanium, tantalum, niobium and alloys thereof.
Claim 15
Dependent Claim
25 words
A knee joint prosthesis as set forth in claim 10 wherein said structural element has a plurality of openings therein for an ingrowth of tissue.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |