US4969904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bone implant
Assignee: Zimmer GmbH
•
Filing: 1989-02-08
•
Granted: 1990-11-13
•
Expires: 2009-02-08
Abstract
Abstract The wire mesh is welded to the metal substrate via step-like protuberances formed on the outer surface of the substrate. The wire mesh is permanently deformed in the regions over the protuberances to facilitate forming of spot welds while the remainder of the mesh outside the zones of the protuberances remains porous for the intake of bone cement or the ingrowth of bone tissue.
Inventors
- 👤 Rudolf Koch
- 👤 Erhard Heisig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:18
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/3094; A61F2002/30001; A61F2002/30003; A61F2002/30004; A61F2002/30011; A61F2002/30316; A61F2002/30317; A61F2002/30327; A61F2002/30329; A61F2002/30451; A61F2002/30909; A61F2002/30914; A61F2002/30915; A61F2002/30929; A61F2/46; A61F2002/4631; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0039; A61F2310/00; A61F2310/00389; A61F2310/00395
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A bone implant comprising a metal substrate having a plurality of spaced-apart protuberances on an outer surface thereof; a multilayer metal wire mesh disposed over said outer surface, said mesh having compressed sections disposed over said protuberances; and spot welds securing said compressed sections of said mesh to said protuberances and said layers in said compressed sections to each other.
Claim 2
Dependent Claim
60 words
A bone implant comprising a metal substrate having a plurality of spaced-apart protuberances on an outer surface thereof; a multilayer metal wire mesh disposed over said outer surface, said mesh having compressed sections disposed over said protuberances; and spot welds securing said compressed sections of said mesh to said protuberances and said layers in said compressed sections to each other.
Claim 3
Dependent Claim
25 words
A bone implant as set forth in claim 1 wherein said substrate is a shank having said step-like protuberances on at least two opposite sides.
Claim 4
Dependent Claim
18 words
A bone implant as set forth in claim 2 wherein said mesh is circumferentially disposed around said shank.
Claim 5
Dependent Claim
73 words
A bone implant comprising a metal substrate having a plurality of spaced apart protuberances on an outer surface thereof; a multilayer metal wire mesh disposed over said surface and said projections, said mesh having compressed sections disposed over said protuberances and uncompressed sections disposed over said surface between said protuberances; and spot welds securing said compressed sections of said mesh to said protuberances and said layers in said compressed sections to each other.
Claim 6
Dependent Claim
73 words
A bone implant comprising a metal substrate having a plurality of spaced apart protuberances on an outer surface thereof; a multilayer metal wire mesh disposed over said surface and said projections, said mesh having compressed sections disposed over said protuberances and uncompressed sections disposed over said surface between said protuberances; and spot welds securing said compressed sections of said mesh to said protuberances and said layers in said compressed sections to each other.
Claim 7
Dependent Claim
24 words
A bone implant as set forth in claim 4 wherein said substrate is a shank having said protuberances on at least two opposite sides.
Claim 8
Dependent Claim
18 words
A bone implant as set forth in claim 5 wherein said mesh is circumferentially disposed around said shank.
Claim 9
Dependent Claim
23 words
A bone implant as set forth in claim 4 wherein said mesh has layers of increasing mesh size outwardly of said substrate surface.
Claim 10
Dependent Claim
19 words
A bone implant as set forth in claim 4 wherein said compressed sections of said mesh are permanently deformed.
Claim 11
Dependent Claim
91 words
A bone implant comprising a metal substrate having a recessed outer surface and a plurality of spaced apart protuberances on said outer surfaces; a multilayer metal wire mesh disposed over said surface and said projections, said mesh having compressed sections disposed over said protuberances and uncompressed sections disposed over an in contact with said surface between said protuberances for the ingrowth of bone tissue into said uncompressed sections; and spot welds securing said compressed sections of said mesh to said protuberances and individual layers in said compressed sections to each other.
Claim 12
Dependent Claim
91 words
A bone implant comprising a metal substrate having a recessed outer surface and a plurality of spaced apart protuberances on said outer surfaces; a multilayer metal wire mesh disposed over said surface and said projections, said mesh having compressed sections disposed over said protuberances and uncompressed sections disposed over an in contact with said surface between said protuberances for the ingrowth of bone tissue into said uncompressed sections; and spot welds securing said compressed sections of said mesh to said protuberances and individual layers in said compressed sections to each other.
Claim 13
Dependent Claim
18 words
A bone implant as set forth in claim 9 wherein said mesh is circumferentially disposed around said substrate.
Claim 14
Dependent Claim
23 words
A bone implant as set forth in claim 10 wherein said mesh has layers of increasing mesh size outwardly of said substrate surface.
References Cited (Backward Citations)
US4570271A
Cited
FR2548533A1
Cited
GB2142830A
Cited
US4664668A
Cited
US4660755A
Cited
US4636219A
Cited
DE8600970U1
Cited
US4790852A
Cited
US4829152A
Cited
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 |