Patent US4902297A successfully refreshed from Google Patents.
US4902297A
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Composite implant prosthesis
Assignee: Zimmer Technology Inc
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Filing: 1989-06-21
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Granted: 1990-02-20
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Expires: 2009-06-21
Abstract
Abstract A composite implant prosthesis comprising a core constructed from a plurality of carbon fibers, a first casing formed from a braided sheath of carbon fibers and a second casing enclosing the core and first casing to define an outer surface contour for the composite implant prosthesis. The method for constructing the composite implant prosthesis includes the steps of pultruding the core from a polymer impregnated tow, braiding the first casing to the pultruded core and applying the second casing thereto. The pultruding and braiding steps are performed in a continuous process while the second casing is applied to a discrete element formed from the core.
Inventors
- 👤 Thirumalai N. C. Devanathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:20
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3094; A61F2/30965; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2915; Y10T428/2918; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
110 words
A composite implant prosthesis comprising a core formed by a plurality of substantially unidirectional strands of fiber, each fiber extending substantially over the complete length of the core, an inner casing defined by a braided material enclosing the core over its entire length to form a rigid member, and an outer casing enclosing the inner casing and defining an outer surface contour for the composite implant prosthesis, the core and the inner casing defining a substantially uniform width from one end to the other end while the outer casing defines an irregular width from the one end to the other end to accommodate disposition of the prosthesis adjacent a bone.
Claim 2
Dependent Claim
110 words
A composite implant prosthesis comprising a core formed by a plurality of substantially unidirectional strands of fiber, each fiber extending substantially over the complete length of the core, an inner casing defined by a braided material enclosing the core over its entire length to form a rigid member, and an outer casing enclosing the inner casing and defining an outer surface contour for the composite implant prosthesis, the core and the inner casing defining a substantially uniform width from one end to the other end while the outer casing defines an irregular width from the one end to the other end to accommodate disposition of the prosthesis adjacent a bone.
Claim 3
Dependent Claim
37 words
The composite implant prosthesis of claim 1 in which the braided material of the inner casing is partially embedded and integrated into the core to enhance fixation therewith when the inner casing is secured to the cord.
References Cited (Backward Citations)
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US3936336A
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US3893196A
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US4312917A
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US4750905A
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |