Patent US2504689A successfully refreshed from Google Patents.
Patent US5219363A successfully refreshed from Google Patents.
US5219363A
Expired / Lapsed
US
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Bone implant
Assignee: Zimmer Technology Inc
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Filing: 1989-08-25
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Granted: 1993-06-15
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Expires: 2009-08-25
Abstract
Abstract A bone implant includes a nonmetallic core and a metallic porous surface secured to the nonmetallic core. The nonmetallic core is designed to closely approximate the modulus of elasticity for bone and the metallic porous surface is intimately engaged with bone to enhance bone growth into the metallic porous surface.
Inventors
- 👤 Roy D. Crowninshield
- 👤 Thirumalai N. C. Devanathan
- 👤 Howard C. Price
- 👤 Abner K. Wang
- 👤 Jack E. Parr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/34; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61F2/30907; A61F2/32; A61F2/36; A61F2/3662; A61L27/40; A61L27/44; A61L27/443; A61F2/367; A61F2002/30001; A61F2002/30316; A61F2002/30329; A61F2002/30331; A61F2002/30332; A61F2/3094; A61F2002/30968; A61F2/3609; A61F2002/3611; A61F2002/365; A61F2220/00; A61F2220/0025; A61F2220/0033; A61L2430/00; A61L2430/02; A61L2430/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A femoral hip component adapted to implantation within a femoral canal of a bone, the femoral canal being open at one end in response to resection of a femoral head of the bone, the femoral hip component comprising a nonmetallic core extending into the femoral canal and opposing the wall thereof to substantially fill the femoral canal, the nonmetallic core being flexible to substantially approximate the flexibility of the bone surrounding the femoral canal, and a porous metallic component fixedly secured to the nonmetallic core for disposition at an outer surface of the nonmetallic core in intimate contact with the wall of the femoral canal to accommodate bone growth when the femoral hip component is implanted into the femoral canal, the porous metallic component including a substantially nonporous barrier embedded therein and the nonmetallic core extends into the metallic porous surface component up to but not past the nonporous barrier.
Claim 2
Dependent Claim
150 words
A femoral hip component adapted to implantation within a femoral canal of a bone, the femoral canal being open at one end in response to resection of a femoral head of the bone, the femoral hip component comprising a nonmetallic core extending into the femoral canal and opposing the wall thereof to substantially fill the femoral canal, the nonmetallic core being flexible to substantially approximate the flexibility of the bone surrounding the femoral canal, and a porous metallic component fixedly secured to the nonmetallic core for disposition at an outer surface of the nonmetallic core in intimate contact with the wall of the femoral canal to accommodate bone growth when the femoral hip component is implanted into the femoral canal, the porous metallic component including a substantially nonporous barrier embedded therein and the nonmetallic core extends into the metallic porous surface component up to but not past the nonporous barrier.
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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) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |