US4279042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hip prosthesis
Assignee: Rush Presbyterian St Lukes Medical Center
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Filing: 1979-11-26
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Granted: 1981-07-21
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Expires: 1999-11-26
Abstract
Abstract A femoral insert for a hip joint prosthesis wherein the proximal and distal portions are angularly joined to define a lateral apex, the apical height of which has a particular ratio to the medial length of the insert.
Inventors
- 👤 Thomas P. Andriacchi
- 👤 Jorge O. Galante
- 👤 Steven J. Hampton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:23
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/3672; A61F2/3676; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30138; A61F2002/30153; A61F2002/30154; A61F2002/30316; A61F2002/30535; A61F2002/30604; A61F2002/30616; A61F2002/3678; A61F2002/3686; A61F2/46; A61F2002/4631; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0017; A61F2230/0019; A61F2230/0021
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A femoral insert for a hip joint prosthesis, comprising a convex spherical head axially secured to a collarless elongated neck and a stem secured to said neck opposite from said head, said stem including a proximal portion having a proximal medial endpoint, and a distal portion having a distal medial endpoint, said proximal portion and said distal portion being angularly joined to define a lateral apex having an apical height, said proximal medial endpoint and said distal medial endpoint defining a medial length, the ratio of said apical height to said medial length being greater than about 0.35.
Claim 2
Dependent Claim
98 words
A femoral insert for a hip joint prosthesis, comprising a convex spherical head axially secured to a collarless elongated neck and a stem secured to said neck opposite from said head, said stem including a proximal portion having a proximal medial endpoint, and a distal portion having a distal medial endpoint, said proximal portion and said distal portion being angularly joined to define a lateral apex having an apical height, said proximal medial endpoint and said distal medial endpoint defining a medial length, the ratio of said apical height to said medial length being greater than about 0.35.
Claim 3
Dependent Claim
25 words
A femoral insert in accordance with claim 1 wherein said ratio between said apical height and said medial length is between about 0.35 and 0.42.
Claim 4
Dependent Claim
25 words
A femoral insert in accordance with claim 1 wherein said stem is generally rectangular in cross-section, and said proximal portion has a generally constant cross-section.
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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |