US4224698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acetabular cup for total hip replacements
Assignee: Individual
•
Filing: 1979-04-05
•
Granted: 1980-09-30
•
Expires: 1999-04-05
Abstract
Abstract An acetabular cup for total hip replacements is disclosed which provides radiographically opaque elements for the two halves of the periphery of the cup, said opaque elements having different configurations so that it is possible from an anterior-posterior radiographic view to determine whether the cup is facing anteriorly or posteriorly.
Inventors
- 👤 Clark N. Hopson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:19
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/34; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2/30767; A61F2/30771; A61F2002/3082; A61F2002/3241; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
113 words
In an acetabular cup for total hip replacement, having a locating hole in the face of said cup at the top; a radiographic marker system making possible the determination from an anterior-posterior radiographic view of the hip whether the cup is facing anteriorly or posteriorly, comprising a radiographically impervious element along one half of the open periphery of said cup beginning opposite said locating hole, and a radiographically impervious element along the other one half of the periphery of said cup, the configuration of the impervious elements along the two halves of the open periphery of said cup being different, allowing differentiation by X-ray of the anterior and posterior halves of the cup.
Claim 2
Dependent Claim
113 words
In an acetabular cup for total hip replacement, having a locating hole in the face of said cup at the top; a radiographic marker system making possible the determination from an anterior-posterior radiographic view of the hip whether the cup is facing anteriorly or posteriorly, comprising a radiographically impervious element along one half of the open periphery of said cup beginning opposite said locating hole, and a radiographically impervious element along the other one half of the periphery of said cup, the configuration of the impervious elements along the two halves of the open periphery of said cup being different, allowing differentiation by X-ray of the anterior and posterior halves of the cup.
Claim 3
Dependent Claim
37 words
A device according to claim 1, wherein the impervious element along one half of the periphery is a single metallic wire, and the impervious element along the other half of the periphery comprises two metallic wires side-by-side.
Claim 4
Dependent Claim
25 words
A device according to claim 1, wherein the impervious element comprises a metallic wire making one and one-half turns around the periphery of said cup.
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) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |