US3584318A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial joints for use in surgery
Assignee: NAT RES DEV
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Filing: 1966-01-13
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Granted: 1971-06-15
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Expires: 1986-01-13
Abstract
Abstract A PROSTHESIS USED AS AN ARTIFICIAL JOINT IN THE HUMAN BONE STRUCTURE COMPRISES A BEARING MEMBER ADAPTED TO BE HELD IN A FIXED POSITION BY A CUP-SHAPED SEATING MEMBER WHICH IS ANCHORED TO THE BONE STRUCTURE. THE CONCAVE, SPHERICAL BEARING SURFACE OF THE BEARING MEMBER HAS A RELIEVED PORTION FOR RECEIVING PARTICLES OF ATTRITION FROM THE JOINT MEMBERS FORMED DURING USE OF THE JOINT AND AN OPENING FOR RELEASING THE PARTICLES FROM THE JOINT. A FEMORAL MEMBER WITH A GENERALLY SPHERICAL SHAPED HEAD HAVING A FLAT AREA TO INSURE BETTER WEARING OF THE JOINT IS MOUNTED WITHIN THE BEARING MEMBER.
Inventors
- 👤 John Tracey Scales
- 👤 Ian Duff-Barclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:22
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2002/30001; A61F2002/30316; A61F2002/30317; A61F2002/30324; A61F2002/30329; A61F2002/30331; A61F2002/30476; A61F2002/305; A61F2002/30535; A61F2002/30537; A61F2002/30538; A61F2002/3054; A61F2002/30593; A61F2/34; A61F2002/3401; A61F2002/3429; A61F2/36; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2/3662; A61F2002/3678; A61F2002/3686; A61F2220/00; A61F2220/0025; A61F2220/0033; A61F2250/00; A61F2250/0014; A61F2250/0036; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00029; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32631; Y10T403/32737; Y10T403/32778
Claims Analysis
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References Cited (Backward Citations)
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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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |