US4718914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal bone implant
Assignee: Sulzer AG
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Filing: 1986-01-22
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Granted: 1988-01-12
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Expires: 2006-01-22
Abstract
Abstract The prosthesis consists of a sheet metal shell which is formed of two shell parts or half shells to form a closed hollow body. The thickness of the hollow body is in the range of from 1 to 3 millimeters. In addition, the hollow body may be provided with internal supporting elements to rigidify the shell and/or with a filling of an elastic or plastic material.
Inventors
- 👤 Otto Frey
- 👤 Manfred Semlitsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:56
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3609; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30125; A61F2002/30316; A61F2002/30329; A61F2002/30451; A61F2002/30535; A61F2002/30563; A61F2002/30593; A61F2/3094; A61F2002/30975; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
41 words
A metal bone implant having at least in part a sheet-metal shell defining a substantially rigid closed hollow body with an exterior surface, said shell having a substantially constant wall thickness along said surface and sufficient to render said shell self-supporting.
Claim 2
Dependent Claim
41 words
A metal bone implant having at least in part a sheet-metal shell defining a substantially rigid closed hollow body with an exterior surface, said shell having a substantially constant wall thickness along said surface and sufficient to render said shell self-supporting.
Claim 3
Dependent Claim
24 words
A metal bone implant as set forth in claim 1 wherein said wall thickness is in the range of from 1 to 3 millimeters.
Claim 4
Dependent Claim
26 words
A metal bone implant as set forth in claim 2 which further includes at least one supporting element internally of said body to rigidify said shell.
Claim 5
Dependent Claim
20 words
A metal bone implant as set forth in claim 3 which further includes an elastic material filling said hollow body.
Claim 6
Dependent Claim
19 words
A metal bone implant as set forth in claim 4 wherein said shell is made of a superplastic material.
Claim 7
Dependent Claim
26 words
A metal bone implant as set forth in claim 1 which further includes at least one supporting element internally of said body to rigidify said shell.
Claim 8
Dependent Claim
20 words
A metal bone implant as set forth in claim 1 which further includes an elastic material filling said hollow body.
Claim 9
Dependent Claim
44 words
A metal bone implant having a pair of sheet metal parts secured together along a peripheral seam to define a substantially rigid closed hollow body with a contoured exterior surface, said body having a substantially constant wall thickness sufficient to render said body self-supporting.
Claim 10
Dependent Claim
44 words
A metal bone implant having a pair of sheet metal parts secured together along a peripheral seam to define a substantially rigid closed hollow body with a contoured exterior surface, said body having a substantially constant wall thickness sufficient to render said body self-supporting.
Claim 11
Dependent Claim
24 words
A metal bone implant as set forth in claim 8 wherein said wall thickness is in the range of from 1 to 3 millimeters.
Claim 12
Dependent Claim
20 words
A metal bone implant as set forth in claim 8 which further includes an elastic material filling said hollow body.
Claim 13
Dependent Claim
21 words
A metal bone implant as set forth in claim 8 wherein each said part is made of a alpha/beta titanium alloy.
Claim 14
Dependent Claim
37 words
A metal bone implant as set forth in claim 8 wherein said parts define a joint head, a neck extending from said joint head and a shank extending from said neck to form a femur head prosthesis.
Claim 15
Dependent Claim
41 words
A metal bone implant as set forth in claim 8 wherein one of said parts is disposed within the other of said parts and forms a socket cavity and said other part forms an outer surface for a hip joint socket.
Claim 16
Dependent Claim
53 words
A femur head prosthesis having a pair of sheet-metal shells joined together to define a substantially rigid closed hollow body with an exterior surface defining a joint head, a neck extending from said joint head and a shank extending from said neck, said shells having a substantially constant wall thickness along said surface.
Claim 17
Dependent Claim
53 words
A femur head prosthesis having a pair of sheet-metal shells joined together to define a substantially rigid closed hollow body with an exterior surface defining a joint head, a neck extending from said joint head and a shank extending from said neck, said shells having a substantially constant wall thickness along said surface.
Claim 18
Dependent Claim
24 words
A femur head prosthesis as set forth in claim 14 wherein said wall thickness is in the range of from 1 to 3 millimeters.
Claim 19
Dependent Claim
26 words
A femur head prosthesis as set forth in claim 14 which further includes at least one supporting element internally of said body to rigidify said shell.
Claim 20
Dependent Claim
20 words
A femur head prosthesis as set forth in claim 14 which further includes an elastic material filling said hollow body.
References Cited (Backward Citations)
US3064645A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |