Patent US3905777A successfully refreshed from Google Patents.
US3905777A
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Composite and porous metallic members which can be used for bone prosthesis
Assignee: Comptoir Lyon-Alemand Louyot and Cie
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Filing: 1974-01-28
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Granted: 1975-09-16
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Expires: 1994-01-28
Abstract
Abstract A prosthesis comprises a metal member of for example titanium or tantalum and includes a solid core or substrate and a covering of perforated metal of a porous nature. The perforations are preferably arranged in the foil so that when laminated the complete covering has pores of irregular shape. This irregularity assists in the keying of bone substance to the prosthesis. The minimum pore transverse dimension is 50 microns. A method is also described which involves dipping the member into a suspension of the hydride of the member of the core and subsequently heating the core at high temperature.
Inventors
- 👤 Roger Lacroix
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/30767; A61F2/30907; A61L27/02; A61L27/04; A61L27/50; A61L27/56; B; B22; B22F; B22F7/00; B22F7/002; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; C08K3/10; C08K3/12; A61F2/3094; A61F2/32; A61F2/36; A61F2/3662; A61F2002/30001; A61F2002/30108; A61F2002/3011; A61F2002/30112; A61F2002/30138; A61F2002/30156; A61F2002/30158; A61F2002/30316; A61F2002/30329; A61F2002/30451; A61F2002/30909; A61F2002/30912; A61F2002/30929; A61F2/34; A61F2002/3429; A61F2/3609; A61F2002/3625; A61F2002/3631; A61F2220/00; A61F2220/0025; A61F2220/0058; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0017; A61F2230/0023; A61F2230/0026; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00035; A61F2310/00131; A61F2310/00389; A61F2310/00395; A61F2310/00407; A61F2310/00419; A61F2310/00544; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10T; Y10T428/00; Y10T428/12; Y10T428/12014; Y10T428/12028; Y10T428/12042; Y10T428/12063; Y10T428/12069; Y10T428/12076; Y10T428/12361; Y10T428/12431; Y10T428/12438; Y10T428/12444; Y10T428/12493; Y10T428/12771; Y10T428/12806; Y10T428/12812
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
82 words
A COMPOSITE METALLIC MEMBER COMPRISING A CORE, AND A POROUS COVERING WELDED TO THE CORE, SAID COVERING HAVING A THICKNESS BETWEEN 5 AND 50% OF THE MAXIMUM TRANSVERSE DIMINSION OF THE CORE AND SAID COVERING COMPRISING A PLURALITY OF LAYERS OF FOIL, THE FOIL HAVING A THICKNESS BETWEEN 0.05 AND 0.5 MM. AND HAVING PERFORATIONS, THE COVERING BEING FORMED BY WELDING THE FOIL LAYERS SO THAT THE PERFORATIONS TOGETHER FORM PASSAGES OF WHICH THE MINIMUM TRANSVERSE DIMENSION IS AT LEAST 50 MICRONS.
Claim 2
Dependent Claim
82 words
A COMPOSITE METALLIC MEMBER COMPRISING A CORE, AND A POROUS COVERING WELDED TO THE CORE, SAID COVERING HAVING A THICKNESS BETWEEN 5 AND 50% OF THE MAXIMUM TRANSVERSE DIMINSION OF THE CORE AND SAID COVERING COMPRISING A PLURALITY OF LAYERS OF FOIL, THE FOIL HAVING A THICKNESS BETWEEN 0.05 AND 0.5 MM. AND HAVING PERFORATIONS, THE COVERING BEING FORMED BY WELDING THE FOIL LAYERS SO THAT THE PERFORATIONS TOGETHER FORM PASSAGES OF WHICH THE MINIMUM TRANSVERSE DIMENSION IS AT LEAST 50 MICRONS.
Claim 3
Dependent Claim
70 words
A member according to claim 1, wherein the metal of the core and covering is selected from the group titanium, tantalum, alloys of titanium, alloys of tantalum and Vitallium, the latter being an alloy, on a percent by weight basis, of: 25.5-30 Cr, 5-7 Mo, up to 0.35 C, up to 1.0 Mn, up to 1.0 Si, up to 2.0 Fe, up to 3.75 Ni, with the balance being Co.
Claim 4
Dependent Claim
12 words
A member according to claim 1 wherein the said passages are irregular.
Claim 5
Dependent Claim
15 words
A member according to claim 1 wherein the foil takes the form of expanded metal.
Claim 6
Dependent Claim
23 words
A member according to claim 1, wherein the covering is in the form of a sheet of annealed foil formed into a laminate.
Claim 7
Dependent Claim
33 words
A member according to claim 1, comprising fine particles of the same metal as the core and covering welded to the surface of the covering and having a diameter less than 10 microns.
Claim 8
Dependent Claim
25 words
A membeR according to claim 1 wherein the thickness of said covering is between 10 and 25% of the maximum transverse distance of the core.
Claim 9
Dependent Claim
12 words
A member according to claim 1 wherein the foil is wire mesh.
Claim 10
Dependent Claim
19 words
A member according to claim 1 wherein each layer of foil has a thickness of 0.1 to 0.25 millimeters.
Claim 11
Dependent Claim
16 words
A member according to claim 1 wherein the metal of the core and covering is titanium.
References Cited (Backward Citations)
US3605123A
Cited
US3808606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |