US6146686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implant material and process for using it
Assignee: OctoPlus Sciences BV
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Filing: 1999-04-23
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Granted: 2000-11-14
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Expires: 2019-04-23
Abstract
Abstract The invention provides a nanotechnology process for implant surface treatment for producing an implant article. The nanotechnology process comprises subjecting a non-porous material to a mechanical or chemical surface treatment until a surface roughness with an average peak distance (Ra value) between 10 and 1,000 nm is obtained. The roughened surface can subsequently be subjected to precipitation of calcium phosphate from a solution containing calcium and phosphate ions.
Inventors
- 👤 Eugenia Ribeiro de Sousa Fildago Leitao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:15
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/32; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61L27/02; A61L27/04; A61L27/06; A61F2002/30001; A61F2002/30667; A61F2002/30677; A61F2002/30906; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00023; A61F2310/00179; A61F2310/00389; A61F2310/00592; A61F2310/00796; A61F2310/0097; A61F2310/00976; A61L2400/00; A61L2400/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
53 words
A process for producing a calcium phosphate coated implantable device, comprising subjecting a porous or non-porous material to a surface treatment until a roughened surface with an average peak distance between about 10 nm and about 1,000 nm is obtained and in vitro coating the surface with a layer of a calcium phosphate.
Claim 2
Dependent Claim
53 words
A process for producing a calcium phosphate coated implantable device, comprising subjecting a porous or non-porous material to a surface treatment until a roughened surface with an average peak distance between about 10 nm and about 1,000 nm is obtained and in vitro coating the surface with a layer of a calcium phosphate.
Claim 3
Dependent Claim
15 words
The process according to claim 1, wherein said surface treatment comprises a mechanical abrading treatment.
Claim 4
Dependent Claim
39 words
The process according to claim 1, wherein said surface treatment comprises a chemical treatment including subjecting the surface to acidic, alkaline or oxidizing solutions or a combination of an acidic solution or an alkaline solution and an oxidizing solution.
Claim 5
Dependent Claim
26 words
The process according to claim 1, wherein the roughened surface is subsequently subjected to precipitation of calcium phosphate from a solution containing calcium and phosphate ions.
Claim 6
Dependent Claim
15 words
The process according to claim 4, wherein said solution has a pH of about 4-10.
Claim 7
Dependent Claim
23 words
A process according to claim 1 comprising treating titanium or a titanium alloy with an acid solution followed immersion in an alkaline solution.
Claim 8
Dependent Claim
21 words
A process according to claim 1 comprising treating porous tantalum with an acid solution followed by immersion in an oxidizing solution.
Claim 9
Dependent Claim
15 words
A process according to claim 5 wherein the pH is about 6 to about 8.
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) | 2003-11-14 | 2004-05-15 | 2004-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-14 | 2008-05-15 | 2008-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-14 | 2012-05-15 | 2012-11-14 | $7700.00 | Window Closed / Lapsed |