Patent US6344276B1 successfully refreshed from Google Patents.
US6344276B1
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US
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Non-dissolvable amorphous Ti-Ca-P coating for implant application
Assignee: National Cheng Kung University
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Filing: 1999-05-19
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Granted: 2002-02-05
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Expires: 2019-05-19
Abstract
Abstract A medical implant coated with an amorphous hydroxyapatite/titanium coating layer having both high coating-substrate bond strength and a low dissolution rate of the coating. The medical implant of the present invention includes a substrate and a surface coating deposited onto the substrate from a composite target comprising 10-75% by volume of titanium and 90-25% by volume of hydroxyapatite.
Inventors
- 👤 Jiin-Huey Chern Lin
- 👤 Chien-Ping Ju
- 👤 Shinn-Jyh Ding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:11
CPC Classifications
A; A61; A61C; A61C8/00; A61C8/0012; A61C8/0013; B; B32; B32B; B32B15/00; B32B15/01; C; C23; C23C; C23C14/00; C23C14/06; C23C14/22; C23C14/34; C23C14/3407; C23C14/3414
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
41 words
A medical implant with a single non-dissolvable amorphous hydroxyapatite/titanium coating comprising: a substrate; and an amorphous HA/Ti surface coating on said substrate, wherein said HA/Ti surface coating has a weight ratio of Ca+P to Ti in the range of approximately 0.1-3.0.
Claim 2
Dependent Claim
41 words
A medical implant with a single non-dissolvable amorphous hydroxyapatite/titanium coating comprising: a substrate; and an amorphous HA/Ti surface coating on said substrate, wherein said HA/Ti surface coating has a weight ratio of Ca+P to Ti in the range of approximately 0.1-3.0.
Claim 3
Dependent Claim
26 words
The medical implant of claim 1 , wherein the weight ratio of Ca+P to Ti in the surface coating is in the range of approximately 0.4-3.0.
Claim 4
Dependent Claim
18 words
The medical implant of claim 1 , wherein the surface coating is less than approximately 10 μm thick.
Claim 5
Dependent Claim
15 words
The medical implant of claim 1 , wherein the substrate is comprised of pure titanium.
Claim 6
Dependent Claim
16 words
The medical implant of claim 1 , wherein the substrate is comprised of a titanium alloy.
Claim 7
Dependent Claim
14 words
The medical implant of claim 1 , wherein the substrate is comprised of Ti—6Al—4V.
Claim 8
Dependent Claim
32 words
The medical implant of claim 1 , wherein the surface coating is deposited onto the substrate from a composite target comprising 10-75% by volume of titanium and 90-25% by volume of hydroxyapatite.
Claim 9
Dependent Claim
23 words
The medical implant of claim 7 , wherein the composite target comprises 10-50% by volume of titanium and 90-50% by volume of hydroxyapatite.
Claim 10
Dependent Claim
23 words
The medical implant of claim 8 , wherein the composite target comprises 10% by volume of titanium and 90% by volume of hydroxyapatite.
Claim 11
Dependent Claim
23 words
The medical implant of claim 8 , wherein the composite target comprises 15% by volume of titanium and 85% by volume of hydroxyapatite.
Claim 12
Dependent Claim
23 words
The medical implant of claim 8 , wherein the composite target comprises 25% by volume of titanium and 75% by volume of hydroxyapatite.
Claim 13
Dependent Claim
23 words
The medical implant of claim 8 , wherein the composite target comprises 50% by volume of titanium and 50% by volume of hydroxyapatite.
Claim 14
Dependent Claim
17 words
The medical implant of claim 7 , wherein the hydroxyapatite component of the composite target is calcinated.
Claim 15
Dependent Claim
31 words
A medical implant comprising a substrate of pure titanium or a titanium alloy; and an amorphous coating on said substrate, wherein said amorphous coating consists essentially of amorphous hydroxyapatite and titanium.
Claim 16
Dependent Claim
31 words
A medical implant comprising a substrate of pure titanium or a titanium alloy; and an amorphous coating on said substrate, wherein said amorphous coating consists essentially of amorphous hydroxyapatite and titanium.
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) | 2005-02-04 | 2005-08-06 | 2006-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-02-04 | 2009-08-06 | 2010-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-02-04 | 2013-08-06 | 2014-02-05 | $7700.00 | Window Closed / Lapsed |