Patent US4848884A successfully refreshed from Google Patents.
Patent US5128146A successfully refreshed from Google Patents.
US5128146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apatite coated article and process for producing the same
Assignee: Pentax Corp
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Filing: 1991-11-13
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Granted: 1992-07-07
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Expires: 2011-11-13
Abstract
Abstract An apatite coated article comprising a substrate having thereon an apatite layer which is formed by flame spraying apatite powder at from about 2,000° to 4,000° C., and a process for producing such an apatite coated article.
Inventors
- 👤 Yasuhiko Hirayama
- 👤 Haruko Ikata
- 👤 Satoshi Ojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:43
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61C; A61C13/00; A61C13/225; A61C13/30; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/32; C; C23; C23C; C23C4/00; C23C4/04; C23C4/10; C23C4/11; A61C8/00; A61C8/0012; A61C8/0013; A61F2310/00; A61F2310/00389; A61F2310/00592; A61F2310/00796; H; H01; H01H; H01H73/00; H01H73/02; H01H73/18; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A process for producing an apatite coated article comprising a substrate having thereon an apatite layer, said process comprising flame spraying apatite powder at from about 2,000° to 4,000° C. onto said substrate, wherein said flame spraying is high-speed flame spraying using a gas jet wherein the gas jet speed has a Mach number of 2 or more.
Claim 2
Dependent Claim
58 words
A process for producing an apatite coated article comprising a substrate having thereon an apatite layer, said process comprising flame spraying apatite powder at from about 2,000° to 4,000° C. onto said substrate, wherein said flame spraying is high-speed flame spraying using a gas jet wherein the gas jet speed has a Mach number of 2 or more.
Claim 3
Dependent Claim
22 words
A process as claimed in claim 1 wherein said apatite powder has an average particle diameter of from 10 to 30 μm.
Claim 4
Dependent Claim
14 words
A process as claimed in claim 1, wherein said apatite powder is hydroxyapatite powder.
Claim 5
Dependent Claim
20 words
A process as claimed in claim 1, wherein said substrate is selected from a metal, an alloy and high-strength ceramics.
Claim 6
Dependent Claim
23 words
A process as claimed in claim 1, wherein said flame spraying is conducted at a temperature of from about 2,500° to 3,000° C.
Claim 7
Dependent Claim
21 words
A process as claimed in claim 1, wherein wherein the gas jet speed has a Mach number of 3 or more.
Claim 8
Dependent Claim
28 words
A process as claimed in claim 1, wherein the decomposition of the apatite is small and a substantially pure apatite layer is obtained without decomposition products being present.
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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) | 1995-07-07 | 1996-01-06 | 1996-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-07-07 | 2000-01-06 | 2000-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-07-07 | 2004-01-06 | 2004-07-07 | $7700.00 | Window Closed / Lapsed |