US4610693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Implanting article molded by centrifugal dispersion and the method for producing the same
Assignee: Aisin Corp
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Filing: 1984-04-09
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Granted: 1986-09-09
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Expires: 2004-04-09
Abstract
Abstract An implanting article which includes a base body composed of a mother material and a surface portion containing dispersed apatite particles. The base body and surface portion are formed in a mold by solidifying the mother material containing apatite particles under centrifugal force. The resulting implanting article has good mechanical properties because the base body scarcely includes apatite particles in addition the article has a good affinity with a live body because the surface portion contains apatite particles densely distributed thereat.
Inventors
- 👤 Shigeo Niwa
- 👤 Junji Sugishita
- 👤 Masami Ishii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:17
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/32; A61C; A61C8/00; A61C8/0012; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/32; A61F2/34; A61F2/3094; A61F2310/00; A61F2310/00389; A61F2310/00592; A61F2310/00796
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
62 words
An implanting article to be implanted into a live body, comprising: a centrifugally cast base body including a surface portion which covers at least a portion of said base body wherein said base body includes a central portion composed mainly of a mother material suitable for implant use and wherein said surface portion comprises a surface layer portion containing dispersed apatite particles.
Claim 2
Dependent Claim
62 words
An implanting article to be implanted into a live body, comprising: a centrifugally cast base body including a surface portion which covers at least a portion of said base body wherein said base body includes a central portion composed mainly of a mother material suitable for implant use and wherein said surface portion comprises a surface layer portion containing dispersed apatite particles.
Claim 3
Dependent Claim
14 words
An implanting article according to claim 1, wherein said mother material comprises a metal.
Claim 4
Dependent Claim
21 words
An implanting article according to claim 2, wherein said metal is selected from the group consisting of aluminum and aluminum alloy.
Claim 5
Dependent Claim
15 words
An implanting article according to claim 1, wherein said mother material comprises a synthetic resin.
Claim 6
Dependent Claim
18 words
An implanting article according to claim 4, wherein said synthetic resin contains fibers for reinforcing said synthetic resin.
Claim 7
Dependent Claim
20 words
An implanting article according to claim 1, wherein the thickness of said surface portion is between 0.05 and 2 mm.
Claim 8
Dependent Claim
27 words
An implanting article according to claim 1, wherein the distribution density of the apatite included in said surface layer portion is from 10 to 90 volumetric percent.
Claim 9
Dependent Claim
16 words
An implanting article according to claim 1, wherein said surface layer portion includes a second dispersant.
Claim 10
Dependent Claim
13 words
An implanting article according to claim 8, wherein said second dispersant comprises alumina.
Claim 11
Independent Claim
85 words
A method for producing an implanting article, which comprises; placing a mixture of mother material suitable for implant use and apatite particles having a different and greater specific gravity than that of said mother material into a mold, melting the mother material of said mixture; rotating said mold to apply a centrifugal force with a gravity force factor of 5G to 3000G to said mixture, solidifying said mixture under the application of said centrifugal force and removing a resulting solidified article out of said mold.
Claim 12
Independent Claim
85 words
A method for producing an implanting article, which comprises; placing a mixture of mother material suitable for implant use and apatite particles having a different and greater specific gravity than that of said mother material into a mold, melting the mother material of said mixture; rotating said mold to apply a centrifugal force with a gravity force factor of 5G to 3000G to said mixture, solidifying said mixture under the application of said centrifugal force and removing a resulting solidified article out of said mold.
Claim 13
Dependent Claim
22 words
A method according to claim 10, wherein said step of rotating said mold comprises rotating said mold about a central axis thereof.
Claim 14
Dependent Claim
19 words
A method according to claim 10, wherein said mold is rotated about a rotational axis offset from said mold.
References Cited (Backward Citations)
DE1303139B
Cited
US3468997A
Cited
GB1380262A
Cited
US4051598A
Cited
DE2546824A1
Cited
US4146936A
Cited
DE2725665A1
Cited
JPS54138006A
Cited
US4379694A
Cited
DE2905647A1
Cited
DE2928007A1
Cited
US4548959A
Cited
US4371484A
Cited
JPS57118849A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-09-08 | 1990-03-10 | 1990-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-08 | 1994-03-10 | 1994-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-08 | 1998-03-10 | 1998-09-09 | $7700.00 | Window Closed / Lapsed |