US4457984A
Expired / Lapsed
US
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Carbon artificial prosthetic material
Assignee: Mitsubishi Chemical Corp
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Filing: 1982-01-29
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Granted: 1984-07-03
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Expires: 2002-01-29
Abstract
Abstract An artificial prosthetic material made of a carbon source as a main component comprises a porous structure layer comprising a fibrous material and pyrolytic carbon deposited fibrous material.
Inventors
- 👤 Sugio Otani
- 👤 Sadakatsu Yanagisawa
- 👤 Kunio Niijima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:55
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/30767; A61C; A61C8/00; A61C8/0012; A61L; A61L27/00; A61L27/02; A61L27/08; A61C8/0013; A61F2/3094; A61F2/30965; A61F2310/00; A61F2310/00005; A61F2310/00161; A61F2310/00389; A61F2310/00574; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/292; Y10T428/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
An artificial prosthetic material made substantially of a carbon source and having a graduated porous structure layer comprising: randomly piled non-woven fibrous material; and pyrolytic carbon deposited on the fibrous material to bond the material together; said porous structure layer having a thickness of at least about 0.1 mm and pores of at least about 100 μm in diameter at the surface and gradually reduced inside the layer.
Claim 2
Dependent Claim
68 words
An artificial prosthetic material made substantially of a carbon source and having a graduated porous structure layer comprising: randomly piled non-woven fibrous material; and pyrolytic carbon deposited on the fibrous material to bond the material together; said porous structure layer having a thickness of at least about 0.1 mm and pores of at least about 100 μm in diameter at the surface and gradually reduced inside the layer.
Claim 3
Dependent Claim
27 words
The artificial prosthetic material according to claim 1 wherein said porous structure layer is formed by a deposition of pyrolytic carbon formed by a vapor phase pyrolysis.
Claim 4
Dependent Claim
20 words
The artificial prosthetic material according to claim 2 wherein the fibrous material is made of carbon fiber or metal fiber.
Claim 5
Dependent Claim
26 words
The artificial prosthetic material according to claim 1 wherein the fibrous material is bonded with a binder and carbonized before the final deposition of pyrolytic carbon.
Claim 6
Dependent Claim
28 words
The artificial prosthetic material according to claim 1, wherein said porous structure layer is placed on a substrate made of carbon or a metal as a conductive material.
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) | 1987-07-03 | 1988-01-02 | 1988-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-03 | 1992-01-02 | 1992-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-03 | 1996-01-02 | 1996-07-03 | $7700.00 | Window Closed / Lapsed |