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US5282861A
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Open cell tantalum structures for cancellous bone implants and cell and tissue receptors
Assignee: Tantalum Celullar Products LLC
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Filing: 1992-03-11
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Granted: 1994-02-01
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Expires: 2012-03-11
Abstract
Abstract A tantalum open cell structure is formed by chemical vapor deposition onto a reticulated carbon foam substrate. Tantalum has a long history of use as an implant material, in both bone and soft tissue. This lightweight, strong, porous structure, mimicking the microstructure of natural cancellous bone, acts as a matrix for the incorporation of bone, providing optimal permeability and a high surface area to encourage new bone ingrowth.
Inventors
- 👤 Richard B. Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:36
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/114; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2/30; A61F2/30767; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/306; A61L27/50; A61L27/56; A61F2/3094; A61F2002/30001; A61F2002/30108; A61F2002/30199; A61F2002/30261; A61F2002/3092; A61F2230/00; A61F2230/0063; A61F2230/0082; A61F2310/00; A61F2310/00005; A61F2310/00161; A61F2310/00179; A61F2310/00389; A61F2310/00395; A61F2310/00419; A61F2310/00491; A61F2310/00544; A61L2430/00; A61L2430/02
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
80 words
A cancellous bone substitute and cell and tissue reception material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam carbonaceous material having open spaces defined by an interconnecting network wherein said foam material has interconencted continuous channels, and a thin film of metallic material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 2
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue reception material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam carbonaceous material having open spaces defined by an interconnecting network wherein said foam material has interconencted continuous channels, and a thin film of metallic material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 3
Dependent Claim
13 words
The bone substitute material of claim 1 wherein the carbonaceous material is carbon.
Claim 4
Dependent Claim
13 words
The bone substitute material of claim 1 wherein the carbonaceous material is graphite.
Claim 5
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam ceramic materal having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of metallic material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 6
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam ceramic materal having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of metallic material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 7
Dependent Claim
12 words
The bone substitute material of claim 4 wherein the ceramic is refractory.
Claim 8
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam carbonaceous substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a metallic film substantially covering the interconnected network.
Claim 9
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam carbonaceous substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a metallic film substantially covering the interconnected network.
Claim 10
Dependent Claim
12 words
The composite material of claim 6 wherein the carbonaceous material is carbon.
Claim 11
Dependent Claim
12 words
The composite material of claim 6 wherein the carbonaceous material is graphite.
Claim 12
Dependent Claim
79 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of tantalum material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 13
Dependent Claim
79 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of tantalum material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 14
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaced defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of tantalum alloy material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 15
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaced defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of tantalum alloy material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 16
Dependent Claim
79 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of niobium material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 17
Dependent Claim
79 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaces defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of niobium material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 18
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaced defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of niobium alloy material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 19
Dependent Claim
80 words
A cancellous bone substitute and cell and tissue receptive material, including, a reticulated open cell substrate formed of a lightweight substantially rigid foam material having open spaced defined by an interconnecting network wherein said foam material has interconnected continuous channels, and a thin film of niobium alloy material deposited onto the reticulated open cell substrate and covering substantially all of the interconnecting network to form a composite porous biomaterial creating a porous microstructure similar to that of natural cancellous bone.
Claim 20
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam ceramic substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a metallic film substantially covering the interconnected network.
Claim 21
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam ceramic substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a metallic film substantially covering the interconnected network.
Claim 22
Dependent Claim
11 words
The composite material of claim 13 wherein the ceramic is refractory.
Claim 23
Dependent Claim
60 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a tantalum film substantially covering the interconnected network.
Claim 24
Dependent Claim
60 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a tantalum film substantially covering the interconnected network.
Claim 25
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a tantalum alloy film substantially covering the interconnected network.
Claim 26
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a tantalum alloy film substantially covering the interconnected network.
Claim 27
Dependent Claim
60 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a niobium film substantially covering the interconnected network.
Claim 28
Dependent Claim
60 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrate formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a niobium film substantially covering the interconnected network.
Claim 29
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrated formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a niobium alloy film substantially covering the interconnected network.
Claim 30
Dependent Claim
61 words
A composite material useful as a bone substitute for bone implants and cell and tissue reception, the structure of which is characterized by a non-metallic open cell substantially rigid foam substrated formed by an interconnected network having interconnected continuous channels to create a porous microstructure similar to that of cancellous bone and a niobium alloy film substantially covering the interconnected network.
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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) | 1997-01-31 | 1997-08-02 | 1998-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-31 | 2001-08-02 | 2002-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-31 | 2005-08-02 | 2006-02-01 | $7700.00 | Window Closed / Lapsed |