US4239113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for the preparation of bone cement
Assignee: Kulzer GmbH
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Filing: 1978-06-01
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Granted: 1980-12-16
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Expires: 1998-06-01
Abstract
Abstract A bone cement in pliable and moldable form which when applied to bone and cured has superior characteristics containing an admixture of methylmethacrylate copolymers, methylmethacrylate, and between 15 and 75% by weight of an inorganic composition of between about 90 and 99% of a bio-active glass ceramic powder having a particle size of 10-200 micrometer and between 1 and 10% of vitreous mineral fibers having a length of less than 20 mm. The composition also contains a curing catalyst and, preferably, an accelerator.
Inventors
- 👤 Albert Gross
- 👤 Werner Ege
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:40
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/8802; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/14; C08K7/16; C08K7/18; C08K7/20; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/3008; A61F2002/30667; A61F2002/30677; A61F2/46; A61F2002/4631; A61F2250/00; A61F2250/0058; A61F2250/0096; A61F2250/0098; A61L2430/00; A61L2430/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
142 words
An uncured bone cement composition which when cured forms a bone cement comprising between about (i) 15% and 75% by weight of a mixture of inorganic materials consisting essentially of between about 90 and 99% by weight of a powdered bio-active glass ceramic of a particle size between about 10 and 200 micrometer, said bio-active glass ceramic consists essentially of between about 20 and about 60% by weight of SiO 2 , between about 5 and 40% P 2 O 5 , between about 2.7 and 20% Na 2 O, between about 0.4 and 20% K 2 O, between about 2.9 and 30% MgO, and between about 5 and 40% CaO, and between about 5 and 10% by weight of vitreous mineral fibers between about 2 and 5 mm long, admixed with (ii) a mixture of copolymers of methylmethacrylate and methyl acrylate.
Claim 2
Dependent Claim
142 words
An uncured bone cement composition which when cured forms a bone cement comprising between about (i) 15% and 75% by weight of a mixture of inorganic materials consisting essentially of between about 90 and 99% by weight of a powdered bio-active glass ceramic of a particle size between about 10 and 200 micrometer, said bio-active glass ceramic consists essentially of between about 20 and about 60% by weight of SiO 2 , between about 5 and 40% P 2 O 5 , between about 2.7 and 20% Na 2 O, between about 0.4 and 20% K 2 O, between about 2.9 and 30% MgO, and between about 5 and 40% CaO, and between about 5 and 10% by weight of vitreous mineral fibers between about 2 and 5 mm long, admixed with (ii) a mixture of copolymers of methylmethacrylate and methyl acrylate.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein said bio-active glass ceramic particles are of a size from about 90 and 125 micrometer.
Claim 4
Dependent Claim
14 words
The composition of claim 1 wherein said vitreous mineral fibers are composed of glass.
Claim 5
Dependent Claim
16 words
The composition of claim 1 wherein said vitreous mineral fibers are composed of bio-active glass ceramic.
Claim 6
Dependent Claim
65 words
The composition of claim 4 wherein said bio-active glass ceramic fibers consists essentially of between about 20 and about 60% by weight of SiO 2 , between about 5 and 40% P 2 O 5 , between about 2.7 and 20% Na 2 O, between about 0.4 and 20% K 2 O, between about 2.9 and 30% MgO, and between about 5 and 40% CaO.
Claim 7
Dependent Claim
22 words
The composition according to each of claims 1, 2, 3, 4 or 5 which also contains monomer methyl methacrylate and a catalyst.
Claim 8
Dependent Claim
18 words
The composition of claim 1 which also contains monomeric methyl methacrylate and a peroxy compound as a catalyst.
Claim 9
Dependent Claim
12 words
The composition of claim 1 which also contains a X-ray contrast means.
Claim 10
Dependent Claim
12 words
The composition of claim 8 wherein said contrast means is zirconium dioxide.
Claim 11
Dependent Claim
16 words
The composition of claim 1 which also contains a small but effective amount of an antibiotic.
Claim 12
Dependent Claim
17 words
The composition of claim 10 wherein said antibiotic is Gentamycin or one of its pharmaceutically acceptable salts.
Claim 13
Dependent Claim
10 words
The composition of claim 1 which also contains a catalyst.
Claim 14
Dependent Claim
31 words
A two-package kit for making a bone cement comprising a first package containing the composition of claim 12 and a second package comprising a liquid containing monomeric methylmethacrylate and an accelerator.
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) | 1983-12-16 | 1984-06-16 | 1984-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-16 | 1988-06-16 | 1988-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-16 | 1992-06-16 | 1992-12-16 | $7700.00 | Window Closed / Lapsed |