US5425770A
Expired / Lapsed
US
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Calcium phosphate/atelopeptide collagen compositions for bone repair
Assignee: Angiotech Pharmaceuticals Inc
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Filing: 1993-07-30
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Granted: 1995-06-20
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Expires: 2013-07-30
Abstract
Abstract Processes for the preparation of compositions used in conductive bone repair are disclosed. The compositions contain a mixture consisting essentially of either a calcium phosphate particulate mineral component or particulate hydroxyapatite in admixture with atelopeptide reconstituted fibrillar collagen. The method is comprised of mixing a dispersion of the collagen and mineral, the latter which is present in dry particulate form, followed by molding and drying the composition in a mold to obtain a dried composition.
Inventors
- 👤 Karl A. Piez
- 👤 Bruce B. Pharriss
- 👤 George H. Chu
- 👤 Thomas L. Smestad
- 👤 Diana Hendricks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/40; A61L27/44; A61L27/46; A61F; A61F2/00; A61F2/02; A61F2/28; A61F2002/2835; A61L2430/00; A61L2430/02; Y; Y10; Y10S; Y10S128/00; Y10S128/08; Y10S623/00; Y10S623/92; Y10S623/923
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A conductive bone-repair composition which contains a mixture consisting essentially of about 87 to 91% calcium phosphate particulate mineral component, said mineral component being a mixture of about 60% hydroxyapatite and about 40% tricalcium phosphate, in admixture with about 9 to 13% of atelopeptide reconstituted fibrillar collagen, said composition is prepared by a process comprising the steps of: mixing a liquid dispersion of said collagen with the mineral component in dry particulate form, followed by molding and drying the composition in the mold to obtain a dried composition.
Claim 2
Dependent Claim
88 words
A conductive bone-repair composition which contains a mixture consisting essentially of about 87 to 91% calcium phosphate particulate mineral component, said mineral component being a mixture of about 60% hydroxyapatite and about 40% tricalcium phosphate, in admixture with about 9 to 13% of atelopeptide reconstituted fibrillar collagen, said composition is prepared by a process comprising the steps of: mixing a liquid dispersion of said collagen with the mineral component in dry particulate form, followed by molding and drying the composition in the mold to obtain a dried composition.
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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) | 1998-06-19 | 1998-12-19 | 1999-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-19 | 2002-12-19 | 2003-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-19 | 2006-12-19 | 2007-06-20 | $7700.00 | Window Closed / Lapsed |