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Patent US5425770A successfully refreshed from Google Patents.
US5425770A
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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 14:47
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.
References Cited (Backward Citations)
US3443261A
Cited
US3767437A
Cited
US3892648A
Cited
US3949073A
Cited
US4192021A
Cited
US4349470A
Cited
US4516276A
Cited
EP0030583A1
Cited
US4314380A
Cited
US4472840A
Cited
US4440750A
Cited
US4623553A
Cited
US4627982A
Cited
US4888366A
Cited
US4795467A
Cited
US4992226A
Cited
US5246457A
Cited
US4776890A
Cited
US4743229A
Cited
US4865602A
Cited
US5035715A
Cited
US5123925A
Cited
US5231169A
Cited
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 |