US6110484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Collagen-polymer matrices with differential biodegradability
Assignee: Angiotech Pharmaceuticals Inc
•
Filing: 1998-11-24
•
Granted: 2000-08-29
•
Expires: 2018-11-24
Abstract
Abstract The current invention is a biomedical implant comprising a biomedical matrix material and a biodegradable porosifying agent. As the porosifying agent degrades in situ, an implant with an inter-connecting network is formed. The resultant mechanically stable implant allows for tissue and fluid influx into the matrix. The invention is also directed to a method for repair of mammalian tissue using the above-described implant.
Inventors
- 👤 David H. Sierra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:22
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/50; A61L27/56; A61L27/14; A61L27/22; A61L27/225; A61L27/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
54 words
A method for forming a fibrin matrix at a tissue site comprising the steps of: providing particulate crosslinked gelatin in dry, liquid or solid form; mixing an effective fibrin-forming amount of thrombin with the particulate crosslinked gelatin to form a mixture; and allowing the mixture to further mix with fibrinogen at the tissue site.
Claim 2
Independent Claim
54 words
A method for forming a fibrin matrix at a tissue site comprising the steps of: providing particulate crosslinked gelatin in dry, liquid or solid form; mixing an effective fibrin-forming amount of thrombin with the particulate crosslinked gelatin to form a mixture; and allowing the mixture to further mix with fibrinogen at the tissue site.
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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) | 2003-08-29 | 2004-02-28 | 2004-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-08-29 | 2008-02-28 | 2008-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-08-29 | 2012-02-28 | 2012-08-29 | $7700.00 | Window Closed / Lapsed |