Patent DE3435771A1 successfully refreshed from Google Patents.
US3563925A
Expired / Lapsed
US
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Composition containing interlocked foams of partly tanned collagen and cross-linked glycol methacrylate polymer
Assignee: Czech Academy of Sciences
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Filing: 1967-12-20
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Granted: 1971-02-16
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Expires: 1987-12-20
Abstract
Abstract A CONTINUOUS SOLID MATERIAL CONSISTING OF INTERLOCKED THREE-DIMENSIONAL NETWORKS OF HYDRATED, PARTLY TANNED COLLAGEN AND SPARINGLY CROSS-LINKED, HYDRATED POLYMERS OF GLYCOL METHACRYLATE, WHEN MADE INTO BLOOD VESSELS, URINARY BLADDERS, AND OTHER BODY PARTS, IS IMPERVIOUS TO LIQUID WHEN FRESHLY IMPLANTED, YET READILY PENETRATED BY TISSUE GROWTH, AND WELL TOLERATED WHEN THE PORES IN THE POLYMER ARE BETWEEN 150 AND 450 MICRONS IN DIAMETER, AND THE COLLAGEN AMOUNTS TO 10%-50% OF THE TOTAL DRY WEIGHT OF POLYMER AND COLLAGEN.
Inventors
- 👤 Karel Kliment
- 👤 Milos Chvapil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
A; A61; A61L; A61L27/00; A61L27/14; A61L27/26; C; C08; C08F; C08F289/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |