US3862452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogel substitutes for tubular somatic organs
Assignee: Czech Academy of Sciences
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Filing: 1971-06-21
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Granted: 1975-01-28
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Expires: 1991-06-21
Abstract
Abstract Substitute somatic organ comprising an insert formed of a tubular knitted textile material and an outer covering bonded to it. The outer covering comprises a hydrogel polymerized about the textile insert in situ.
Inventors
- 👤 Otto Wichterle
- 👤 Karel Kliment
- 👤 Jiri Vacik
- 👤 Zdenek Ott
- 👤 Miroslav Stol
- 👤 Jan Dvorak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:57
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L27/00; A61L27/14; A61L27/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
35 words
The substitute according to claim 1, including a hydrogel layer containing a biologically active substance intermediate the knitted textile material and the outer covering, said intermediate layer being bonded in situ to said textile material.
Claim 2
Dependent Claim
23 words
The substitute organ according to claim 1 wherein said reinforcing insert comprises knitted polyester textile material inert with respect to said monomer mixture.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |