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US5674277A
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Stent for placement in a body tube
Assignee: Merit Medical Systems Inc
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Filing: 1995-11-22
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Granted: 1997-10-07
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Expires: 2015-11-22
Abstract
Abstract A stent for placement in a body tube includes a flexible support structure composed of an elastomer which is hard in a temperature range lower than 25° C. and soft in a temperature range greater 35° C. The flexible support structure may be embedded in a hollow cylindrical casing of an elastic synthetic material which has a limited elasticity at least at body temperature, wherein the casing is composed of an elastomer which is hard in a temperature range lower than 25° C. and soft in a temperature range greater than 35° C. The casing in which the flexible support structure is embedded may also be of a memory elastomer, particularly on the basis of polyurethane.
Inventors
- 👤 Lutz Freitag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/86; A61F2/90; A61L; A61L31/00; A61L31/02; A61L31/14; A61F2/0077; A61F2/88; A61F2/89; A61F2002/072; A61F2210/00; A61F2210/0014; A61F2210/0019
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
89 words
A stent for placement in a body tube, the stent comprising a flexible support structure, wherein the support structure is of an elastomer which has a high stiffness in a temperature range lower than 25° C. and is soft so as to be flexible such that the structure can be easily guided around curvatures of the body tube in a temperature range higher than 35° C., wherein the support structure has meshes, the meshes having a size selected such that tissue capable of functioning can grow through the meshes.
Claim 2
Dependent Claim
89 words
A stent for placement in a body tube, the stent comprising a flexible support structure, wherein the support structure is of an elastomer which has a high stiffness in a temperature range lower than 25° C. and is soft so as to be flexible such that the structure can be easily guided around curvatures of the body tube in a temperature range higher than 35° C., wherein the support structure has meshes, the meshes having a size selected such that tissue capable of functioning can grow through the meshes.
Claim 3
Dependent Claim
27 words
The stent according to claim 1, wherein the support structure comprises at least one thread, the at least one thread being braided for stabilizing the support structure.
Claim 4
Dependent Claim
21 words
The stent according to claim 1, wherein the support structure comprises threads, the threads being braided for stabilizing the support structure.
Claim 5
Dependent Claim
17 words
The stent according to claim 3, further comprising at least one additional thread of a memory metal.
Claim 6
Dependent Claim
14 words
The stent according to claim 4, wherein the thread is of a nickel/titanium alloy.
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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) | 2000-10-06 | 2001-04-07 | 2001-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-10-06 | 2005-04-07 | 2005-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-10-06 | 2009-04-07 | 2009-10-07 | $7700.00 | Window Closed / Lapsed |