US5356423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resectable self-expanding stent
Assignee: WPAMS ACQUISITION CORP
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Filing: 1993-04-22
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Granted: 1994-10-18
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Expires: 2013-04-22
Abstract
Abstract A stent for transluminal implantation comprising a single-piece tubular member having a fenestrated side wall exhibiting a pattern of uniformly spaced openings defined by intersecting strands where the strands are integrally joined together at their points of intersection whereby the tubular member can be radially compressed from a larger diameter to a smaller diameter by the application of a uniform inwardly directed radial force and which self-expands to a larger diameter when the radial compressive force is removed. The compression and subsequent self-expansion occurs without an appreciable change in the stent's length. By forming the stent from a thermoplastic material, it may later be resected by carving it up into small pieces preferably using an electrosurgical instrument.
Inventors
- 👤 Claude Tihon
- 👤 John H. Burton
- 👤 Bradford G. Staehle
- 👤 Michael A. Mikulich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2220/00; A61F2220/0008; A61F2220/0016
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
72 words
A stent for insertion into a tubular organ for maintaining the organ patent, comprising a single-piece, single-layer, non-braided tubular member having a single-plane fenestrated side wall exhibiting a pattern of regular cut-outs forming spaced openings, said tubular member radially compressible from a larger diameter to a smaller diameter and self-expandable when the radial compressive force is removed, the compression and later expansion producing a change in length of less than about 10%.
Claim 2
Dependent Claim
72 words
A stent for insertion into a tubular organ for maintaining the organ patent, comprising a single-piece, single-layer, non-braided tubular member having a single-plane fenestrated side wall exhibiting a pattern of regular cut-outs forming spaced openings, said tubular member radially compressible from a larger diameter to a smaller diameter and self-expandable when the radial compressive force is removed, the compression and later expansion producing a change in length of less than about 10%.
Claim 3
Dependent Claim
17 words
The stent as in claim 1 wherein said tubular member is formed from an electrosurgically resectable material.
Claim 4
Dependent Claim
14 words
The stent as in claim 2 wherein said electrosurgically resectable material is a thermoplastic.
Claim 5
Dependent Claim
16 words
The stent as in claim 3 wherein said resectable material is an acetal homopolymer thermoplastic resin.
Claim 6
Dependent Claim
16 words
The stent as in claim 3 wherein said thermoplastic material incorporates a slow-release chemical component therein.
Claim 7
Dependent Claim
20 words
The stent as in claim 2 wherein said electrosurgically resectable material has an electrical conductivity approximately that of body tissue.
Claim 8
Dependent Claim
13 words
The stent as in claim 1 wherein said openings are generally parallelogram shaped.
Claim 9
Dependent Claim
12 words
The stent as in claim 1 wherein said openings are generally eye-shaped.
Claim 10
Dependent Claim
28 words
The stent as in claim 1 wherein a radial compression of said tubular member by fifty percent results in a change in length of less than ten percent.
Claim 11
Dependent Claim
28 words
The stent as claimed in claim 1 wherein the tubular member has a radial thickness from about 1.25 to 2.25 times the smallest distance between the spaced openings.
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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) | 1997-10-17 | 1998-04-18 | 1998-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-17 | 2002-04-18 | 2002-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-17 | 2006-04-18 | 2006-10-18 | $7700.00 | Window Closed / Lapsed |