Patent US5356423A successfully refreshed from Google Patents.
US5356423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resectable self-expanding stent
Assignee: WPAMS ACQUISITION CORP
•
Filing: 1993-04-22
•
Granted: 1994-10-18
•
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 02:39
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.
References Cited (Backward Citations)
FR1602513A
Cited
US4954126B1
Cited
US4655771A
Cited
US4954126A
Cited
US4655771B1
Cited
US4879135A
Cited
EP0201466A2
Cited
US4776337A
Cited
US4776337B1
Cited
US4878906A
Cited
GB2189150A
Cited
US4957508A
Cited
US4893623A
Cited
US4957479A
Cited
US5015253A
Cited
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 |