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Patent US5234456A successfully refreshed from Google Patents.
US5234456A
Expired / Lapsed
US
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Hydrophilic stent
Assignee: Boston Scientific Scimed Inc
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Filing: 1992-05-07
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Granted: 1993-08-10
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Expires: 2012-05-07
Abstract
Abstract A stent for placement within a body lumen and comprising a wall structure wherein at least a portion thereof is a hollow wall. The hollow wall has disposed therein a hydrophilic material which can be in the form of a gel, for example, which swells upon introduction of a liquid into the hollow wall to thereby achieve inflation thereof. The hollow wall is fabricated of a semi-permeable membrane whereby fluid from tissues surrounding the stent at the site of placement can pass through the membrane and swell the hydrophilic material to thereby inflate the hollow wall. A drug can be disposed with the hydrophilic material for release through the membrane at the site of stent placement. The entire wall structure of the stent can be a hollow wall, or the wall structure can incorporate both hollow and non-hollow wall portions such as hollow and solid fibers which are braided, woven or wound together.
Inventors
- 👤 Thomas A. Silvestrini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:21
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61F2/90; A61F2/91; A61F2002/825; A61F2250/00; A61F2250/0003; A61F2250/0058; A61F2250/0067; A61M; A61M25/00; A61M25/10; A61M25/1002
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
61 words
A stent for placement within a body lumen. The stent comprising a wall structure wherein at least a portion thereof is a closed hollow wall having a plurality of radial openings therethrough, fabricated from a semi-permeable membrane, and wherein the hollow wall has disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 2
Dependent Claim
61 words
A stent for placement within a body lumen. The stent comprising a wall structure wherein at least a portion thereof is a closed hollow wall having a plurality of radial openings therethrough, fabricated from a semi-permeable membrane, and wherein the hollow wall has disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 3
Dependent Claim
14 words
A stent as claimed in claim 1 wherein the hydrophilic material is a gel.
Claim 4
Dependent Claim
13 words
A stent as claimed in claim 1 wherein the configuration thereof is tubular.
Claim 5
Dependent Claim
13 words
A stent as claimed in claim 3 wherein the stent is a balloon.
Claim 6
Dependent Claim
16 words
A stent as claimed in claim 1 wherein the hydrophilic material has disposed therewith a drug.
Claim 7
Dependent Claim
69 words
A stent for placement within a body lumen, the stent comprising a wall structure wherein at least a portion thereof is a hollow wall fabricated from hollow closed fibers which are constructed of semi-permeable membranes and held together by being braided, woven or wound together, and wherein the hollow fibers have disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 8
Dependent Claim
69 words
A stent for placement within a body lumen, the stent comprising a wall structure wherein at least a portion thereof is a hollow wall fabricated from hollow closed fibers which are constructed of semi-permeable membranes and held together by being braided, woven or wound together, and wherein the hollow fibers have disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 9
Dependent Claim
14 words
A stent as claimed in claim 6 wherein the hydrophilic material is a gel.
Claim 10
Dependent Claim
16 words
A stent as claimed in claim 6 wherein the hydrophilic material has disposed therewith a drug.
Claim 11
Dependent Claim
61 words
A stent for placement within a body lumen, the stent having a spiral configuration when inflated and comprising a wall structure wherein at least a portion thereof is a closed hollow wall, fabricated from a semi-permeable membrane, and wherein the hollow wall has disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 12
Dependent Claim
61 words
A stent for placement within a body lumen, the stent having a spiral configuration when inflated and comprising a wall structure wherein at least a portion thereof is a closed hollow wall, fabricated from a semi-permeable membrane, and wherein the hollow wall has disposed therein a hydrophilic material capable of absorbing a liquid to thereby increase the volume of said material.
Claim 13
Dependent Claim
16 words
A stent as claimed in claim 9 wherein the hydrophilic material has disposed therewith a drug.
Claim 14
Dependent Claim
18 words
A stent as claimed in claim 9 wherein at least a portion of the hollow wall is reinforced.
Claim 15
Dependent Claim
13 words
A stent as claimed in claim 9 wherein the stent is a balloon.
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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) | 1996-08-09 | 1997-02-08 | 1997-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-09 | 2001-02-08 | 2001-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-09 | 2005-02-08 | 2005-08-10 | $7700.00 | Window Closed / Lapsed |