US5551954A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biodegradable drug delivery vascular stent
Assignee: Boston Scientific Scimed Inc
•
Filing: 1994-10-12
•
Granted: 1996-09-03
•
Expires: 2014-10-12
Abstract
Abstract A stent includes a main body of a generally tubular shape having an exterior surface, a cambered interior surface, a leading end and a trailing end. The main body has substantially the same thickness at the leading end as at the trailing end. The stent may be made of a biodegradable material having a rate of degradation and including a drug releasable at a rate controlling the rate of degradation of the biodegradable material.
Inventors
- 👤 Paul J. Buscemi
- 👤 Elizabeth A. Stejskal
- 👤 Erin S. Doyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/88; A61L; A61L31/00; A61L31/14; A61L31/148; A61L31/16; A61F2/95; A61F2/958; A61F2210/00; A61F2210/0004; A61F2210/0014; A61F2210/0023; A61F2210/0076; A61F2250/00; A61F2250/0058; A61F2250/0067; A61L2300/00; A61L2300/60; A61L2300/602; A61L2300/604; A61L2300/62; A61L2300/622
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
122 words
A stent having a generally tubular main body formed from a coiled strip for insertion into a lumen of a vessel of a living being wherein the main body includes an exterior surface for contacting the vessel when the main body is placed in a living being, said coiled strip including a cambered interior surface contacting a fluid passing through the lumen of the vessel, said coiled strip including a substantially flat exterior surface to which said cambered interior surfaces abuts, said cambered interior surface including a leading end facing a direction of flow and a trailing end wherein the leading end is immediately adjacent a wall of the vessel and the trailing end is immediately adjacent the wall of the vessel.
Claim 2
Dependent Claim
122 words
A stent having a generally tubular main body formed from a coiled strip for insertion into a lumen of a vessel of a living being wherein the main body includes an exterior surface for contacting the vessel when the main body is placed in a living being, said coiled strip including a cambered interior surface contacting a fluid passing through the lumen of the vessel, said coiled strip including a substantially flat exterior surface to which said cambered interior surfaces abuts, said cambered interior surface including a leading end facing a direction of flow and a trailing end wherein the leading end is immediately adjacent a wall of the vessel and the trailing end is immediately adjacent the wall of the vessel.
Claim 3
Dependent Claim
29 words
The stent of claim 1 wherein a camber of the cambered interior surface has an angle of curvature that is substantially within a range of 10 to 20 degrees.
Claim 4
Dependent Claim
15 words
The stent of claim 1 wherein the coiled strip is made of a biodegradable material.
Claim 5
Dependent Claim
31 words
The stent of claim 1 wherein the exterior surface includes pores, the pores having a diameter, depth and distribution that are effective to promote growth of cells on the exterior surface.
Claim 6
Dependent Claim
18 words
The stent of claim 3 wherein the coiled strip is made of a biodegradable material in a layer.
Claim 7
Dependent Claim
17 words
The stent of claim 3 and further including a water soluble coating that overlays the interior surface.
Claim 8
Dependent Claim
42 words
The stent of claim 3 wherein the main body has a rate of degradation and further includes a drug that is releasable into the lumen of the vessel at a rate that modifies the rate of degradation of the biodegradable main body.
Claim 9
Dependent Claim
44 words
The stent of claim 3 wherein the main body has a rate of degradation and further includes a drug that is releasable into the lumen of the vessel at a rate that is controlled by the rate of degradation of the biodegradable main body.
Claim 10
Dependent Claim
36 words
The coiled strip of claim 3 wherein the biodegradable material is treated by application of energy of a magnitude ineffective to cause bonding with living tissue of the lumen while the stent is in the lumen.
Claim 11
Dependent Claim
25 words
The coiled strip of claim 9 further comprising a meltable film coating that melts upon application of the energy and that overlays the interior surface.
Claim 12
Dependent Claim
27 words
The coiled strip of claim 9 wherein the energy causes an increase in temperature of the biodegradable material above a glass transition temperature of the biodegradable material.
Claim 13
Dependent Claim
139 words
A stent having a generally tubular main body formed from a coiled strip for insertion into a lumen of a vessel of a living being wherein the main body includes an exterior surface for contacting the vessel when the main body is placed in a living being and said coiled strip including a cambered interior surface contacting a fluid passing through the lumen of the vessel, said coiled strip including a substantially flat exterior surface to which said cambered interior surfaces abuts, the cambered interior surface including a leading end and a trailing end, the leading end immediately adjacent a wall of the vessel and the trailing end immediately adjacent the wall of the vessel, wherein a camber of the cambered interior surface has an angle of curvature that is substantially within a range of 10 to 20 degrees.
Claim 14
Dependent Claim
139 words
A stent having a generally tubular main body formed from a coiled strip for insertion into a lumen of a vessel of a living being wherein the main body includes an exterior surface for contacting the vessel when the main body is placed in a living being and said coiled strip including a cambered interior surface contacting a fluid passing through the lumen of the vessel, said coiled strip including a substantially flat exterior surface to which said cambered interior surfaces abuts, the cambered interior surface including a leading end and a trailing end, the leading end immediately adjacent a wall of the vessel and the trailing end immediately adjacent the wall of the vessel, wherein a camber of the cambered interior surface has an angle of curvature that is substantially within a range of 10 to 20 degrees.
Claim 15
Dependent Claim
14 words
The stent of claim 12 wherein the coiled strip is made of biodegradable material.
Claim 16
Dependent Claim
18 words
The stent of claim 13 wherein the coiled strip is made of a biodegradable material in a layer.
Claim 17
Dependent Claim
20 words
The stent of claim 13 and further including a water soluble coating that overlays the interior surface of the stent.
Claim 18
Dependent Claim
42 words
The stent of claim 13 wherein the coiled strip has a rate of degradation and further includes a drug that is releasable into the lumen of the vessel at a rate that modifies the rate of degradation of the biodegradable main body.
Claim 19
Dependent Claim
44 words
The stent of claim 13 wherein the coiled strip has a rate of degradation and further includes a drug that is releasable into the lumen of the vessel at a rate that is controlled by the rate of degradation of the biodegradable main body.
Claim 20
Dependent Claim
35 words
The stent of claim 13 wherein the biodegradable material is treated by application of energy of a magnitude ineffective to cause bonding with living tissue of the lumen while the stent is in the lumen.
Claim 21
Dependent Claim
26 words
The stent of claim 18 wherein the energy causes an increase in temperature of the biodegradable material above a glass transition temperature of the biodegradable material.
Claim 22
Dependent Claim
29 words
The stent of claim 18 further comprising a meltable film coating that overlays the interior surface of the tubular main body and that melts upon application of the energy.
Claim 23
Dependent Claim
31 words
The stent of claim 12 wherein the exterior surface includes pores, the pores having a diameter, depth and distribution that are effective to promote growth of cells on the exterior surface.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |