Patent US6214040B1 successfully refreshed from Google Patents.
US6214040B1
Expired / Lapsed
US
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Sandwich stent with spiraling bands on an outer surface
Assignee: Iowa India Investments Co Ltd
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Filing: 1999-08-24
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Granted: 2001-04-10
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Expires: 2019-08-24
Abstract
Abstract A stent is made generally tubular and is initially formed in a collapsed configuration. A fabric cover is provided for the inner stent and is attached outside the stent at one or more desired locations. The fabric cover is larger in diameter than the diameter of the collapsed stent, however, when the stent is expanded through activation of the balloon catheter therewithin, the stent expands to closely conform to the interior walls of the fabric cover. The securement of the fabric cover or intermediate stent layer about the inner stent is accomplished through the use of a wire spiraling externally about the outer surface of the fabric cover to secure the fabric cover or intermediate stent layer about the inner stent. When the stent sandwich is expanded, the configuration of this spiraling wire permits it to expand as well and lie against the inner walls of the blood vessel at the desired location. The stent has spaced ends, each of which may be coated or otherwise provided with a radio-opaque material.
Inventors
- 👤 Swaminathan Jayaraman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/86; A61F2/90; A61F2002/075
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
147 words
A stent assembly comprising: a) an inner continuous stent extending along the entire length of the assembly having spaced ends; b) a fabric cover folded over the entire inner continuous stent in a collapsed state, the cover affixed only along a single longitudinal axis outside the inner, continuous stent to at least two points along the inner continuous stent; c) the fabric cover conforming in an outer diameter to an inner diameter of an artery in which it will be positioned and an expansible outer stent in the form of a spiraling wire around the fabric cover to secure the fabric cover to the inner continuous stent; d) the outer stent having a lesser longitudinal length than the inner stent; and e) an outer diameter of the inner stent being substantially equivalent to an inner diameter of the fabric cover when the inner stent is radially expanded.
Claim 2
Dependent Claim
147 words
A stent assembly comprising: a) an inner continuous stent extending along the entire length of the assembly having spaced ends; b) a fabric cover folded over the entire inner continuous stent in a collapsed state, the cover affixed only along a single longitudinal axis outside the inner, continuous stent to at least two points along the inner continuous stent; c) the fabric cover conforming in an outer diameter to an inner diameter of an artery in which it will be positioned and an expansible outer stent in the form of a spiraling wire around the fabric cover to secure the fabric cover to the inner continuous stent; d) the outer stent having a lesser longitudinal length than the inner stent; and e) an outer diameter of the inner stent being substantially equivalent to an inner diameter of the fabric cover when the inner stent is radially expanded.
Claim 3
Dependent Claim
13 words
The stent assembly of claim 1 wherein the inner continuous stent is tubular.
Claim 4
Dependent Claim
27 words
The stent assembly of claim 1 wherein the cover is affixed to the inner stent along a line parallel to a longitudinal axis of the inner stent.
Claim 5
Dependent Claim
20 words
The stent assembly of claim 1 , wherein the spiraling wire consists of at least two spaced apart narrow bands.
Claim 6
Dependent Claim
19 words
The stent assembly according to claim 1 , wherein the spiraling wire is made of a titanium nickel alloy.
Claim 7
Dependent Claim
67 words
A stent assembly comprising: a) a tubular inner continuous stent having spaced ends; b) a fabric cover folded over the entire inner continuous stent in a collapsed state the cover affixed outside the inner stent; c) securement means consisting of an outer spiraling wire stent over the fabric cover; and d) the outer spiraling wire stent having a lessor longitudinal length than the tubular inner continuous stent.
Claim 8
Dependent Claim
67 words
A stent assembly comprising: a) a tubular inner continuous stent having spaced ends; b) a fabric cover folded over the entire inner continuous stent in a collapsed state the cover affixed outside the inner stent; c) securement means consisting of an outer spiraling wire stent over the fabric cover; and d) the outer spiraling wire stent having a lessor longitudinal length than the tubular inner continuous stent.
Claim 9
Dependent Claim
21 words
The stent assembly of claim 6 , wherein the outer spiraling wire stent has a plurality of spaced apart wire bands.
Claim 10
Dependent Claim
22 words
The stent assembly of claim 7 , wherein the wire bands are spiraling closely about an outer surface of the fabric cover.
Claim 11
Dependent Claim
23 words
The stent assembly of claim 6 , wherein the fabric cover has a diameter larger than a collapsed diameter of the inner stent.
Claim 12
Dependent Claim
19 words
The stent assembly of claim 6 , wherein an end of the inner stent has a radio-opaque material thereon.
Claim 13
Dependent Claim
29 words
The stent assembly of claim 6 , wherein the fabric cover is affixed to the inner stent along a line parallel to a longitudinal axis of the inner stent.
Claim 14
Dependent Claim
18 words
The stent assembly of claim 6 , wherein the inner stent is secure non-concentrically within the fabric cover.
Claim 15
Dependent Claim
17 words
The stent assembly of claim 6 wherein the spiraling wire stent is coated with a radio-opaque matter.
Claim 16
Dependent Claim
49 words
The stent assembly of claim 6 wherein the fabric cover is coated or impregnated with a material selected from the group consisting of a growth factor, a growth factor inhibitor, an anticoagulant, a genetic therapeutic biologically derived from gene matter and a genetic therapeutic synthetically derived from gene matter.
Claim 17
Dependent Claim
26 words
The stent assembly of claim 14 wherein the coated or impregnated material is incorporated on the surface of the fabric cover with a controlled release agent.
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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) | 2004-04-09 | 2004-10-09 | 2005-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-04-09 | 2008-10-09 | 2009-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-04-09 | 2012-10-09 | 2013-04-10 | $7700.00 | Window Closed / Lapsed |