Patent US4509517A successfully refreshed from Google Patents.
US5984947A
Expired / Lapsed
US
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Removable thrombus filter
Assignee: Lifescreen Sciences LLC
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Filing: 1998-05-04
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Granted: 1999-11-16
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Expires: 2018-05-04
Abstract
Abstract A thrombus filter configured for placement within a blood vessel lumen. The filter having a longitudinal axis. The filter includes first and second units, each unit including a plurality of elongated struts. Each strut has a joining end where the respective struts of each unit are joined together. Each strut also has a free end opposite the joining end. The struts have at least two curves such that in a longitudinal planar projection of the filter, each strut has a first direction of curvature proximate the joining end and an opposite direction of curvature closer to the free end. In a transverse planar projection of the filter, the strut has a first direction of curvature proximate the joining and an opposite direction of curvature closer to the free end. The units can be coupled together in opposition such that the free ends of the struts of the first unit are generally oriented in a first longitudinal direction and the free ends of the struts of the second unit are generally oriented in the opposite longitudinal direction.
Inventors
- 👤 Scott R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12168; A61B2017/1205; A61F2002/016; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/005; A61F2230/0063; A61F2230/0073; A61F2230/0078; A61F2230/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
218 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; each strut of the first unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then curves in a longitudinal direction close to the free end; each strut of the second unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then turns in a longitudinal direction closer to the free end; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented in a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; a sharpened tip longitudinally projecting from the free end of each strut; a flexible pad proximate the sharpened tip; and a streamlined encapsulation over a portion of the struts and the coupling.
Claim 2
Dependent Claim
218 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; each strut of the first unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then curves in a longitudinal direction close to the free end; each strut of the second unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then turns in a longitudinal direction closer to the free end; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented in a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; a sharpened tip longitudinally projecting from the free end of each strut; a flexible pad proximate the sharpened tip; and a streamlined encapsulation over a portion of the struts and the coupling.
Claim 3
Dependent Claim
176 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; each strut of the first unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then curves in a longitudinal direction close to the free end; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented at a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; a sharpened tip longitudinally projecting from the free end of each strut; a pad proximate the sharpened tip; and a streamlined encapsulation over a portion of the struts and the coupling.
Claim 4
Dependent Claim
176 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; each strut of the first unit extends from the joining end in generally the same longitudinal direction and then curves in a transverse direction away from the longitudinal axis and then curves in a longitudinal direction close to the free end; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented at a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; a sharpened tip longitudinally projecting from the free end of each strut; a pad proximate the sharpened tip; and a streamlined encapsulation over a portion of the struts and the coupling.
Claim 5
Dependent Claim
146 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented in a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; each strut including a flattened portion proximate the free end; the flattened portion including a longitudinal cut dividing the flattened portion into a tip portion and a pad portion; and a streamlined encapsulation over a portion of the struts and the coupling.
Claim 6
Dependent Claim
146 words
A thrombus filter for placement within a blood vessel lumen, having a longitudinal axis, the filter comprising; first and second units, each including a plurality of elongated struts, each strut having a joining end and a free end, wherein the respective struts of each unit are joined together generally about the longitudinal axis of the filter at the joining ends; a coupling, connecting the first and second units, in opposition such that the free ends of the first unit struts are generally oriented in a first longitudinal direction and the free ends of the second unit struts are generally oriented in the opposite direction; each strut including a flattened portion proximate the free end; the flattened portion including a longitudinal cut dividing the flattened portion into a tip portion and a pad portion; and a streamlined encapsulation over a portion of the struts and the coupling.
References Cited (Backward Citations)
US3334629A
Cited
US3467102A
Cited
US3540431A
Cited
US3868956A
Cited
US3952747A
Cited
US4430081A
Cited
US4425908A
Cited
US4643184A
Cited
EP0117940A2
Cited
US4494531A
Cited
US4727873A
Cited
US4619246A
Cited
FR2570288A1
Cited
US4688553A
Cited
FR2573646A1
Cited
FR2580504A1
Cited
US4662885A
Cited
US4650466A
Cited
US4793348A
Cited
US4781177A
Cited
EP0270432B1
Cited
EP0293605A1
Cited
US4817600A
Cited
US4873978A
Cited
US4998539A
Cited
US4957501A
Cited
US4990156A
Cited
US4832055A
Cited
EP0350043B1
Cited
US5152777A
Cited
US4969891A
Cited
US5242462A
Cited
US5059205A
Cited
US5035706A
Cited
EP0430848A1
Cited
US5133733A
Cited
US5108418A
Cited
US5071407A
Cited
US5234458A
Cited
EP0472334A1
Cited
US5108419A
Cited
WO1992003097A1
Cited
US5160342A
Cited
US5147379A
Cited
WO1993012723A1
Cited
US5324304A
Cited
US5370657A
Cited
US5853420A
Cited
US5601595A
Cited
US5746767A
Cited
US5669933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-11-15 | 2003-05-17 | 2003-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-11-15 | 2007-05-17 | 2007-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-11-15 | 2011-05-17 | 2011-11-16 | $7700.00 | Window Closed / Lapsed |