Patent US3255923A successfully refreshed from Google Patents.
US6425909B1
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Methods and devices for filtering fluid flow through a body structure
Assignee: Stryker Corp
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Filing: 1999-11-04
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Granted: 2002-07-30
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Expires: 2019-11-04
Abstract
Abstract An intravascular filter having a filament which expands a filter element. The filament is a coil which is stretched to reduce the diameter of the coil for introduction. The filter element is preferably biased toward the closed position and is opened by the coil when tension is released on the coil. The filament slides along the internal surface of the filter element so that the filter element may assume intermediate positions.
Inventors
- 👤 Martin S. Dieck
- 👤 Brian B. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/01; A61F2/0105; A61F2/011; A61F2002/018; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0006; A61F2230/0063; A61F2230/0067; A61F2250/00; A61F2250/0014; A61F2250/0039
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
133 words
A method of filtering flow through a vessel, comprising the steps of: providing a filter device having a wire and a filter element, the filter element being movable between a collapsed position and an expanded position, the filter element being naturally biased toward the collapsed position, the wire also having a collapsed shape and an expanded shape, the wire being tensioned to hold the wire in the collapsed shape; introducing the filter device into a patient; positioning the filter element at a desired location; and advancing the wire into the filter element so that the wire expands the filter element toward the expanded position, the wire sliding against an interior surface of the filter element and being free to move relative to the filter element at all locations proximal to a distal end.
Claim 2
Independent Claim
133 words
A method of filtering flow through a vessel, comprising the steps of: providing a filter device having a wire and a filter element, the filter element being movable between a collapsed position and an expanded position, the filter element being naturally biased toward the collapsed position, the wire also having a collapsed shape and an expanded shape, the wire being tensioned to hold the wire in the collapsed shape; introducing the filter device into a patient; positioning the filter element at a desired location; and advancing the wire into the filter element so that the wire expands the filter element toward the expanded position, the wire sliding against an interior surface of the filter element and being free to move relative to the filter element at all locations proximal to a distal end.
Claim 3
Dependent Claim
22 words
The method of claim 1 , wherein: the providing step is carried out with the wire forming coils in the expanded position.
Claim 4
Dependent Claim
18 words
The method of claim 1 , further comprising the step of: compressing the wire after the releasing step.
Claim 5
Dependent Claim
30 words
The method of claim 1 , wherein: the providing step is carried out with the wire wrapped around a core element, the filter element being mounted to the core element.
Claim 6
Independent Claim
128 words
A method of filtering flow through a vessel, comprising the steps of: providing a filter device having a wire and a filter element, the filter element being movable between a collapsed position and an expanded position, the filter element being naturally biased toward the collapsed position, the wire also having a collapsed shape and an expanded shape, the wire being tensioned to hold the wire in the collapsed shape; introducing the filter device into a patient; and releasing at least some tension on the wire so that the wire expands toward the expanded position and expands the filter element, the wire sliding against an interior surface of the filter element and being free to move relative to the filter element at all locations proximal to a distal end.
Claim 7
Independent Claim
128 words
A method of filtering flow through a vessel, comprising the steps of: providing a filter device having a wire and a filter element, the filter element being movable between a collapsed position and an expanded position, the filter element being naturally biased toward the collapsed position, the wire also having a collapsed shape and an expanded shape, the wire being tensioned to hold the wire in the collapsed shape; introducing the filter device into a patient; and releasing at least some tension on the wire so that the wire expands toward the expanded position and expands the filter element, the wire sliding against an interior surface of the filter element and being free to move relative to the filter element at all locations proximal to a distal end.
Claim 8
Dependent Claim
22 words
The method of claim 5 , wherein: the providing step is carried out with the wire forming coils in the expanded position.
Claim 9
Dependent Claim
18 words
The method of claim 5 , further comprising the step of: compressing the wire after the releasing step.
Claim 10
Dependent Claim
30 words
The method of claim 5 , wherein: the providing step is carried out with the wire wrapped around a core element, the filter element being mounted to the core element.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-07-29 | 2006-01-28 | 2006-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-07-29 | 2010-01-28 | 2010-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-07-29 | 2014-01-28 | 2014-07-30 | $7700.00 | Window Closed / Lapsed |