Patent US5542937A successfully refreshed from Google Patents.
US5542937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilumen extruded catheter
Assignee: Target Therapeutics Inc
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Filing: 1994-06-24
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Granted: 1996-08-06
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Expires: 2014-06-24
Abstract
Abstract This invention is a surgical device. In particular, it is a multilumen catheter having a shaft, at least a portion of which is continuously extruded and undergoes a change in polymer composition during that extension. The invention includes the substituent shaft per se and a method of making the shaft.
Inventors
- 👤 Hiram Chee
- 👤 Mark Glowacki
- 👤 Laurent Schaller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; B; B29; B29C; B29C48/00; B29C48/25; B29C48/269; B29C48/2692; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/0032; A61M25/0043; A61M25/0045; A61M25/0054
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
118 words
A multilumen catheter shaft having a distal end, a proximal end, and a longitudinal axis extending between said distal end and proximal end, said shaft having at least two discrete lumens sharing a common wall between said distal and proximal ends, at least one of said discrete lumens being defined by multiple circumferential layers, at least two of said circumferential layers comprising different polymers, and where the shaft along the longitudinal axis is divided into at least two sectors between those ends having transition regions between said sectors, each said sector having a flexibility normal to the longitudinal axis different from an adjacent sector, where said shaft has been continuously extruded between said distal to said proximal end.
Claim 2
Dependent Claim
118 words
A multilumen catheter shaft having a distal end, a proximal end, and a longitudinal axis extending between said distal end and proximal end, said shaft having at least two discrete lumens sharing a common wall between said distal and proximal ends, at least one of said discrete lumens being defined by multiple circumferential layers, at least two of said circumferential layers comprising different polymers, and where the shaft along the longitudinal axis is divided into at least two sectors between those ends having transition regions between said sectors, each said sector having a flexibility normal to the longitudinal axis different from an adjacent sector, where said shaft has been continuously extruded between said distal to said proximal end.
Claim 3
Dependent Claim
27 words
The catheter shaft of claim 1 wherein the transition regions between the sectors are shorter in axial length than the sectors and have flexibility which increase distally.
Claim 4
Dependent Claim
40 words
The catheter shaft of claim 1 wherein the shaft has a first lumen having a first cross-sectional area and a second lumen having a second cross-sectional area and the first cross-sectional area is relatively larger than the second cross-sectional area.
Claim 5
Dependent Claim
14 words
The catheter shaft of claim 1 where the shaft has more than two lumens.
Claim 6
Dependent Claim
22 words
The catheter shaft of claim 1 where the transition regions have axial length and comprise mixtures of the materials comprising adjacent sectors.
Claim 7
Dependent Claim
27 words
The catheter shaft of claim 1 wherein the sectors comprise polymers selected from the group consisting of polyethylene, polypropylene, polyurethane, polyvinyl chloride, their blends, alloys, and copolymers.
Claim 8
Dependent Claim
17 words
The catheter shaft of claim 6 wherein the sectors comprise polymers which are miscible with each other.
Claim 9
Dependent Claim
20 words
The catheter shaft of claim 1 in which the shaft has an outer diameter of no greater than 0.120 inches.
Claim 10
Dependent Claim
24 words
The catheter shaft of claim 1 in which at least one sector of the shaft comprises wall sections containing multiple layers of different polymers.
Claim 11
Dependent Claim
23 words
The catheter shaft of claim 9 in which each sector of the shaft comprises a wall section layer having a single common polymer.
Claim 12
Dependent Claim
114 words
A multilumen catheter shaft having a distal end, a proximal end, and a longitudinal axis extending between said distal end and proximal end, said shaft having at least two discrete lumens sharing a common wall between said distal and proximal ends, and where the shaft along the longitudinal axis is divided into at least two sectors between those ends having transition regions between said sectors, each said sector having a flexibility normal to the longitudinal axis different from an adjacent sector, and at least two of said sectors having different outer diameters and comprising at least in part different polymers, where said shaft has been continuously extruded between said distal and said proximal end.
Claim 13
Dependent Claim
114 words
A multilumen catheter shaft having a distal end, a proximal end, and a longitudinal axis extending between said distal end and proximal end, said shaft having at least two discrete lumens sharing a common wall between said distal and proximal ends, and where the shaft along the longitudinal axis is divided into at least two sectors between those ends having transition regions between said sectors, each said sector having a flexibility normal to the longitudinal axis different from an adjacent sector, and at least two of said sectors having different outer diameters and comprising at least in part different polymers, where said shaft has been continuously extruded between said distal and said proximal end.
Claim 14
Dependent Claim
27 words
The catheter shaft of claim 11 wherein the transition regions between the sectors are shorter in axial length than the sectors and have flexibility which increase distally.
Claim 15
Dependent Claim
20 words
The catheter shaft of claim 11 wherein the shaft has three sectors between the distal end and the proximal end.
Claim 16
Dependent Claim
27 words
The catheter shaft of claim 13 wherein the transition regions between the sectors are shorter in axial length than the sectors and have flexibility which increases distally.
Claim 17
Dependent Claim
40 words
The catheter shaft of claim 11 where the shaft has a first lumen having a first cross-sectional area and a second lumen having a second cross-sectional area and the first cross-sectional area is relatively larger than the second cross-sectional area.
Claim 18
Dependent Claim
14 words
The catheter shaft of claim 11 where the shaft has more than two lumens.
Claim 19
Dependent Claim
22 words
The catheter shaft of claim 11 where the transition regions have axial length and comprise mixtures of the materials comprising adjacent sectors.
Claim 20
Dependent Claim
27 words
The catheter shaft of claim 11 wherein the sectors comprise polymers selected from the group consisting of polyethylene, polypropylene, polyurethane, polyvinyl chloride, their blends, alloys, and co-polymers.
Claim 21
Dependent Claim
17 words
The catheter shaft of claim 18 wherein the sector comprise polymers which are miscible with each other.
Claim 22
Dependent Claim
19 words
The catheter shaft of claim 11 in which the shaft has an outer diameter no greater than 0.120 inches.
Claim 23
Dependent Claim
24 words
The catheter shaft of claim 11 in which at least one sector of the shaft comprises wall sections containing multiple layers of different polymers.
Claim 24
Dependent Claim
23 words
The catheter shaft of claim 21 in which each sector of the shaft comprises a wall section layer having a single common polymer.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |