Patent US6022341A successfully refreshed from Google Patents.
US6022341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter with multiple internal diameters
Assignee: Medtronic Inc
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Filing: 1997-10-03
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Granted: 2000-02-08
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Expires: 2017-10-03
Abstract
Abstract There is disclosed a medical catheter comprising a proximal shaft section and a distal shaft section. The proximal shaft section has an inner diameter and wall thickness which is constant over the length of the proximal shaft section. The distal shaft section has an inner diameter which is greater than the proximal shaft inner diameter and has a step up or taper therebetween. The proximal end of the distal shaft section is aligned proximal to the proximal end of a curved portion of the guiding catheter's distal shaft section.
Inventors
- 👤 David J. Lentz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:41
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/01; A61M25/06; A61M25/0662; A61M25/008; A61M2025/0081; A61M25/0021; A61M25/0023; A61M25/0069
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
121 words
A medical catheter comprising: a proximal shaft section having an inner diameter, outer diameter and a wall thickness, the inner diameter being constant over the length of the proximal shaft section, the wall thickness being constant over the length of the proximal shaft; a distal shaft section having an inner diameter, outer diameter and a wall thickness, the distal shaft section inner diameter being greater than the proximal shaft section inner diameter, the distal end of the proximal shaft section being connected to the proximal end of the distal shaft section by a step up and wherein a proximal end of the distal shaft section is aligned proximal to the proximal end of a curved portion of the distal shaft section.
Claim 2
Dependent Claim
121 words
A medical catheter comprising: a proximal shaft section having an inner diameter, outer diameter and a wall thickness, the inner diameter being constant over the length of the proximal shaft section, the wall thickness being constant over the length of the proximal shaft; a distal shaft section having an inner diameter, outer diameter and a wall thickness, the distal shaft section inner diameter being greater than the proximal shaft section inner diameter, the distal end of the proximal shaft section being connected to the proximal end of the distal shaft section by a step up and wherein a proximal end of the distal shaft section is aligned proximal to the proximal end of a curved portion of the distal shaft section.
Claim 3
Dependent Claim
38 words
The catheter according to claim 1 wherein the step up is a taper which forms a smooth and gradual transition between the inner diameter of the proximal shaft section and the inner diameter of the distal shaft section.
Claim 4
Dependent Claim
14 words
The catheter according to claim 2 wherein the taper is formed by thermal welding.
Claim 5
Dependent Claim
20 words
The catheter according to claim 1 wherein the distal shaft section inner diameter is sized to slidingly receive interventional devices.
Claim 6
Dependent Claim
31 words
The catheter according to claim 1 wherein the inner diameter of the distal shaft section is 0.002 inches to 0.004 inches larger than the inner diameter of the proximal shaft section.
Claim 7
Dependent Claim
25 words
The catheter according to claim 1 wherein the inner diameter of the distal shaft section remains constant over the length of the distal shaft section.
Claim 8
Dependent Claim
25 words
The catheter according to claim 1 wherein the wall thickness of the distal shaft section remains constant over the length of the distal shaft section.
Claim 9
Dependent Claim
26 words
The catheter according to claim 1 wherein the outer diameter of the proximal shaft section is equal to the outer diameter of the distal shaft section.
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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) | 2003-02-07 | 2003-08-09 | 2004-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-07 | 2007-08-09 | 2008-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-07 | 2011-08-09 | 2012-02-08 | $7700.00 | Window Closed / Lapsed |