Patent US4820950A successfully refreshed from Google Patents.
Patent US4643716A successfully refreshed from Google Patents.
US4643716A
Expired / Lapsed
US
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Multi-size ureteral stent
Assignee: Kendall Co
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Filing: 1986-05-15
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Granted: 1987-02-17
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Expires: 2006-05-15
Abstract
Abstract A ureteral stent comprising, a catheter having a hollow elongated generally straight body portion, a retaining portion for retaining the catheter in the kidney of a patient adjacent a distal end of the body portion, and a proximal end portion extending proximally from the body portion, with the end portion being formed in a serpentine configuration which may be cut to length depending upon the length of the patient's ureter.
Inventors
- 👤 George W. Drach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:56
CPC Classifications
A; A61; A61M; A61M27/00; A61M27/002; A61M27/008; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2002/048
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
115 words
A ureteral stent, comprising: a catheter having a hollow elongated generally straight body portion, means for retaining the catheter in the kidney of a patient adjacent a distal end of the body portion, and a proximal end portion extending proximally from the body portion, said end portion being formed in a serpentine configuration disposed in a plane which may be cut to length depending upon the length of the patient's ureter, and a distal part of the remaining end portion may be straightened for alignment with the body portion and placement in the ureter while a part of the serpentine configuration proximal the straightened portion is maintained in the stent for placement in the bladder.
Claim 2
Dependent Claim
115 words
A ureteral stent, comprising: a catheter having a hollow elongated generally straight body portion, means for retaining the catheter in the kidney of a patient adjacent a distal end of the body portion, and a proximal end portion extending proximally from the body portion, said end portion being formed in a serpentine configuration disposed in a plane which may be cut to length depending upon the length of the patient's ureter, and a distal part of the remaining end portion may be straightened for alignment with the body portion and placement in the ureter while a part of the serpentine configuration proximal the straightened portion is maintained in the stent for placement in the bladder.
Claim 3
Dependent Claim
13 words
The stent of claim 1 wherein the retaining means comprises a pig tail.
Claim 4
Dependent Claim
41 words
The stent of claim 1 including a plurality of apertures disposed along the length of the catheter and extending through a wall of the catheter such that they communicate between a lumen in the catheter and the outside of the catheter.
References Cited (Backward Citations)
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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) | 1990-02-16 | 1990-08-18 | 1991-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-16 | 1994-08-18 | 1995-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-16 | 1998-08-18 | 1999-02-17 | $7700.00 | Window Closed / Lapsed |