Patent US5256158A successfully refreshed from Google Patents.
US5256158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device having a radiopaque marker for endoscopic accessories and method of making same
Assignee: Credit Suisse AG Cayman Islands Branch
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Filing: 1991-05-17
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Granted: 1993-10-26
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Expires: 2011-05-17
Abstract
Abstract A plastic catheter and a method for making the same, the catheter having radiopaque marker ring placed within a tube, whereby the radiopaque ring is inserted into the expanded section of the tube, followed by the relaxation of the tube to its original dimensions, such that there is no protusion of the ring on the tube inner-diameter, where the ring inner-diameter is equal or greater than the tube inner-diameter, and the ring outer-diameter protrudes a distance into the tube but not beyond the thickness of the tube; thereby, creating a smooth outer surface and an obstruction free inner surface.
Inventors
- 👤 M. Joshua Tolkoff
- 👤 Fernando Alvarez de Toledo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:54
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/012; A61B6/00; A61B6/12; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
174 words
A device having a radiopaque marker ring for use with endoscopic accessories comprising: a tube defining a lumen and a radiopaque ring, wherein said tube has a tube inner-diameter and a tube outer-diameter and said radiopaque ring has a ring inner-diameter and a ring outer-diameter, such that said ring inner-diameter is equal to said tube inner-diameter, but that said ring outer-diameter is less than said tube outer-diameter, wherein said ring is disposed completely within said lumen of the tube, a distance away from either end of said tube, and detached from objects other than the tube, wherein said ring, having an inner and outer surface, is positioned such that said inner surface of said ring is exposed to said lumen of said tube and said outer surface of said ring is embedded within said tube, so that said tube with said radiopaque ring presents a continuous, non-obstructed, pathway and a smooth, bump-free inner and outer surface, and the overall thickness of said tube, caused by the inclusion therein of said marker ring, is minimized.
Claim 2
Independent Claim
174 words
A device having a radiopaque marker ring for use with endoscopic accessories comprising: a tube defining a lumen and a radiopaque ring, wherein said tube has a tube inner-diameter and a tube outer-diameter and said radiopaque ring has a ring inner-diameter and a ring outer-diameter, such that said ring inner-diameter is equal to said tube inner-diameter, but that said ring outer-diameter is less than said tube outer-diameter, wherein said ring is disposed completely within said lumen of the tube, a distance away from either end of said tube, and detached from objects other than the tube, wherein said ring, having an inner and outer surface, is positioned such that said inner surface of said ring is exposed to said lumen of said tube and said outer surface of said ring is embedded within said tube, so that said tube with said radiopaque ring presents a continuous, non-obstructed, pathway and a smooth, bump-free inner and outer surface, and the overall thickness of said tube, caused by the inclusion therein of said marker ring, is minimized.
Claim 3
Dependent Claim
17 words
The device of claim 1, wherein said tube is a catheter constructed of a flexible plastic material.
Claim 4
Dependent Claim
16 words
The device of claim 1, wherein said tube is a catheter constructed of flexible TFE material.
Claim 5
Dependent Claim
21 words
The device of claim 1, wherein said tube is a catheter constructed of a flexible plastic material and coated with TFE.
Claim 6
Dependent Claim
21 words
The device of claim 1, wherein said tube with said radiopaque ring disposed within said tube has a smooth outer surface.
Claim 7
Independent Claim
77 words
A method of constructing a device having a radiopaque marker for use in endoscopic accessories comprising: providing a tube; expanding said tube to create an expanded-end-section; inserting a radiopaque ring, having an inner and outer surface, inside said expanded-end-section of said tube, such that said ring inner-surface is exposed to the said lumen of said tube and said ring outer-surface is embedded in said tube; shrinking said expanded-end-section so that said tube returns to its original dimensions.
Claim 8
Independent Claim
77 words
A method of constructing a device having a radiopaque marker for use in endoscopic accessories comprising: providing a tube; expanding said tube to create an expanded-end-section; inserting a radiopaque ring, having an inner and outer surface, inside said expanded-end-section of said tube, such that said ring inner-surface is exposed to the said lumen of said tube and said ring outer-surface is embedded in said tube; shrinking said expanded-end-section so that said tube returns to its original dimensions.
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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) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |