US4504268A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stiffening core for a catheter tube
Assignee: B Braun Surgical AG
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Filing: 1982-11-02
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Granted: 1985-03-12
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Expires: 2002-11-02
Abstract
Abstract A stiffening core of plastic for the gap-free filling of the lumen (i.e., bore) of a catheter tube comprises at least one resilient multifilament strand of high tensile strength which is embedded in a plastic rod. Such a stiffening core contributes to improving the catheter tube's suitability for projection on an x-ray screen.
Inventors
- 👤 Gerhard Herlitze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:06
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0108; A61M25/09; A61M2025/09058; A61M2025/09075
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
60 words
Catheter apparatus comprising a tubular catheter and a stiffening core, said catheter having a lumen, said stiffening core comprising a cylindrical plastic rod, said rod being disposed in said lumen in gap-free relationship therewith and being slidably removable from said lumen, said rod comprising at least one resilient multifilament strand of high tensile strength and uniform diameter fixedly embedded therein.
Claim 2
Dependent Claim
60 words
Catheter apparatus comprising a tubular catheter and a stiffening core, said catheter having a lumen, said stiffening core comprising a cylindrical plastic rod, said rod being disposed in said lumen in gap-free relationship therewith and being slidably removable from said lumen, said rod comprising at least one resilient multifilament strand of high tensile strength and uniform diameter fixedly embedded therein.
Claim 3
Dependent Claim
18 words
A stiffening core according to claim 1, characterized by having a single strand embedded concentrically in said rod.
Claim 4
Dependent Claim
18 words
A stiffening core according to claim 1, characterized in that said strand consists of monofilaments of different materials.
Claim 5
Dependent Claim
19 words
A stiffening core according to claim 1, characterized in that said strand consists of monofilaments of a single material.
Claim 6
Dependent Claim
19 words
A stiffening core according to claim 4, characterized in that said strand consists of monofilaments of a nonrusting steel.
Claim 7
Dependent Claim
17 words
A stiffening core according to claim 1, characterized in that said monofilaments are of equal cross-sectional area.
Claim 8
Dependent Claim
20 words
A stiffening core according to claim 1, characterized in that said monofilaments of the strand have mutually varying cross-sectional areas.
Claim 9
Dependent Claim
19 words
A stiffening core according to claim 1, characterized in that the lay of the strand is left-hand or right-hand.
Claim 10
Dependent Claim
20 words
A stiffening core according to claim 1, characterized in that said rod is comprised of a plurality of plastic materials.
Claim 11
Dependent Claim
26 words
A stiffening core according to claim 1, characterized in that a highly flexible tip of plastic is firmly connected to the insertion end of said core.
Claim 12
Dependent Claim
14 words
A stiffening core according to claim 10, characterized in that said tip is hollow.
Claim 13
Dependent Claim
14 words
A stiffening core according to claim 10, characterized in that the tip is solid.
References Cited (Backward Citations)
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US3572333A
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US4362163A
Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |