Patent US4840623A successfully refreshed from Google Patents.
US4840623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical catheter with splined internal wall
Assignee: Zeon Corp
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Filing: 1988-02-01
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Granted: 1989-06-20
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Expires: 2008-02-01
Abstract
Abstract Medical catheters with splined internal walls are disclosed as having sufficient rigidity to transmit torque from the proximal end to the distal end even over the long distances required for angioplast procedures. The splined geometry obviates the need for mesh layers characteristic of prior art guiding or diagnostic catheters and thus are significantly narrower and less costly to produce.
Inventors
- 👤 John Quackenbush
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:00
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0045; A61M25/0021; A61M25/0023; A61M2025/0062
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A catheter adapted for insertion into the human body, said catheter including a flexible tube having an internal and an external wall, said internal, wall having a splined configuration, and having an outer shell, said outer shell having an internal wall and an external wall, said internal wall of said outer shell having a geometry to match the geometry of the external wall of said inner tube and being integral herewith.
Claim 2
Dependent Claim
71 words
A catheter adapted for insertion into the human body, said catheter including a flexible tube having an internal and an external wall, said internal, wall having a splined configuration, and having an outer shell, said outer shell having an internal wall and an external wall, said internal wall of said outer shell having a geometry to match the geometry of the external wall of said inner tube and being integral herewith.
Claim 3
Dependent Claim
21 words
A catheter in accordance with claim 2 wherein said outer wall of said inner tube and said outer shell are circular.
Claim 4
Dependent Claim
17 words
A catheter in accordance with claim 1 wherein said outer wall of said inner tube is splined.
Claim 5
Dependent Claim
29 words
A catheter in accordance with claim 1 wherein said inner tube comprises 74 durometer biocompatible, medical grade polyurethane and said outer shell comprises a medium density, block polyimide material.
Claim 6
Dependent Claim
23 words
A catheter in accordance with claim 1 having proximal and distal ends, and manipulator means attached to said catheter at said proximal end.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |