Patent US5542924A successfully refreshed from Google Patents.
US5542924A
Expired / Lapsed
US
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Method of forming a catheter having a multiple durometer
Assignee: Catheter Imaging Systems Inc
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Filing: 1995-01-13
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Granted: 1996-08-06
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Expires: 2015-01-13
Abstract
Abstract The catheter has a housing of such a size as to be readily held in the hand of the user, and a tubular proximal portion connected to and extending from the housing. The proximal portion is formed of a flexible polymeric material. The distal portion is coaxial with and is adjacent to the proximal portion. The distal portion is also formed of a flexible polymeric material and it has substantially the same outer circumference as the proximal portion. The distal portion is more flexible than the medial portion. A pair of control wires extend longitudinally through the proximal and distal portions and parallel to the axis of the coaxial portions for bending the flexible portions in response to movement of the control wires. A control is carried by the housing for controlling the movement of the control wires to thereby bend the flexible portions and remotely manipulate the catheter within a human body.
Inventors
- 👤 Phillip J. Snoke
- 👤 David S. Rowley
- 👤 David G. Lincoln
- 👤 Kirk W. Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:54
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0133; A61M25/0141; A61B; A61B1/00; A61B1/005; A61B1/0051; A61B1/0057; A61M25/0136; A61M25/0147; A61B1/313; A61B1/3132; A61M2025/015; A61M25/0009
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A method of forming a catheter having a multiple durometer hardness for easily inserting into a vessel or cavity of the human body, comprising the steps of: welding together elongate coaxial tube portions formed of a polymeric material and having substantially the same outer circumference and variable flexibility with respect to each other to thereby integrally form a one-piece elongate tube.
Claim 2
Independent Claim
61 words
A method of forming a catheter having a multiple durometer hardness for easily inserting into a vessel or cavity of the human body, comprising the steps of: welding together elongate coaxial tube portions formed of a polymeric material and having substantially the same outer circumference and variable flexibility with respect to each other to thereby integrally form a one-piece elongate tube.
Claim 3
Dependent Claim
19 words
A method of forming a catheter according to claim 1, wherein the step of welding comprises radio frequency welding.
Claim 4
Dependent Claim
18 words
A method of forming a catheter according to claim 1, wherein the step of welding comprises sonic welding.
Claim 5
Dependent Claim
29 words
A catheter according to claim 1, further comprising the step of extruding the polymeric material to form the tube portions of varying flexibilities prior to the step of welding.
Claim 6
Dependent Claim
54 words
A method of forming a catheter according to claim 1, further comprising the following steps prior to the step of welding: forming a distal tube portion from a polymeric material; and forming a proximal tube portion from a polymeric material, the proximal tube having substantially the same outer circumference as the distal tube portion.
Claim 7
Dependent Claim
44 words
A method of forming a catheter according to claim 1, further comprising the step of forming a convergent tip of an end portion of the integrally formed one-piece elongate tube for ease of access into and through a body vessel, cavity, skin or tissue.
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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) | 1999-08-06 | 2000-02-05 | 2000-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-06 | 2004-02-05 | 2004-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-06 | 2008-02-05 | 2008-08-06 | $7700.00 | Window Closed / Lapsed |