US5406960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guidewire with integral core and marker bands
Assignee: Cordis Corp
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Filing: 1994-04-13
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Granted: 1995-04-18
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Expires: 2014-04-13
Abstract
Abstract A guidewire, such as for percutaneous angioplasty, having a radiopaque internal corewire and a spring of radiopaque material at a distal tip portion of the corewire. A plurality of alternating grooves and bands are integrally formed from the corewire in a section adjacent the tip portion of the corewire. A plastic sleeve is attached to the corewire around the integral radiopaque bands.
Inventors
- 👤 Philip P. Corso, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:08
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09166; A61M2025/09175
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
77 words
A guidewire comprising: a) an elongated corewire having a tapered first section at a far distal portion of the corewire, and a tapered second section proximal to said first section; b) a coiled radiopaque spring surrounding said first section of said corewire and attached to said corewire; and c) a plurality of grooves cut into said second section of said corewire with each pair of adjacent grooves defining therebetween a marker band unitary with the core wire.
Claim 2
Dependent Claim
77 words
A guidewire comprising: a) an elongated corewire having a tapered first section at a far distal portion of the corewire, and a tapered second section proximal to said first section; b) a coiled radiopaque spring surrounding said first section of said corewire and attached to said corewire; and c) a plurality of grooves cut into said second section of said corewire with each pair of adjacent grooves defining therebetween a marker band unitary with the core wire.
Claim 3
Dependent Claim
18 words
The guidewire according to claim 1, further comprising a sleeve disposed around said corewire in said second section.
Claim 4
Dependent Claim
19 words
The guidewire according to claim 2, wherein said sleeve comprises at least one of a polymer and a polyimide.
Claim 5
Dependent Claim
17 words
The guidewire according to claim 3, wherein said sleeve comprises at least one of polyethylene and polytetrafluoroethylene.
Claim 6
Dependent Claim
19 words
The guidewire according to claim 1, wherein said coiled radiopaque spring is soldered, brazed or epoxy-bonded to said corewire.
Claim 7
Dependent Claim
18 words
The guidewire according to claim 2, wherein said sleeve is heat bonded, swaged or melted to said corewire.
Claim 8
Dependent Claim
26 words
The guidewire according to claim 1, wherein said corewire and integral radiopaque bands comprise at least one of gold, nitinol, platinum, titanium, tantalum and stainless steel.
Claim 9
Dependent Claim
20 words
The guidewire according to claim 1, wherein said corewire and integral radiopaque bands comprise a polymer with a metallic slurry.
Claim 10
Dependent Claim
16 words
The guidewire according to claim 8, wherein said metallic slurry is a titanium or tantalum slurry.
Claim 11
Dependent Claim
19 words
The guidewire according to claim 1, wherein said corewire is made of a less radiopaque material than said spring.
Claim 12
Independent Claim
99 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by cutting a plurality of grooves at predetermined positions into said second section of said corewire with each pair of adjacent grooves defining therebetween a marker band unitary with the corewire.
Claim 13
Independent Claim
99 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by cutting a plurality of grooves at predetermined positions into said second section of said corewire with each pair of adjacent grooves defining therebetween a marker band unitary with the corewire.
Claim 14
Dependent Claim
24 words
The method according to claim 11, further comprising attaching a spring to said corewire so as to surround said first section of said corewire.
Claim 15
Dependent Claim
16 words
The method of claim 12, wherein said corewire and said spring are formed of radiopaque materials.
Claim 16
Dependent Claim
22 words
The method of claim 13, wherein said radiopaque materials comprise at least one of titanium, tantalum, nitinol, platinum, gold, and stainless steel.
Claim 17
Dependent Claim
17 words
The method of claim 11, wherein the corewire is formed by drawing through successively smaller sizing dies.
Claim 18
Dependent Claim
18 words
The method of claim 13, wherein said corewire is made of a less radiopaque material than said spring.
Claim 19
Independent Claim
146 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by grinding a plurality of grooves at predetermined position along said second section of said corewire such that said bands are formed integrally from said corewire; the method further comprising attaching a spring to said corewire so as to surround said first section of said corewire, said corewire and said spring being formed of radiopaque materials; and attaching a sleeve to said corewire so as to surround said unitary marker bands in said second section of said sleeve.
Claim 20
Independent Claim
146 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by grinding a plurality of grooves at predetermined position along said second section of said corewire such that said bands are formed integrally from said corewire; the method further comprising attaching a spring to said corewire so as to surround said first section of said corewire, said corewire and said spring being formed of radiopaque materials; and attaching a sleeve to said corewire so as to surround said unitary marker bands in said second section of said sleeve.
Claim 21
Independent Claim
159 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by grinding a plurality of grooves at predetermined position along said second section of said corewire such that said bands are formed integrally from said corewire; the method further comprising attaching a spring to said corewire so as to surround said first section of said corewire, said corewire and said spring being formed of radiopaque materials which comprise at least one of titanium, tantalum, nitinol, platinum, gold, and stainless steel; and wherein said unitary marker bands are formed to have a height progressively decreasing toward said first section of said corewire.
Claim 22
Independent Claim
159 words
A method of making a guidewire comprising: a) extruding or drawing a rod to form a corewire of predetermined thickness; b) forming a taper in said corewire by grinding so as to achieve a desired degree of taper in adjacent first and second sections of said corewire; and c) forming alternating grooves and bands in the second section of said corewire which is proximal to said first section, by grinding a plurality of grooves at predetermined position along said second section of said corewire such that said bands are formed integrally from said corewire; the method further comprising attaching a spring to said corewire so as to surround said first section of said corewire, said corewire and said spring being formed of radiopaque materials which comprise at least one of titanium, tantalum, nitinol, platinum, gold, and stainless steel; and wherein said unitary marker bands are formed to have a height progressively decreasing toward said first section of said corewire.
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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) | 1998-04-17 | 1998-10-17 | 1999-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-17 | 2002-10-17 | 2003-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-17 | 2006-10-17 | 2007-04-18 | $7700.00 | Window Closed / Lapsed |