US5647858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zirconium oxide and zirconium nitride coated catheters
Assignee: Smith and Nephew Inc
•
Filing: 1995-06-06
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Granted: 1997-07-15
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Expires: 2015-06-06
Abstract
Abstract Catheters fabricated from a core or substrate of a low modulus metal coated with blue to black zirconium oxide or zirconium nitride. The coating provides enhanced thrombogenicity, biocompatibility, blood compatibility, corrosion-resistance, friction and microfretting resistance, durability, and electrical insulation, where applicable. The coatings may be applied to low modulus metallic substrates by physical or chemical vapor deposition as well as other ion-beam assisted methods. Preferably, however, for optimizing attachment strength, the catheters are fabricated from zirconium or zirconium-containing alloys and the coatings are formed by oxidizing or nitriding through an in situ method that develops a coating from and on the metal surface of the catheter, without need for depositing a coating on the metal surface.
Inventors
- 👤 James A. Davidson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:42
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/02; A61L33/027; A61F; A61F2/00; A61F2/0077; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/24; A61F2/2442; A61F2/2445; A61F2/2448; A61F2/30; A61F2/30767; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61L27/00; A61L27/02; A61L27/04; A61L27/047; A61L27/28; A61L27/30; A61L27/306; A61L27/50; A61L27/507; A61L29/00; A61L29/02; A61L29/08; A61L29/10; A61L29/106; A61L31/00; A61L31/02; A61L31/022; A61L31/08; A61L31/082; A61L31/088; A61F2/38; A61F2/88; A61F2/95; A61F2/958; A61F2002/30001; A61F2002/30003; A61F2002/3006; A61F2002/30107; A61F2210/00; A61F2210/0009; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00035; A61F2310/00089; A61F2310/00389; A61F2310/00592; A61F2310/00598; A61F2310/00634; A61F2310/00856; A61F2310/00892
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
78 words
A catheter comprising: an elongate body and a bore extending through the body for insertion of surgical instruments, the body comprising: (a) an underlying substrate of low elastic modulus metal composition, the substrate having surfaces; and (b) a corrosion-resistant, biocompatible, hemocompatible, durable, stable coating selected from the group consisting of zirconium oxides, ranging in color from blue to black, and zirconium nitrides, ranging in color from yellow to orange; said coating disposed on the surfaces of the substrate.
Claim 2
Dependent Claim
78 words
A catheter comprising: an elongate body and a bore extending through the body for insertion of surgical instruments, the body comprising: (a) an underlying substrate of low elastic modulus metal composition, the substrate having surfaces; and (b) a corrosion-resistant, biocompatible, hemocompatible, durable, stable coating selected from the group consisting of zirconium oxides, ranging in color from blue to black, and zirconium nitrides, ranging in color from yellow to orange; said coating disposed on the surfaces of the substrate.
Claim 3
Dependent Claim
17 words
The catheter of claim 1, wherein the coating is from about 0.1 to about 20 microns thick.
Claim 4
Dependent Claim
21 words
The catheter of claim 1, wherein the substrate comprises a metal selected from the group consisting of zirconium and zirconium-containing alloys.
Claim 5
Dependent Claim
26 words
The catheter of claim 3, wherein the underlying substrate includes a sub-surface zone containing diffused oxygen and the coating comprises diffusion-bonded blue to black zirconium oxides.
Claim 6
Dependent Claim
17 words
The catheter of claim 4, wherein the coating is from about 0.1 to about 20 microns thick.
Claim 7
Dependent Claim
37 words
The catheter of claim 1, wherein the elongate body further comprises a second coating selected from the group consisting of antibiotics and anticoagulants, wherein said second coating is disposed over said corrosion-resistant, biocompatible, hemocompatible, durable, stable coating.
Claim 8
Dependent Claim
20 words
The catheter of claim 1 further comprising a silver doped overlay coating over the corrosion-resistant, biocompatible, hemocompatible, durable, stable coating.
Claim 9
Dependent Claim
30 words
The catheter of claim 1 further comprising overlay coatings over the coating, said overlay coatings selected from the group consisting of amorphous diamond-like carbon, cubic zirconia, and white tetragonal zirconia.
Claim 10
Dependent Claim
14 words
The catheter of claim 1 further comprising a polymeric sheath over the elongate body.
Claim 11
Dependent Claim
20 words
The catheter of claim 1, wherein the coating is deposited on the surfaces of the substrate by chemical vapor deposition.
Claim 12
Dependent Claim
19 words
The catheter of claim 1 further comprising a boronated overlay coating over the corrosion-resistant, biocompatible, hemocompatible, durable, stable coating.
Claim 13
Dependent Claim
13 words
The catheter of claim 1, wherein the underlying substrate is a solid tube.
Claim 14
Dependent Claim
13 words
The catheter of claim 1, wherein the underlying substrate is a coiled wire.
References Cited (Backward Citations)
CA770080A
Cited
US2987352A
Cited
US3169527A
Cited
DE1943801A1
Cited
US3643658A
Cited
US3677795A
Cited
US4040129A
Cited
DE2134926A1
Cited
GB1325269A
Cited
US3685059A
Cited
US3969130A
Cited
US4145764A
Cited
US4223412A
Cited
US4159358A
Cited
CA1140215A
Cited
DE2811603A1
Cited
US4687487A
Cited
EP0038902A2
Cited
US4608051A
Cited
US4495664A
Cited
US4834756A
Cited
US4617024A
Cited
US4652459A
Cited
EP0159410A1
Cited
US4671824A
Cited
JPS618939A
Cited
JPS61180679A
Cited
US4652534A
Cited
US4728488A
Cited
US4778461A
Cited
US4714474A
Cited
US4822355A
Cited
GB2206182A
Cited
US4955911A
Cited
US5041100A
Cited
EP0410711A1
Cited
US5037438A
Cited
US5061278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-14 | 2001-01-13 | 2001-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-14 | 2005-01-13 | 2005-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-14 | 2009-01-13 | 2009-07-15 | $7700.00 | Window Closed / Lapsed |