US5041100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter and hydrophilic, friction-reducing coating thereon
Assignee: Cordis Corp
•
Filing: 1989-04-28
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Granted: 1991-08-20
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Expires: 2009-04-28
Abstract
Abstract A friction-reducing coating may be applied to a base material, for example the outer surface of a catheter, to provide a significant reduction in catheter friction, particularly when the friction-reducing coating is hydrated. The coating comprises an intimate mixture of a structural plastic material, for example polyurethane, and high molecular weight poly(ethylene oxide).
Inventors
- 👤 Stephen M. Rowland
- 👤 Roger B. Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:25
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0045; A61L; A61L29/00; A61L29/08; A61L29/085; A61L29/14; A61L29/16; A61L2300/00; A61L2300/60; A61L2300/606
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
75 words
A plastic catheter formed of a base material having a friction-reducing coating carried on the outer surface of said base material, said friction-reducing coating being of the type that provides friction-reduction on hydration thereof, said coating comprising an intimate physical mixture of 50 to 98 weight percent of a structural plastic material and 2 to 50 weight percent of poly(ethylene oxide), said base material consisting essentially of a plastic essentially free of said poly(ethylene oxide).
Claim 2
Dependent Claim
75 words
A plastic catheter formed of a base material having a friction-reducing coating carried on the outer surface of said base material, said friction-reducing coating being of the type that provides friction-reduction on hydration thereof, said coating comprising an intimate physical mixture of 50 to 98 weight percent of a structural plastic material and 2 to 50 weight percent of poly(ethylene oxide), said base material consisting essentially of a plastic essentially free of said poly(ethylene oxide).
Claim 3
Dependent Claim
16 words
The catheter and base material of claim 1 in which said structural plastic material is polyurethane.
Claim 4
Dependent Claim
15 words
The catheter and base material of claim 2 in which said base material is polyurethane.
Claim 5
Dependent Claim
14 words
The catheter and base material of claim 2 in which said polyurethane is aliphatic.
Claim 6
Dependent Claim
32 words
The catheter of claim 1 claim 1 in which the coating is carried on the outer surface of a plastic catheter, said coating having a thickness of about 0.0001 to 0.05 inch.
Claim 7
Dependent Claim
23 words
The catheter and base material of claim 1 in which the molecular weight of said poly(ethylene oxide) is at least about one million.
Claim 8
Dependent Claim
20 words
The catheter and base material of claim 1 which the coating also contains an effective amount of a therapeutic agent.
Claim 9
Dependent Claim
13 words
The catheter of claim 7 in which said structural plastic material is polyamide.
Claim 10
Dependent Claim
76 words
In a plastic catheter having a friction-reducing coating carried on the outer surface of said catheter, said friction-reducing coating being of the type that provides its maximum friction reduction on hydration thereof, the improvement comprising, in combination: said coating comprising an intimate physical mixture of 50 to 98 weight percent of a plastic material having hydrophobic characteristics, and 2 to 50 weight percent of poly(ethylene oxide) having a molecular weight of at least about one million.
Claim 11
Dependent Claim
76 words
In a plastic catheter having a friction-reducing coating carried on the outer surface of said catheter, said friction-reducing coating being of the type that provides its maximum friction reduction on hydration thereof, the improvement comprising, in combination: said coating comprising an intimate physical mixture of 50 to 98 weight percent of a plastic material having hydrophobic characteristics, and 2 to 50 weight percent of poly(ethylene oxide) having a molecular weight of at least about one million.
Claim 12
Dependent Claim
18 words
The catheter of claim 9 in which the thickness of said coating is about 0.0001 to 0.05 inch.
Claim 13
Dependent Claim
12 words
The catheter of claim 9 in which the plastic material is polyurethane.
Claim 14
Dependent Claim
19 words
The catheter of claim 11 in which the catheter itself which carries said coating is also made of polyurethane.
Claim 15
Dependent Claim
18 words
The catheter of claim 9 in which said coating also contains an effective amount of a therapeutic agent.
Claim 16
Dependent Claim
83 words
In a plastic catheter having a friction-reducing coating carried on the outer surface of said catheter, said friction-reducing coating being of the type that provides friction reduction on hydration thereof, the improvement comprising, in combination: said coating comprising an intimate physical mixture of 50 to 98 weight percent of a plastic material having hydrophobic characteristics, and 2 to 50 weight percent of poly(ethylene exide) having a molecular weight of at least 10,000, the thickness of said coating being about 0.0001 to 0.05 inch.
Claim 17
Dependent Claim
83 words
In a plastic catheter having a friction-reducing coating carried on the outer surface of said catheter, said friction-reducing coating being of the type that provides friction reduction on hydration thereof, the improvement comprising, in combination: said coating comprising an intimate physical mixture of 50 to 98 weight percent of a plastic material having hydrophobic characteristics, and 2 to 50 weight percent of poly(ethylene exide) having a molecular weight of at least 10,000, the thickness of said coating being about 0.0001 to 0.05 inch.
Claim 18
Dependent Claim
19 words
The catheter of claim 14 in which the molecular weight of said poly(ethylene oxide) is at least one million.
Claim 19
Dependent Claim
18 words
The catheter of claim 14 in which said coating also contains an effective amount of a therapeutic agent.
Claim 20
Dependent Claim
12 words
The catheter of claim 14 in which said plastic material is polyamide.
Claim 21
Dependent Claim
13 words
The plastic catheter of claim 14 in which the plastic material is polyurethane.
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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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |