Patent US4898591A successfully refreshed from Google Patents.
US4898591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nylon-PEBA copolymer catheter
Assignee: Mallinckrodt Inc
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Filing: 1988-08-09
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Granted: 1990-02-06
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Expires: 2008-08-09
Abstract
Abstract Inner and outer layers of a braided body portion of an intravascular catheter as well as a soft tip portion are formed from different proportioned blends of nylon and copolymer of ester linked polyethylene and polyamide to produce optimum mechanical properties in the catheter. One or more surfaces of the catheter are coated with a hydrogel containing a copolymer of polyurethane and polyvinylpyrrolidone to provide improved lubricity and antithrombogenicity.
Inventors
- 👤 Yue-Teh Jang
- 👤 Vern L. Liebmann
- 👤 Glenda S. Villman
- 👤 Surendra A. Amin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:23
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/08; A61L29/085; A61L29/04; A61L29/049; A61L29/14; A61L29/145; A61M; A61M25/00; A61M25/0043; A61M25/005
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
73 words
An intravascular catheter comprising a tubular body formed with inner and outer polymer layers with a reinforcing braid layer formed between the inner and outer layers, and a soft flexible tubular tip formed from a polymer and having one end bonded to an end of the tubular body, said polymers of said inner and outer layers and said tip including a blend of nylon and a copolymer of ester linked polyethylene and polyamide.
Claim 2
Dependent Claim
73 words
An intravascular catheter comprising a tubular body formed with inner and outer polymer layers with a reinforcing braid layer formed between the inner and outer layers, and a soft flexible tubular tip formed from a polymer and having one end bonded to an end of the tubular body, said polymers of said inner and outer layers and said tip including a blend of nylon and a copolymer of ester linked polyethylene and polyamide.
Claim 3
Dependent Claim
25 words
A catheter as claimed in claim 1 wherein the nylon is nylon-11 and the ester linked copolymer of polyethylene and polyamide is polyether block amide.
Claim 4
Dependent Claim
42 words
A catheter as claimed in claim 2 wherein the polyether block amide has a Shore hardness in the range from 25D to 70D, and the blend includes from 10 to 90% by weight of the copolymer of ester linked polyethylene and polyamide.
Claim 5
Dependent Claim
79 words
A catheter as claimed in claim 3 wherein the blend in the polymer of the inner and outer layers includes from 30% to 90% by weight of a copolymer of ester linked polyethylene and polyamide having a Shore hardness in the range from 40D to 65D, and the polymer of the tip includes from 50% to 90% by weight of a copolymer of ester linked polyethylene and polyamide having a Shore hardness in the range from 25D to 55D.
Claim 6
Dependent Claim
22 words
A catheter as claimed in claim 1 further including a coating of lubricous hydrogel on at least one surface of the catheter.
Claim 7
Dependent Claim
29 words
A catheter as claimed in claim 1 wherein the catheter is a guiding catheter, and the coating of lubricous hydrogel is formed on the interior surface of the catheter.
Claim 8
Dependent Claim
19 words
A catheter as claimed in claim 6 wherein the lubricous hydrogel material is a copolymer of polyurethane and polyvinylpyrrolidone.
Claim 9
Dependent Claim
28 words
A catheter as claimed in claim 7 wherein the copolymer of polyurethane and polyvinylpyrrolidone includes from 2 to 3 parts by weight polyvinylpyrrolidone to each part of polyurethane.
Claim 10
Dependent Claim
27 words
A catheter as claimed in claim 1 wherein at least one of the polymers of the inner and outer layers and the tip includes a radiopaque material.
Claim 11
Dependent Claim
27 words
A catheter as claimed in claim 9 wherein the radiopaqaue material is selected from the group consisting of bismuth subcarbonate, barium sulfate, bismuth trioxide and bismuth oxychloride.
Claim 12
Dependent Claim
22 words
A catheter as claimed in claim 9 wherein the polymer of the tip includes from 5% to 50% by weight radiopaque material.
Claim 13
Dependent Claim
31 words
A catheter as claimed in claim 9 wherein the polymer of one of the inner and outer layers of the tubular body includes from 5% to 50% by weight radiopaque material.
Claim 14
Dependent Claim
23 words
A catheter as claimed in claim 1 wherein the bonded ends of the tubular body and the tubular tip have mating tapered edges.
Claim 15
Dependent Claim
69 words
An intravascular catheter comprising a tubular body formed from a polymer, a soft flexible tubular tip formed from a polymer and having one end bonded to an end of the tubular body, said polymers of said tubular body and said tip including a blend of nylon and a copolymer of ester linked polyethylene and polyamide, and a coating of lubricous hydrogel on at least one surface of the catheter.
Claim 16
Dependent Claim
69 words
An intravascular catheter comprising a tubular body formed from a polymer, a soft flexible tubular tip formed from a polymer and having one end bonded to an end of the tubular body, said polymers of said tubular body and said tip including a blend of nylon and a copolymer of ester linked polyethylene and polyamide, and a coating of lubricous hydrogel on at least one surface of the catheter.
Claim 17
Dependent Claim
29 words
A catheter as claimed in claim 14 wherein the catheter is a guiding catheter, and the coating of lubricous hydrogel is formed on the interior surface of the catheter.
Claim 18
Dependent Claim
19 words
A catheter as claimed in claim 14 wherein the lubricous hydrogel material is a copolymer of polyurethane and polyvinylpyrrolidone.
Claim 19
Dependent Claim
28 words
A catheter as claimed in claim 16 wherein the copolymer of polyurethane and polyvinylpyrrolidone includes from 2 to 3 parts by weight polyvinylpyrrolidone to each part of polyurethane.
Claim 20
Dependent Claim
66 words
An intravascular catheter comprising a tubular body comprising inner and outer polymer layers with a reinforcing braid layer between the inner and outer layers, and a soft flexible tubular tip formed from a polymer and having one end attached to an end of the tubular body, said polymer of said inner and outer layers and said tip comprising a copolymer of ester linked polyethylene an polyamide.
Claim 21
Dependent Claim
66 words
An intravascular catheter comprising a tubular body comprising inner and outer polymer layers with a reinforcing braid layer between the inner and outer layers, and a soft flexible tubular tip formed from a polymer and having one end attached to an end of the tubular body, said polymer of said inner and outer layers and said tip comprising a copolymer of ester linked polyethylene an polyamide.
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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) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |