US5538510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter having coextruded tubing
Assignee: Cordis US Corp
•
Filing: 1994-01-31
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Granted: 1996-07-23
•
Expires: 2014-01-31
Abstract
Abstract An intravascular catheter comprises a length of flexible plastic tubing which, in turn, comprises an outer plastic layer and an inner plastic layer. The plastic materials of the outer and inner layers are different, and may be chemically bonded to each other. Advantages in catheter design are achieved.
Inventors
- 👤 Carlos A. Fontirroche
- 👤 Stephen J. Querns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:51
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/0009; A61M25/0043; A61M25/0045; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; B29C48/10; B29C48/12; B29C48/16; B29C48/18; B29C48/21; A61M2025/0046; A61M2025/0047; A61M2025/0048; A61M25/1034; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T29/49938; Y10T29/4994
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
111 words
An intravascular catheter which comprises a coextruded length of flexible plastic extending most of the length of said catheter tubing, said tubing comprising an outer plastic layer and an inner plastic layer, said inner plastic layer comprising a high density polyethylene having functional groups chemically bonded to the material of the outer plastic layer, the plastic materials of said outer and inner plastic layers being different, the material of the inner plastic layer defining a catheter lumen, the walls of which exhibit lower frictional characteristics than the material of said outer plastic layer, the material of the outer plastic layer having greater stiffness than the material of the inner plastic layer.
Claim 2
Dependent Claim
111 words
An intravascular catheter which comprises a coextruded length of flexible plastic extending most of the length of said catheter tubing, said tubing comprising an outer plastic layer and an inner plastic layer, said inner plastic layer comprising a high density polyethylene having functional groups chemically bonded to the material of the outer plastic layer, the plastic materials of said outer and inner plastic layers being different, the material of the inner plastic layer defining a catheter lumen, the walls of which exhibit lower frictional characteristics than the material of said outer plastic layer, the material of the outer plastic layer having greater stiffness than the material of the inner plastic layer.
Claim 3
Dependent Claim
25 words
The catheter of claim 1 in which the material of said outer plastic layer is selected from the group consisting of nylon, polyurethane, and polyester.
Claim 4
Dependent Claim
25 words
The catheter of claim 2 in which said inner plastic layer comprises from 30 to 50 percent of the thickness of said flexible plastic tubing.
Claim 5
Dependent Claim
38 words
The catheter of claim 3 in which said length of flexible plastic tubing and outer plastic layer comprise a length of multiple lumen tubing, said inner plastic layer comprising a tubular member extending through one of said lumens.
Claim 6
Dependent Claim
33 words
The catheter of claim 1 in which said high density polyethylene is a copolymer of a major amount of ethylene and a minor amount of an unsaturated carboxylic acid or an anhydride thereof.
Claim 7
Dependent Claim
18 words
The catheter of claim 5 in which the material of said outer plastic layer consists essentially of nylon.
Claim 8
Dependent Claim
38 words
The catheter of claim 1 in which said length of flexible plastic tubing and outer plastic layer comprise a length of multiple lumen tubing, said inner plastic layer comprising a tubular member extending through one of said lumens.
Claim 9
Dependent Claim
82 words
An intravascular catheter which comprises a length of flexible plastic tubing having a first lumen and extending most of the length of said catheter, said tubing comprising an outer plastic layer and an inner plastic layer, said inner plastic layer comprising a copolymer of a major amount of high density polyethylene and a minor amount of an unsaturated carboxylic acid or an anhydride thereof, the plastic materials of said outer and inner plastic layers being different, and chemically bonded to each other.
Claim 10
Dependent Claim
82 words
An intravascular catheter which comprises a length of flexible plastic tubing having a first lumen and extending most of the length of said catheter, said tubing comprising an outer plastic layer and an inner plastic layer, said inner plastic layer comprising a copolymer of a major amount of high density polyethylene and a minor amount of an unsaturated carboxylic acid or an anhydride thereof, the plastic materials of said outer and inner plastic layers being different, and chemically bonded to each other.
Claim 11
Dependent Claim
34 words
The catheter of claim 8 in which the material of the inner plastic layer defines a catheter lumen, the walls of which exhibit lower frictional characteristics than the material of said outer plastic layer.
Claim 12
Dependent Claim
25 words
The catheter of claim 8 in which the material of the outer plastic layer has greater stiffness than the material of the inner plastic layer.
Claim 13
Dependent Claim
25 words
The catheter of claim 8 in which from 1 to 5 mole percent of maleic anhydride polymer units are present in said high density polyethylene.
Claim 14
Dependent Claim
16 words
The catheter of claim 8 in which the material of said outer plastic layer comprises nylon.
Claim 15
Dependent Claim
28 words
The catheter of claim 8 in which said inner plastic layer has a thickness of 5 to 50 percent of the total wall thickness of said plastic tubing.
Claim 16
Dependent Claim
35 words
The catheter of claim 8 in which said length of flexible plastic tubing is surrounded by an outer length of flexible plastic tubing with a generally cylindrical space between said lengths of flexible plastic tubing.
Claim 17
Dependent Claim
21 words
The catheter of claim 8 in which said outer plastic layer defines a second lumen spaced from said inner plastic layer.
Claim 18
Dependent Claim
38 words
The catheter of claim 8 in which said length of flexible plastic tubing and outer plastic layer comprise a length of multiple lumen tubing, said inner plastic layer comprising a tubular member extending through one of said lumens.
Claim 19
Dependent Claim
102 words
An intravascular catheter which comprises a length of flexible plastic tubing having a plurality of lumens extending through the length of said plastic tubing, one of said lumens defining a lumen wall which carries an inner plastic layer chemically bonded to said lumen wall, the material of said inner plastic layer comprising a high density polyethylene in which from one to five mole percent of maleic anhydride polymer units are present, said inner plastic layer being chemically bonded to the material defining said one lumen wall, the plastic material of said tubing being different from the material of said inner plastic layer.
Claim 20
Dependent Claim
102 words
An intravascular catheter which comprises a length of flexible plastic tubing having a plurality of lumens extending through the length of said plastic tubing, one of said lumens defining a lumen wall which carries an inner plastic layer chemically bonded to said lumen wall, the material of said inner plastic layer comprising a high density polyethylene in which from one to five mole percent of maleic anhydride polymer units are present, said inner plastic layer being chemically bonded to the material defining said one lumen wall, the plastic material of said tubing being different from the material of said inner plastic layer.
Claim 21
Dependent Claim
21 words
The catheter of claim 17 in which the material of said tubing having a plurality of lumens consists essentially of nylon.
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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) | 1999-07-23 | 2000-01-22 | 2000-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-23 | 2004-01-22 | 2004-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-23 | 2008-01-22 | 2008-07-23 | $7700.00 | Window Closed / Lapsed |