US6447835B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating polymeric tubes used in medical devices
Assignee: Boston Scientific Scimed Inc
•
Filing: 2000-02-15
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Granted: 2002-09-10
•
Expires: 2020-02-15
Abstract
Abstract The present invention relates to a method of preparing a coated hollow polymeric tubular member useful in medical devices. The method involves a simple, unique method of simultaneously extruding and coating the polymeric tube.
Inventors
- 👤 Lixiao Wang
- 👤 Yiqun Wang
- 👤 Dachuan Yang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:42
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/25; B29C48/94; A61M25/0043; A61M25/0045; B29C48/03; B29C48/09; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
99 words
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder and comprising forcing a stream of a molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a hydrophilic lubricious coating to said tube at a coating thickness that is about 0.2% to about 20% of the total of the wall thickness of the tube and the thickness of the coating prior to said tube exiting said discharge port.
Claim 2
Independent Claim
99 words
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder and comprising forcing a stream of a molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a hydrophilic lubricious coating to said tube at a coating thickness that is about 0.2% to about 20% of the total of the wall thickness of the tube and the thickness of the coating prior to said tube exiting said discharge port.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said coating is sprayed on said inner surface of said tube immediately prior to said tube exiting said discharge port.
Claim 4
Dependent Claim
28 words
The method of claim 1 wherein said coating is applied to said inner surface of said tube by pumping said coating to a channel in said extruder unit.
Claim 5
Dependent Claim
44 words
The method of claim 1 wherein said coating is applied to said outside surface of said tube by pumping said lubricious coating to a circular channel wherein said lubricious coating is circulated around said tube at a point prior to exiting said extruder unit.
Claim 6
Dependent Claim
15 words
The method of claim 1 wherein said tube is a preform for a dilatation balloon.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said balloon is formed from a non-compliant thermoplastic polymer.
Claim 8
Dependent Claim
36 words
The method of claim 5 wherein said balloon is formed from a thermoplastic polymer selected from the group consisting of polyethelene terephthalate, high density polyethelene, polyamides, polyether block amides, polycarbonates and stiff polyurethanes, and mixtures thereof.
Claim 9
Dependent Claim
14 words
The method of claim 1 wherein said tube is utilized in a catheter assembly.
Claim 10
Dependent Claim
47 words
The method of claim 1 wherein said tube is comprised of at least one member selected from the group consisting of polyesters, polyamides, polyurethanes, polyurethaneureas, polyolefins, polycarbonates, polyvinyl acetate, thermoplastic elastomers, polyvinyl chloride, polystyrene, polyacrylate, polymethacrylate, polyacrylonitrile, polyacrylamide, silicone resins, copolymers and terpolymers thereof, and mixtures thereof.
Claim 11
Dependent Claim
14 words
The method of claim 1 wherein said coating is a liquid at room temperature.
Claim 12
Dependent Claim
14 words
The method of claim 1 wherein said coating is a solid at room temperature.
Claim 13
Dependent Claim
61 words
The method of claim 1 wherein said hydrophilic lubricious coating comprises at least one compound selected from the group consisting of polyalkylene glycols, alkoxy polyalkylene glycols, phosphazenes, poly(2-ethyl-2-oxazoline), copolymers of methylvinyl ether and maleic acid, poly(vinylpyrrolidone), polyvinylsulfonic acid, poly(N-alkylacrylamide), poly(acrylic acid), poly(vinyl alcohol), polyalkylene oxide-modified polydimethylsiloxanes, poly(ethyleneimine), polyamides, methyl cellulose, carboxymethylcellulose, heparin, dextran, modified dextran, hydroxyalkylated chitin, hyaluronan, and mixtures thereof.
Claim 14
Dependent Claim
13 words
The method of claim 1 wherein said hydrophilic lubricious coating comprises a monomer.
Claim 15
Dependent Claim
16 words
The method of claim 13 wherein said monomer is polymerized on said surface of said tube.
Claim 16
Dependent Claim
27 words
The method of claim 14 wherein said polymerization is initialized by a method selected from the group consisting of chemical, thermal, ultraviolet, electron beam, and mixtures thereof.
Claim 17
Dependent Claim
16 words
The method of claim 1 wherein said coating thickness is about 1 to about 10 μm.
Claim 18
Dependent Claim
26 words
The method of claim 1 wherein said hydrophilic lubricious coating has a viscosity of about 100 cPs to about 1000 cPs at the temperature of application.
Claim 19
Dependent Claim
17 words
The method of claim 16 wherein said coating is applied to said tube in a molten state.
Claim 20
Dependent Claim
20 words
The method of claim 1 wherein said coating lowers the coefficient of friction between said tube and a secondary surface.
Claim 21
Independent Claim
103 words
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder comprising forcing a stream of molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a lubricious coating by spraying said lubricious coating on said tube or by pumping said lubricious coating to a channel in said extruder shaping head and circulating said lubricious coating around said tube thereby applying said coating to said tube prior to said tube exiting said discharge port.
Claim 22
Independent Claim
103 words
A method of preparing a flexible polymeric catheter tube having an inner surface and an outer surface useful in medical devices using a single extruder comprising forcing a stream of molten base polymer into an entry port at one end of the extruder shaping die said shaping die also having a discharge port, and applying a lubricious coating by spraying said lubricious coating on said tube or by pumping said lubricious coating to a channel in said extruder shaping head and circulating said lubricious coating around said tube thereby applying said coating to said tube prior to said tube exiting said discharge port.
Claim 23
Dependent Claim
20 words
The method of claim 20 wherein said lubricious coating has a viscosity from about 100 cPs to about 1000 cPs.
Claim 24
Dependent Claim
15 words
The method of claim 20 wherein said lubricious coating is a liquid at room temperature.
Claim 25
Dependent Claim
17 words
The method of claim 1 wherein said coating thickness is about 1 micron to about 10 microns.
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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) | 2005-09-09 | 2006-03-11 | 2006-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-09 | 2010-03-11 | 2010-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-09 | 2014-03-11 | 2014-09-10 | $7700.00 | Window Closed / Lapsed |