Patent US5102401A successfully refreshed from Google Patents.
US5102401A
Expired / Lapsed
US
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Expandable catheter having hydrophobic surface
Assignee: Superior Healthcare Group Inc
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Filing: 1990-08-22
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Granted: 1992-04-07
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Expires: 2010-08-22
Abstract
Abstract A catheter of a thermoplastic elastomeric hydrophilic polyurethane is coated on at least the outside surface with a hydrophobic polymer and expands to a larger lumen size in about 3 to 15 minutes when contacted with an aqueous liquid. The hydrophilic polyurethane may be synthesized by one-shot bulk polymerization, and may be melt extruded into a base tubing and dip coated with the hydrophobic polymer, or the hydrophilic polyurethane and hydrophobic polymer may be coextruded. The catheter may have multiple lumens and may include an antithrombogenic agent, antiinfective agent and radiopaque agent.
Inventors
- 👤 James M. Lambert
- 👤 Donald D. Solomon
- 👤 Delmer R. Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:36
CPC Classifications
A; A61; A61L; A61L29/00; A61M; A61M25/00; A61M25/0043; A61L29/08; A61L29/085; A61L29/14; A61L29/16; A61L29/18; A61L33/00; A61L33/0005; A61L33/0011; A61L2300/00; A61L2300/40; A61L2300/404; A61L2300/42; A61M25/0021; A61M25/0023; A61M2025/0024
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
50 words
An expandable catheter consisting essentially of a substantially hydrophilic thermoplastic elastomeric polyurethane tubing, said polyurethane comprising the reaction product of a diisocyanate, polyethyleneoxide glycol and a chain extender, and a coating of a hydrophobic polymer on a surface thereof, said tubing expanding when brought into contact with an aqueous liquid.
Claim 2
Dependent Claim
50 words
An expandable catheter consisting essentially of a substantially hydrophilic thermoplastic elastomeric polyurethane tubing, said polyurethane comprising the reaction product of a diisocyanate, polyethyleneoxide glycol and a chain extender, and a coating of a hydrophobic polymer on a surface thereof, said tubing expanding when brought into contact with an aqueous liquid.
Claim 3
Dependent Claim
8 words
The catheter of claim 1 having multiple lumens.
Claim 4
Dependent Claim
117 words
An expandable catheter consisting essentially of: a) a substantially hydrophilic thermoplastic elastomeric polyurethane base tubing, said polyurethane having a hard segment of 30 to 60% and consisting essentially of the reaction product of a diisocyanate, a polyglycol component comprising about 50 to 100% polyethyleneoxide glycol and 0-50% of another polyglycol and a chain extender; b) a coating of a hydrophobic polyurethane on a surface of said tubing; and c) a stripe containing a radiopaque material in at least one of said base tubing and coating, said catheter, when brought into contact with an aqueous liquid, absorbing about 50 to 150% of its weight of said liquid and expanding whereby its inside diameter increases about 15 to 40%.
Claim 5
Dependent Claim
117 words
An expandable catheter consisting essentially of: a) a substantially hydrophilic thermoplastic elastomeric polyurethane base tubing, said polyurethane having a hard segment of 30 to 60% and consisting essentially of the reaction product of a diisocyanate, a polyglycol component comprising about 50 to 100% polyethyleneoxide glycol and 0-50% of another polyglycol and a chain extender; b) a coating of a hydrophobic polyurethane on a surface of said tubing; and c) a stripe containing a radiopaque material in at least one of said base tubing and coating, said catheter, when brought into contact with an aqueous liquid, absorbing about 50 to 150% of its weight of said liquid and expanding whereby its inside diameter increases about 15 to 40%.
Claim 6
Dependent Claim
24 words
The catheter of claim 3 wherein said diisocyanate is selected from the group consisting of 4,4'-diphenylmethane diisocyanate, 3,3'-diphenylmethane diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate.
Claim 7
Dependent Claim
35 words
The catheter of claim 3 wherein said chain extender is selected from the group consisting of 1-4-butanediol, ethylene glycol, diethylene glycol, triethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,6-hexanediol, 1,4-bis-hydroxymethyl cyclohexane, hydroquinone dihydroxyethyl ether, ethanolamine, ethylenediamine and hexamethylenediamine.
Claim 8
Dependent Claim
18 words
The catheter of claim 3 wherein said polyethyleneoxide glycol has a molecular weight of about 650 to 16,000.
Claim 9
Dependent Claim
13 words
The catheter of claim 3 wherein said radiopaque agent is an inorganic radiopaque.
Claim 10
Dependent Claim
27 words
The catheter of claim 3 wherein aid hydrophobic polyurethane has a hard segment content of at least 50% and a water absorption of no more than 10%.
Claim 11
Dependent Claim
8 words
The catheter of claim 3 having multiple lumens.
Claim 12
Dependent Claim
139 words
An expandable catheter consisting essentially of: a) a substantially hydrophilic thermoplastic elastomeric base polyurethane tubing having a hard segment of 40 to 55% and comprising the reaction product of 4,4'-diphenylmethane diisocyanate, 1-4-butanediol, and polyethyleneoxide having a molecular weight of 6,000 to 12,000; b) a coating of a hydrophobic polyurethane on a surface of said base tubing, said hydrophobic polyurethane comprising the reaction product of 4,4'-diphenylmethane diisocyanate, butanediol and polytetramethylene ether glycol; c) a stripe containing a radiopaque material encapsulated by one of said base tubing and said coating; said catheter, when brought into contact with an aqueous liquid, absorbing said liquid and expanding whereby its inside diameter increases about 25%; and d) an agent selected from the group consisting of an antiinfective agent and an antithrombogenic agent associated with at least one of said base tubing and said coating.
Claim 13
Dependent Claim
139 words
An expandable catheter consisting essentially of: a) a substantially hydrophilic thermoplastic elastomeric base polyurethane tubing having a hard segment of 40 to 55% and comprising the reaction product of 4,4'-diphenylmethane diisocyanate, 1-4-butanediol, and polyethyleneoxide having a molecular weight of 6,000 to 12,000; b) a coating of a hydrophobic polyurethane on a surface of said base tubing, said hydrophobic polyurethane comprising the reaction product of 4,4'-diphenylmethane diisocyanate, butanediol and polytetramethylene ether glycol; c) a stripe containing a radiopaque material encapsulated by one of said base tubing and said coating; said catheter, when brought into contact with an aqueous liquid, absorbing said liquid and expanding whereby its inside diameter increases about 25%; and d) an agent selected from the group consisting of an antiinfective agent and an antithrombogenic agent associated with at least one of said base tubing and said coating.
Claim 14
Dependent Claim
18 words
The catheter of claim 10 wherein said hydrophobic polymer has a hard segment content of 50 to 90%.
Claim 15
Dependent Claim
18 words
The catheter of claim 10 wherein said hydrophobic polymer has a water absorption of no more than 10%.
Claim 16
Dependent Claim
8 words
The catheter of claim 10 having multiple lumens.
Claim 17
Dependent Claim
23 words
The catheter of claim 10 wherein said agent is bulk distributed in at least one of said base polyurethane and said hydrophobic polyurethane.
Claim 18
Dependent Claim
22 words
The catheter of claim 10 wherein said agent is coated on at least one of said base polyurethane and said hydrophobic polyurethane.
Claim 19
Dependent Claim
26 words
The catheter of claim 10 wherein said antithrombogenic agent is selected from the group consisting of a prostaglandin, urokinase, streptokinase, tissue plasminogen activator and a heparinoid.
Claim 20
Dependent Claim
22 words
The catheter of claim 10 wherein said antiinfective agent is selected from the group consisting of chlorhexidine, silver sulfadiazine and an antibiotic.
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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) | 1995-04-07 | 1995-10-07 | 1996-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-07 | 1999-10-07 | 2000-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-07 | 2003-10-07 | 2004-04-07 | $7700.00 | Window Closed / Lapsed |