US4950239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angioplasty balloons and balloon catheters
Assignee: Worldwide Medical Plastics Inc
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Filing: 1988-08-09
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Granted: 1990-08-21
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Expires: 2008-08-09
Abstract
Abstract Angioplasty and related medical dilatation balloons are molded from a polyurethane in which the "soft" segment is a minor segment by weight and the "hard" segment is the major segment by weight and which polyurethane has a hardness of at least 75D and a glass transition temperature of more than about 38° C. The balloons can be integrally molded on one end of a catheter fabricated from the above type of polyurethane. Alternatively, the balloon is formed from polyurethane of the above type and the catheter is formed from elastomeric polyurethane and like polymers commonly employed in preparation of catheters. The balloon is then bonded to the catheter by conventional procedures.
Inventors
- 👤 William J. Gahara
- 👤 Thomas R. Johnson
- 👤 Tilak M. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:34
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M25/1027; A61M2025/1043; A61M2025/1079; A61M2025/1086; A61M25/1029; A61M25/1034
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
112 words
A medical dilatation balloon molded from a polyurethane which has a hardness of at least about 75D and a glass transition temperature of more than about 38° C. and which comprises the reaction product of (a) an organic diisocyanate; (b) a polyol having an average functionality of at least 1.9 and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyol in said polyurethane is from about 2 to about 25 percent.
Claim 2
Dependent Claim
112 words
A medical dilatation balloon molded from a polyurethane which has a hardness of at least about 75D and a glass transition temperature of more than about 38° C. and which comprises the reaction product of (a) an organic diisocyanate; (b) a polyol having an average functionality of at least 1.9 and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyol in said polyurethane is from about 2 to about 25 percent.
Claim 3
Dependent Claim
35 words
A medical dilatation balloon in accordance with claim 1 wherein the amount of said polyol is within the range of about 4 to about 15 percent by weight based on the weight of said polyurethane.
Claim 4
Dependent Claim
17 words
A medical dilatation balloon in accordance with claim 1 wherein the organic diisocyanate comprises 4,4'-methylenebis (phenyl isocyanate).
Claim 5
Dependent Claim
17 words
A medical dilatation balloon in accordance with claim 1 wherein the chain extender comprises an aliphatic diol.
Claim 6
Dependent Claim
33 words
A medical dilatation balloon in accordance with claim 1 wherein the chain extender is selected from the class consisting of 1,6-hexanediol, 1,4-cyclohexanedimethanol, Bisphenol A and mixtures of two or all of these compounds.
Claim 7
Dependent Claim
20 words
A medical dilatation balloon in accordance with claim 4 wherein the chain extender is a mixture of 1,6-hexanediol and 1,4-cyclohexanedimethanol.
Claim 8
Dependent Claim
144 words
A medical dilatation balloon catheter comprising a catheter and a balloon sealingly bonded on or proximate the distal end of said catheter, characterized in that said balloon is fabricated from a polyurethane which has a hardness of at least about 75D, a glass transition temperature of more than about 38° C. and which comprises the reaction product of (a) an organic diisocyanate; (b) a polyol having an average functionality of at least 1.9 and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyol in said polyurethane is from about 2 to about 25 percent and said catheter is fabricated from an elastomeric polyurethane.
Claim 9
Dependent Claim
144 words
A medical dilatation balloon catheter comprising a catheter and a balloon sealingly bonded on or proximate the distal end of said catheter, characterized in that said balloon is fabricated from a polyurethane which has a hardness of at least about 75D, a glass transition temperature of more than about 38° C. and which comprises the reaction product of (a) an organic diisocyanate; (b) a polyol having an average functionality of at least 1.9 and a molecular weight in the range of about 500 to about 20,000; and (c) at least one chain extender having a functionality from 2 to 3 and a molecular weight from about 50 to about 400; said polyurethane being further characterized in that the proportion by weight of said polyol in said polyurethane is from about 2 to about 25 percent and said catheter is fabricated from an elastomeric polyurethane.
Claim 10
Dependent Claim
36 words
A medical dilatation balloon catheter in accordance with claim 7 wherein the amount of said polyol is within the range of about 4 to about 15 percent by weight based on the weight of said polyurethane.
Claim 11
Dependent Claim
18 words
A medical dilatation balloon catheter in accordance with claim 7 wherein the organic diisocyanate comprises 4,4'-methylenebis (phenyl isocyanate).
Claim 12
Dependent Claim
18 words
A medical dilatation balloon catheter in accordance with claim 7 wherein the chain extender comprises an aliphatic diol.
Claim 13
Dependent Claim
21 words
A medical dilatation balloon catheter in accordance with claim 10 wherein the chain extender is a mixture of 1,6-hexanediol and 1,4-cyclohexanedimethanol.
Claim 14
Dependent Claim
34 words
A medical dilatation balloon catheter in accordance with claim 7 wherein the chain extender is selected from the class consisting of 1,6-hexanediol, 1,4-cyclohexanedimethanol, Bisphenol A and mixtures of two or all of these compounds.
Claim 15
Dependent Claim
22 words
A medical dilatation balloon catheter in accordance with claim 7 which also comprises a flexible guide wire suitably mounted within said catheter.
Claim 16
Dependent Claim
16 words
A medical dilatation balloon in accordance with claim 1 wherein the organic diisocyanate comprises 4,4'-methylenebis (cyclohexylisocyanate).
Claim 17
Dependent Claim
17 words
A medical dilatation balloon catheter in accordance with claim 7 wherein the organic diisocyanate comprises 4,4'-methylenebis (cyclohexylisocyanate).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |