Patent US6273878B1 successfully refreshed from Google Patents.
US5306246A
Expired / Lapsed
US
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Balloon for medical catheter
Assignee: Boston Scientific Scimed Inc
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Filing: 1992-09-11
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Granted: 1994-04-26
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Expires: 2012-09-11
Abstract
Abstract An inflatable medical dilation balloon and methods for forming the same wherein the balloon member is comprised of a polymer bled including a predominant amount of a crystalline polymer, e.g. a polyester, and a compliance enhancing additive polymer, e.g. a polyolefin, in amount sufficient to interrupt the crystalline structure of the crystalline polymer. The amount is about 20% or less of the polymer blend. The balloon member formed of the polymer blend is inflatable for medical dilation, e.g. of the prostrate.
Inventors
- 👤 Ronald Sahatjian
- 👤 Arthur R. Madenjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61L; A61L29/00; A61L29/04; A61L29/049; A61M25/1029; C; C08; C08L; C08L67/00; C08L67/02; C08L23/00; C08L23/02; C08L23/04; C08L23/06; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
71 words
A medical device comprising a support member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: a balloon member comprised of a polymer blend including a predominant amount of a crystalline polymer and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend.
Claim 2
Dependent Claim
71 words
A medical device comprising a support member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: a balloon member comprised of a polymer blend including a predominant amount of a crystalline polymer and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein said additive is an amorphous polymer.
Claim 4
Dependent Claim
11 words
The device of claim 2 wherein said additive is a polyolefin.
Claim 5
Dependent Claim
10 words
The device of claim 3 wherein said additive is polyethylene.
Claim 6
Dependent Claim
11 words
The device of claim 1 wherein said additive is a preblend.
Claim 7
Dependent Claim
15 words
The device of claim 5 wherein said additive is a preblend of PET and polyolefin.
Claim 8
Dependent Claim
20 words
The balloon of claim 1 or 6 wherein said additive is between about 5 to 10% of said polymer blend.
Claim 9
Dependent Claim
15 words
The device of claim 5 wherein said additive is a preblend of PET and polyethylene.
Claim 10
Dependent Claim
14 words
The device of claim 1 wherein said additive is immiscible with said crystalline polymer.
Claim 11
Dependent Claim
13 words
The device of claim 9 wherein said additive forms domains within said blend.
Claim 12
Dependent Claim
12 words
The device of claim 1 wherein said additive is a crystalline polymer.
Claim 13
Dependent Claim
13 words
The device of claim 11 wherein said additive is a liquid-crystal polyester material.
Claim 14
Dependent Claim
14 words
The balloon of claim 1 wherein said crystalline polymer is high molecular weight PET.
Claim 15
Dependent Claim
17 words
The balloon of claim 13 wherein said PET has an intrinsic viscosity of about 0.7 or greater.
Claim 16
Dependent Claim
18 words
The balloon of claim 1 wherein said balloon wall has a thickness of about 0.0015 inch or less.
Claim 17
Dependent Claim
17 words
The balloon of claim 15 wherein said balloon has a burst pressure of more than 6 atmosphere.
Claim 18
Dependent Claim
17 words
The balloon of claim 15 wherein said balloon has a burst pressure of 4 to 8 atmosphere.
Claim 19
Dependent Claim
14 words
The device of claim 1 wherein said additive is miscible with said crystalline polymer.
Claim 20
Dependent Claim
15 words
The balloon of claim 1 wherein said balloon is sized for dilatation of the prostate.
Claim 21
Dependent Claim
20 words
The balloon of claim 1 wherein said balloon has a hoop stress at failure of greater than about 36,000 psi.
Claim 22
Dependent Claim
27 words
The balloon of claim 1 wherein said balloon exhibits enhanced compliance over PET of about 25% or more with decreased hoop stress of about 10% or less.
Claim 23
Dependent Claim
25 words
The balloon of claim 1 wherein said balloon of said polymer blend is formed by free inflation under conditions to biaxially orient said crystalline polymer.
Claim 24
Dependent Claim
79 words
In a method for forming a medical device comprising a supporting member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: preparing a polymer blend of a predominant amount of a crystalline polymer with a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend, and forming said blend into a balloon.
Claim 25
Dependent Claim
79 words
In a method for forming a medical device comprising a supporting member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: preparing a polymer blend of a predominant amount of a crystalline polymer with a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend, and forming said blend into a balloon.
Claim 26
Dependent Claim
22 words
The method of claim 23 wherein said preparing comprises blending a crystallizable polymer with said additive, and then crystallizing said crystallizable polymer.
Claim 27
Dependent Claim
29 words
The method of claim 23 or 24 wherein said forming comprises forming said balloon of said polymer blend by free inflation under conditions to biaxially orient said crystalline polymer.
Claim 28
Dependent Claim
20 words
The method of claim 25 further comprising blending said crystalline polymer with an additive in the form of a preblend.
Claim 29
Dependent Claim
15 words
The method of claim 26 wherein said preblend is a preblend of PET and polyolefin.
Claim 30
Dependent Claim
68 words
A medical device comprising a supporting member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: a balloon member comprised of a polymer blend including a predominant amount of PET, and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said PET, said amount being about 20% or less of the polymer blend.
Claim 31
Dependent Claim
68 words
A medical device comprising a supporting member, an inflation lumen and a medical balloon mounted on said support and communicating with said lumen, the improvement comprising: a balloon member comprised of a polymer blend including a predominant amount of PET, and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said PET, said amount being about 20% or less of the polymer blend.
Claim 32
Dependent Claim
15 words
The device of claim 28 wherein said additive is a preblend of PET and polyolefin.
Claim 33
Dependent Claim
63 words
A dilation catheter, comprising: a catheter shaft carrying at its distal end a dilation balloon which can be inflated, said balloon comprised of a polymer blend including a predominant amount of a crystalline polymer and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend.
Claim 34
Dependent Claim
63 words
A dilation catheter, comprising: a catheter shaft carrying at its distal end a dilation balloon which can be inflated, said balloon comprised of a polymer blend including a predominant amount of a crystalline polymer and a compliance enhancing additive polymer in amount sufficient to interrupt the crystalline structure of said crystalline polymer, said amount being about 20% or less of the polymer blend.
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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) | 1997-04-25 | 1997-10-25 | 1998-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-25 | 2001-10-25 | 2002-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-25 | 2005-10-25 | 2006-04-26 | $7700.00 | Window Closed / Lapsed |