Patent US4952357A successfully refreshed from Google Patents.
US4952357A
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Method of making a polyimide balloon catheter
Assignee: Boston Scientific Scimed Inc
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Filing: 1988-08-08
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Granted: 1990-08-28
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Expires: 2008-08-08
Abstract
Abstract A method for forming a balloon for use in a balloon catheter by depositing a film over the exterior surface of a substrate. The film includes a plurality of layers in which one of the layers is a polyimide and another is made of a metallic material which heats in response to the application of electromagnetic energy. The substrate is removed to leave a balloon in the desired shape.
Inventors
- 👤 Charles L. Euteneuer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:12
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1029; A61M25/1038; B; B29; B29C; B29C33/00; B29C33/44; B29C33/52; B29C41/00; B29C41/02; B29C41/22; A61M2025/1043; A61M2025/1075; B29K; B29K2079/00; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
107 words
A method of forming a balloon for use in a balloon catheter, the method comprising the steps of: providing a substrate having an exterior surface configuration which corresponds to a desired shape of the balloon in a predetermined condition; depositing a film over the exterior surface of the substrate wherein the film is defined by a plurality of layers of substrate coatings, with at least one layer formed from a polyimide polymer material and another layer formed from a metallic material which heats in response to an application of electro-magnetic energy thereto; and removing the substrate within the film to leave a balloon of the desired shape.
Claim 2
Independent Claim
107 words
A method of forming a balloon for use in a balloon catheter, the method comprising the steps of: providing a substrate having an exterior surface configuration which corresponds to a desired shape of the balloon in a predetermined condition; depositing a film over the exterior surface of the substrate wherein the film is defined by a plurality of layers of substrate coatings, with at least one layer formed from a polyimide polymer material and another layer formed from a metallic material which heats in response to an application of electro-magnetic energy thereto; and removing the substrate within the film to leave a balloon of the desired shape.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein removing the substrate comprises: chemically dissolving the substrate.
Claim 4
Dependent Claim
12 words
The method of claim 2 wherein the substrate in a glass material.
Claim 5
Dependent Claim
14 words
The method of claim 3 wherein the substrate has a central passage extending therethrough.
Claim 6
Dependent Claim
25 words
The method of claim 1 wherein the substrate has a lower melting temperature than the film, and wherein removing the substrate comprises melting the substrate.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein the plurality of layers have a combined thickness of less than about 0.001 inches.
Claim 8
Dependent Claim
15 words
The method of claim 1 wherein the film includes an outer layer of anti-friction material.
Claim 9
Dependent Claim
25 words
The method of claim 1 wherein the substrate has a proximal waist section, an intermediate section of greater outside diameter, and a distal tip section.
Claim 10
Dependent Claim
27 words
The method of claim 8 wherein the intermediate section has an outer surface configuration which corresponds to a desired shape of the balloon in an inflated condition.
Claim 11
Dependent Claim
27 words
The method of claim 8 wherein the intermediate section has an outer surface configuration which corresponds to a desired shape in the balloon in a deflated condition.
Claim 12
Dependent Claim
18 words
The method of claim 1 and further comprising: curing the polyimide polymer material prior to removing the substrate.
Claim 13
Dependent Claim
22 words
The method of claim 11, and further comprising: performing a mechanical forming process on the film after depositing and prior to curing.
Claim 14
Dependent Claim
13 words
The method of claim 7 wherein the anti-friction material is a Paralene polymer.
Claim 15
Dependent Claim
15 words
The method of claim 1 wherein each layer has a thickness of about 0.0001 inches.
References Cited (Backward Citations)
US2690595A
Cited
GB773971A
Cited
FR1324241A
Cited
US3304353A
Cited
US4497074A
Cited
US4413989A
Cited
US4490421A
Cited
US4737219A
Cited
US4786556A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |