US5496276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter balloon with retraction coating
Assignee: Boston Scientific Scimed Inc
•
Filing: 1995-05-22
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Granted: 1996-03-05
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Expires: 2015-05-22
Abstract
Abstract An inflatable balloon (14) for a catheter (10) includes a coating (15) which causes the balloon to prefer a predetermined, low profile configuration, such as a trifold configuration (40), when deflated. The balloon has a wall (13) which has an exterior polymeric coating (15). The coating (15) is set while the balloon is in the predetermined low-profile deflated configuration so that after inflation, the coating acts to urge the balloon to return to the low profile configuration as the balloon is deflated.
Inventors
- 👤 Lixiao Wang
- 👤 Linda J. Vickerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:36
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0043; A61M25/0045; A61M25/10; A61M25/1002; A61M25/1027; A61M25/1038; A61M25/104; B; B29; B29C; B29C49/00; B29C49/02; B29C49/04; A61M25/1029; A61M2025/1031; A61M2025/1043; A61M2025/1075; A61M2025/1088; B29C2949/00; B29C2949/07; B29C2949/079; B29C2949/08; B29C35/00; B29C35/02; B29C35/04; B29C35/041; B29K; B29K2067/00; B29K2105/00; B29K2105/25; B29K2105/253; B29K2105/258; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
144 words
A method for treating a dilatation balloon to prefer a preshaped, deflated folded configuration so that, after inflation to a dilatation pressure, the balloon reattains the preshaped deflated folded configuration when the balloon is deflated, the balloon being made of a wall material, the method comprising forming the balloon into said preshaped deflated folded configuration, coating the balloon with a formulation comprising a coating polymer before or after said forming step and, while the balloon is in said preshaped deflated folded configuration, setting the coating, the coating material and thickness being selected to provide the balloon with the property that the balloon will return to the preshaped folded configuration upon deflation after inflation to a pressure at least one atmosphere higher than the pressure which the same balloon preshaped in the same configuration, but uncoated, would withstand and return to its preshaped folded configuration.
Claim 2
Independent Claim
144 words
A method for treating a dilatation balloon to prefer a preshaped, deflated folded configuration so that, after inflation to a dilatation pressure, the balloon reattains the preshaped deflated folded configuration when the balloon is deflated, the balloon being made of a wall material, the method comprising forming the balloon into said preshaped deflated folded configuration, coating the balloon with a formulation comprising a coating polymer before or after said forming step and, while the balloon is in said preshaped deflated folded configuration, setting the coating, the coating material and thickness being selected to provide the balloon with the property that the balloon will return to the preshaped folded configuration upon deflation after inflation to a pressure at least one atmosphere higher than the pressure which the same balloon preshaped in the same configuration, but uncoated, would withstand and return to its preshaped folded configuration.
Claim 3
Dependent Claim
46 words
The method of claim 1 wherein the coating formulation is applied as a solution of the coating polymer in a solvent, inert to the balloon wall material, and is set by drying the applied solution while the balloon is maintained in said preshaped folded deflated configuration.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein the coating is applied by dipping the balloon into the coating polymer solution.
Claim 5
Dependent Claim
19 words
The method of claim 2 wherein the coating is applied by spraying the coating polymer solution onto the balloon.
Claim 6
Dependent Claim
31 words
The method of claim 1 wherein the coating formulation is a thermoset formulation and is set by curing the formulation while the balloon is maintained in said preshaped folded deflated configuration.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein the coating polymer is a polymer having greater shape memory than the balloon wall material.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein the coating polymer is a shape memory polymer.
Claim 9
Dependent Claim
12 words
The method of claim 7 wherein the coating polymer is a polyurethane.
Claim 10
Dependent Claim
43 words
The method of claim 1 wherein the coating material and thickness are selected to provide the balloon with the property that the balloon will return to the predetermined low profile configuration upon deflation after inflation to a pressure of at least 9 atm.
Claim 11
Dependent Claim
15 words
A method as in claim 9 wherein said inflation pressure is at least 13 atmospheres.
Claim 12
Dependent Claim
35 words
The method of claim 1 wherein the balloon wall material is selected from the group consisting of polyethylene terephthalate, high density polyethylene, polyamides, polycarbonates and stiff polyurethanes, polyvinyl chloride, polyethylene, polyester copolymers and polyolefin copolymers.
Claim 13
Dependent Claim
13 words
The method of claim 11 wherein the balloon wall material comprises polyethylene terephthalate.
Claim 14
Dependent Claim
24 words
The method of claim 1 wherein the coating is applied to a thickness, double wall basis, within the range of 0.0001 to 0.0015 inches.
Claim 15
Dependent Claim
20 words
The method of claim 13 wherein the coating applied to a double wall coating thickness of 0.0005 to 0.0010 inches.
Claim 16
Dependent Claim
19 words
The method of claim 1 wherein the coating polymer has a glass transition temperature less than 37 degrees Centigrade.
Claim 17
Dependent Claim
36 words
The method of claim 1 wherein the coating material is applied as a curable formulation and is set by curing the formulation on the balloon while the balloon is maintained in said preshaped deflated folded configuration.
Claim 18
Dependent Claim
15 words
The method of claim 1 wherein the preshaped deflated folded configuration is a trifolded configuration.
Claim 19
Dependent Claim
15 words
The method of claim 1 wherein the preshaped deflated folded configuration is an S-folded configuration.
Claim 20
Dependent Claim
27 words
The method of claim 1 wherein the coating polymer is a polymer which displays greater shape memory at body temperature than the material of the balloon wall.
Claim 21
Dependent Claim
12 words
The method of claim 1 wherein the coating polymer is an elastomer.
References Cited (Backward Citations)
US2690595A
Cited
US3617344A
Cited
US3457098A
Cited
US3846353A
Cited
US4254774A
Cited
US4413989A
Cited
US4608984A
Cited
US4338942A
Cited
US4403612A
Cited
US4387833A
Cited
GB2130093A
Cited
US4702252A
Cited
US4637396A
Cited
US4646742A
Cited
US4786556A
Cited
US4793350A
Cited
US4884573A
Cited
US4932956A
Cited
US4950239A
Cited
US4994072A
Cited
US5192296A
Cited
US5087246A
Cited
US4941877A
Cited
US5147302A
Cited
US5015231A
Cited
US5116318A
Cited
US5037392A
Cited
US5026607A
Cited
US5272012A
Cited
EP0420488B1
Cited
US5290306A
Cited
EP0492361A1
Cited
US5195970A
Cited
US5195969A
Cited
EP0553960A1
Cited
US5226887A
Cited
US5350361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-05 | 1999-09-04 | 2000-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-05 | 2003-09-04 | 2004-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-05 | 2007-09-04 | 2008-03-05 | $7700.00 | Window Closed / Lapsed |