US5330428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dilatation catheter having a random copolymer balloon
Assignee: Boston Scientific Scimed Inc
•
Filing: 1991-05-14
•
Granted: 1994-07-19
•
Expires: 2011-05-14
Abstract
Abstract The present invention provides a dilatation catheter which includes a balloon having at least one layer of a thermoplastic material consisting essentially of a random copolymer made from dimethyl terephthalate dimethyl isophthalate and ethylene glycol. These balloons are particular suited for use on dilatation catheters used for percutaneous transluminal coronary angioplasty.
Inventors
- 👤 Lixiao Wang
- 👤 Bruce H. Rau
- 👤 David Sogard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:33
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1027; A61M25/1029
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
32 words
A dilation catheter comprising: a compliant balloon having at least one layer of a thermoplastic material comprising a random copolymer consisting essentially of random repeating units of ethylene terephthalate and ethylene isophthalate.
Claim 2
Dependent Claim
32 words
A dilation catheter comprising: a compliant balloon having at least one layer of a thermoplastic material comprising a random copolymer consisting essentially of random repeating units of ethylene terephthalate and ethylene isophthalate.
Claim 3
Dependent Claim
26 words
A dilation catheter of claim 1 wherein said random copolymer has a ratio of ethylene terephthalate units to ethylene isophthalate units of between 99:1 to 80:20.
Claim 4
Dependent Claim
26 words
A dilatation catheter of claim 1 wherein said random copolymer has a ratio of ethylene terephthalate units to ethylene isophthalate units of between 95:5 to 90:10.
Claim 5
Dependent Claim
23 words
A dilatation catheter of claim 1 wherein said random copolymer has a ratio of ethylene terephthalate units to ethylene isophthalate units of 92:8.
Claim 6
Dependent Claim
28 words
A dilation catheter of claim 1 wherein said balloon has a radial expansion at 37° of greater than 3% at 200 psi and greater than 7% at burst.
Claim 7
Dependent Claim
28 words
A dilatation catheter of claim 1 wherein said balloon has a radial expansion at 37° of greater than 5% at 200 psi and greater than 10% at burst.
Claim 8
Dependent Claim
18 words
A dilation catheter of claim 1 wherein said balloon has a tensile strength of less than 40,000 psi.
Claim 9
Dependent Claim
19 words
A dilation catheter of claim 1 wherein said random copolymer has an intrinsic viscosity of less than 0.8 dl/g.
Claim 10
Dependent Claim
16 words
A dilation catheter of claim 1 wherein said balloon has a wall thickness between 0.0076-0.051 mm.
Claim 11
Dependent Claim
52 words
A dilatation catheter balloon comprising: at least one layer of a random copolymer of ethylene terephthalate and ethylene isophthalate having a wall thickness of between 0.0076-0.051 mm, a tensile strength less than 40,000 psi, an intrinsic viscosity less than 0.8 dl/g and a radial expansion of greater than 3% at 200 psi.
Claim 12
Dependent Claim
52 words
A dilatation catheter balloon comprising: at least one layer of a random copolymer of ethylene terephthalate and ethylene isophthalate having a wall thickness of between 0.0076-0.051 mm, a tensile strength less than 40,000 psi, an intrinsic viscosity less than 0.8 dl/g and a radial expansion of greater than 3% at 200 psi.
Claim 13
Dependent Claim
17 words
A dilatation catheter balloon of claim 10 wherein said random copolymer layer is compliant at 37° C.
Claim 14
Dependent Claim
34 words
A dilatation catheter balloon of claim 10 wherein said random copolymer layer is more amorphous and less crystalline than a biaxially oriented polyethylene terephthalate homopolymer balloon having a tensile strength greater than 31,000 psi.
Claim 15
Dependent Claim
27 words
A dilation catheter balloon having at least one layer of a thermoplastic material comprising a random copolymer having random repeating units of ethylene terephthalate and ethylene isophthalate.
Claim 16
Dependent Claim
27 words
A dilation catheter balloon having at least one layer of a thermoplastic material comprising a random copolymer having random repeating units of ethylene terephthalate and ethylene isophthalate.
Claim 17
Dependent Claim
20 words
A dilation catheter balloon of claim 13 wherein the random copolymer has an intrinsic viscosity of less than 0.8 dl/g.
Claim 18
Dependent Claim
30 words
A dilation catheter balloon of claim 13 wherein the balloon has a radial expansion at 37° C. of greater than 3% at 200 psi and greater than 7% at burst.
Claim 19
Dependent Claim
27 words
A dilation catheter balloon of claim 13 wherein the random copolymer has a ratio of ethylene terephthalate units to ethylene isophthalate units of between 99:1 and 80:20.
Claim 20
Dependent Claim
20 words
A dilation catheter balloon of claim 13 wherein the balloon has a wall thickness of between 0.0076 and 0.051 mm.
Claim 21
Dependent Claim
16 words
A dilation catheter balloon of claim 13 wherein the balloon is made of only one layer.
Claim 22
Dependent Claim
44 words
A dilation catheter balloon of claim 13 wherein the force required to initiate folding of the balloon to draw it through a guide catheter is less than the force required to fold a balloon of comparable wall thickness made from biaxially oriented polyethylene terephthalate.
Claim 23
Dependent Claim
22 words
A dilation catheter balloon of claim 13 wherein the random copolymer consists of random repeating units of ethylene terephthalate and ethylene isophthalate.
Claim 24
Dependent Claim
20 words
The dilatation catheter balloon of claim 13 wherein the random copolymer has a melting point of at least 221° C.
Claim 25
Independent Claim
45 words
A method of making dilation catheter balloon comprising the steps of: a) providing tubing comprising a thermoplastic material comprising a random copolymer having random repeating units of ethylene terephthalate and ethylene isophthalate; and b) stretching and molding said tubing to form a dilation catheter balloon.
Claim 26
Independent Claim
45 words
A method of making dilation catheter balloon comprising the steps of: a) providing tubing comprising a thermoplastic material comprising a random copolymer having random repeating units of ethylene terephthalate and ethylene isophthalate; and b) stretching and molding said tubing to form a dilation catheter balloon.
References Cited (Backward Citations)
US2995779A
Cited
US3141912A
Cited
US3088173A
Cited
US3432591A
Cited
US3627579A
Cited
US3733309B1
Cited
US3733309A
Cited
US3908201A
Cited
US3865666A
Cited
US3959200A
Cited
US4093484A
Cited
US4154244A
Cited
US4254774A
Cited
US4256789A
Cited
US4256789B1
Cited
US4411055A
Cited
US4413989A
Cited
US4367747A
Cited
US4608984A
Cited
US4387833A
Cited
US4456000A
Cited
US4490421A
Cited
USRE32983E
Cited
USRE33561E
Cited
EP0135990B1
Cited
EP0355937A2
Cited
US4531943A
Cited
US4531997A
Cited
US4743258A
Cited
US4587975A
Cited
EP0186267A1
Cited
US4637396A
Cited
US4646742A
Cited
US4807619A
Cited
EP0274411A2
Cited
US4963313A
Cited
US4884573A
Cited
WO1989008473A1
Cited
EP0345051A2
Cited
US4952357A
Cited
US4950239A
Cited
US4938676A
Cited
EP0362826A2
Cited
US4906244A
Cited
US5108415A
Cited
US5156612A
Cited
US4941877A
Cited
WO1992008512A1
Cited
EP0492361A1
Cited
US5264260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-18 | 1998-01-17 | 1998-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-18 | 2002-01-17 | 2002-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-18 | 2006-01-17 | 2006-07-19 | $7700.00 | Window Closed / Lapsed |