Patent US5318531A successfully refreshed from Google Patents.
US5318531A
Expired / Lapsed
US
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Infusion balloon catheter
Assignee: Cordis Corp
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Filing: 1992-07-13
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Granted: 1994-06-07
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Expires: 2012-07-13
Abstract
Abstract A balloon catheter comprises a catheter shaft and a balloon carried on the shaft, an inflation lumen being provided. The balloon comprises a plurality of holes of a size to permit medication delivered through the lumen to pass outwardly through the holes. The balloon carries on an outer surface a substantially hydrophilic, tubular microporous membrane covering the holes, to break up streams of flowing medication.
Inventors
- 👤 James E. Leone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:14
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61M16/00; A61M16/04; A61M16/0434; A61M16/0443; A61M16/0475; A61M16/0477; A61M16/0481; A61M25/1011; A61M2025/1013; A61M2025/1043; A61M2025/105; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
92 words
A balloon catheter which comprises a catheter shaft and a balloon carried on said catheter shaft, a lumen defined by said catheter shaft which communicates between a space located within said balloon and a proximal end portion of said catheter shaft, said balloon comprising a plurality of holes of a size to permit medication delivered through said lumen to pass outwardly through said holes, said balloon having an outer surface and carrying on said outer surface a tubular, substantially hydrophilic, microporous membrane covering said holes to break up streams of flowing medication.
Claim 2
Dependent Claim
92 words
A balloon catheter which comprises a catheter shaft and a balloon carried on said catheter shaft, a lumen defined by said catheter shaft which communicates between a space located within said balloon and a proximal end portion of said catheter shaft, said balloon comprising a plurality of holes of a size to permit medication delivered through said lumen to pass outwardly through said holes, said balloon having an outer surface and carrying on said outer surface a tubular, substantially hydrophilic, microporous membrane covering said holes to break up streams of flowing medication.
Claim 3
Dependent Claim
48 words
The catheter of claim 1 in which said balloon defines a central, generally cylindrical portion and tapered end portions having minimum diameter ends adhered to the catheter shaft, said tubular, microporous membrane being carried by the cylindrical portion of said balloon and spaced from the tapered end portions.
Claim 4
Dependent Claim
47 words
The catheter of claim 2 in which said balloon defines a central portion of said generally cylindrical portion that is of less diameter than ends of said cylindrical portion, whereby a generally cylindrical space is normally defined between central portions of said balloon and said microporous membrane.
Claim 5
Dependent Claim
16 words
The catheter of claim 1 in which said tubular, microporous, membrane is made of polycarbonate resin.
Claim 6
Dependent Claim
23 words
The catheter of claim 1 in which the micropores of said membrane are smaller and more numerous than the holes of said balloon.
Claim 7
Dependent Claim
35 words
The catheter of claim 1 in which the micropores of said membrane are essentially from 0.4 to 3 microns in diameter, the holes of said balloon being essentially from 5 to 100 microns in diameter.
Claim 8
Dependent Claim
27 words
The catheter of claim 1 in which the number of said micropores per square centimeter of said membrane is about one hundred thousand to five hundred million.
Claim 9
Dependent Claim
21 words
The catheter of claim 7 in which the number of said holes in the balloon is essentially from 20 to 1000.
Claim 10
Dependent Claim
16 words
The catheter of claim 1 in which said microporous membrane is coated with a hydrophilic agent.
Claim 11
Dependent Claim
161 words
A balloon catheter which comprises a catheter shaft and a balloon carried on said catheter shaft, a lumen defined by said catheter shaft which communicates between a space located within said balloon and a proximal end portion of said catheter shaft, said balloon comprising a plurality of holes of a size to permit medication delivered through said lumen to pass outwardly through said holes, said balloon having an outer surface and carrying on said outer surface a tubular, substantially hydrophilic, microporous membrane covering said holes to break up streams of flowing medication, said balloon defining a central, generally cylindrical portion and tapered end portions having minimum diameter ends adhered to the catheter shaft, said tubular, microporous membrane being carried by the cylindrical portion of said balloon and spaced from the tapered end portions, the micropores of said membrane being essentially from 0.4 to 3 microns in diameter, the holes of said balloon being essentially from 5 to 100 microns in diameter.
Claim 12
Dependent Claim
161 words
A balloon catheter which comprises a catheter shaft and a balloon carried on said catheter shaft, a lumen defined by said catheter shaft which communicates between a space located within said balloon and a proximal end portion of said catheter shaft, said balloon comprising a plurality of holes of a size to permit medication delivered through said lumen to pass outwardly through said holes, said balloon having an outer surface and carrying on said outer surface a tubular, substantially hydrophilic, microporous membrane covering said holes to break up streams of flowing medication, said balloon defining a central, generally cylindrical portion and tapered end portions having minimum diameter ends adhered to the catheter shaft, said tubular, microporous membrane being carried by the cylindrical portion of said balloon and spaced from the tapered end portions, the micropores of said membrane being essentially from 0.4 to 3 microns in diameter, the holes of said balloon being essentially from 5 to 100 microns in diameter.
Claim 13
Dependent Claim
48 words
The catheter of claim 10 in which said balloon defines a central portion of said generally cylindrical portion that is of less diameter than the ends of said cylindrical portion, whereby a generally cylindrical space is normally defined between central portions of said balloon and said microporous membrane.
Claim 14
Dependent Claim
23 words
The catheter of claim 11 in which the number of said micropores per square centimeter of said membrane is about 100,000 to 500,000,000.
Claim 15
Dependent Claim
21 words
The catheter of claim 12 in which the number of said holes in the balloon is essentially from 20 to 1,000.
Claim 16
Dependent Claim
16 words
The catheter of claim 13 in which said microporous membrane is coated with a hydrophilic agent.
Claim 17
Dependent Claim
23 words
The catheter of claim 10 in which the micropores of said membrane are smaller and more numerous than the holes of said balloon.
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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) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |