US4600495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow through ion selective electrode
Assignee: Medtronic Inc
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Filing: 1985-08-15
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Granted: 1986-07-15
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Expires: 2005-08-15
Abstract
Abstract An improved flow through ion sensing electrode and a method for producing it. The electrode is formed of bilumen plastic tubing using one lumen as the sample path and the other lumen as a sensing chamber. By permeating a portion of the tubing with an ion selective material, an ion selective membrane integral with the chamber wall is produced. A preferred embodiment also incorporates a reference electrode.
Inventors
- 👤 Eric J. Fogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:28
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/333; G01N27/3335; B; B29; B29D; B29D23/00; B29D99/00; B29D99/005; B29K; B29K2021/00; B29K2027/00; B29K2027/06; B29K2075/00; B29L; B29L2031/00; B29L2031/755
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A flow through ion sensing electrode, comprising: a plastic tube having a proximal end, a distal end, an outer wall, a first lumen, a second lumen, and an inner wall separating said first lumen from said second lumen, said second lumen having first and second ends open to the exterior of said electrode, a portion of said tube including at least part of said inner wall impregnated with an ion selective material; first sealing means for sealing the first lumen of said tube proximal to at least part of said impregnated portion of said tube; second sealing means for sealing the first lumen of said tube distal to at least a portion of said impregnated portion of said tube; electrolyte gel filling the first lumen of said tube intermediate said first and second sealing means; and first electrode inserted in the first lumen of said tube intermediate said first and second sealing means.
Claim 2
Dependent Claim
153 words
A flow through ion sensing electrode, comprising: a plastic tube having a proximal end, a distal end, an outer wall, a first lumen, a second lumen, and an inner wall separating said first lumen from said second lumen, said second lumen having first and second ends open to the exterior of said electrode, a portion of said tube including at least part of said inner wall impregnated with an ion selective material; first sealing means for sealing the first lumen of said tube proximal to at least part of said impregnated portion of said tube; second sealing means for sealing the first lumen of said tube distal to at least a portion of said impregnated portion of said tube; electrolyte gel filling the first lumen of said tube intermediate said first and second sealing means; and first electrode inserted in the first lumen of said tube intermediate said first and second sealing means.
Claim 3
Dependent Claim
109 words
An ion sensing electrode according to claim 1 wherein said tube is impregnated with said ion selective material only distal to a first point intermediate the proximal and distal ends of said tube, and wherein the inner wall of said tube is provided with an aperture at a second point proximal to said first point, opening the first lumen of said tube to the second lumen of said tube, and further comprising: third sealing means for sealing the first lumen of said tube intermediate said first and second points, and proximal to said first electrode; and second electrode inserted in said first lumen intermediate said and third sealing means.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |