Patent US4565666A successfully refreshed from Google Patents.
US4565666A
Expired / Lapsed
US
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Method of producing combination ion selective sensing electrode
Assignee: Medtronic Inc
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Filing: 1984-07-18
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Granted: 1986-01-21
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Expires: 2004-07-18
Abstract
Abstract A combination ion sensing and reference electrode and a method for producing it. The electrode is formed of bi-lumen plastic tubing using one lumen as sensing chamber and the other as a reference chamber. A portion of the sensing chamber extends distally relative to the reference chamber, and is permeated with an ion selective material by soaking that portion in a solution containing the ion selective material. The method of manufacture is thereby simplified and sealing of the chambers is improved.
Inventors
- 👤 Patrick T. Cahalan
- 👤 Michelle A. Schwinghammer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/4035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A method for producing an ion sensing electrode, comprising the following ordered steps: dissolving an ion selective material in a solvent which is a swelling agent for a plastic; subsequently soaking in said solvent a tube fabricated of said plastic and having a proximal end, a distal end, and outer wall, a first lumen, a second lumen and an inner wall separating said first and second lumens, said tube soaked only distal to a first point intermediate the proximal and distal ends of said tube, until said tube swells; subsequently drying said tube until said solvent evaporates; and filling the first and second lumens of said tube with an electrolyte; said method further comprising the following non-ordered steps which may be performed in any convenient order relative to said ordered steps: removing that portion of the outer wall of said tube located exterior to said second lumen, intermediate the distal end of said tube and a second point proximal to said first point; sealing the distal end of the first lumen of said tube; and inserting first and second electrodes into the first and second lumens of said tube.
Claim 2
Independent Claim
189 words
A method for producing an ion sensing electrode, comprising the following ordered steps: dissolving an ion selective material in a solvent which is a swelling agent for a plastic; subsequently soaking in said solvent a tube fabricated of said plastic and having a proximal end, a distal end, and outer wall, a first lumen, a second lumen and an inner wall separating said first and second lumens, said tube soaked only distal to a first point intermediate the proximal and distal ends of said tube, until said tube swells; subsequently drying said tube until said solvent evaporates; and filling the first and second lumens of said tube with an electrolyte; said method further comprising the following non-ordered steps which may be performed in any convenient order relative to said ordered steps: removing that portion of the outer wall of said tube located exterior to said second lumen, intermediate the distal end of said tube and a second point proximal to said first point; sealing the distal end of the first lumen of said tube; and inserting first and second electrodes into the first and second lumens of said tube.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |