US3763850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Or measuring the partial pressure of a gas in a fluid
Assignee: F Hoffmann La Roche AG
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Filing: 1971-12-29
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Granted: 1973-10-09
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Expires: 1991-12-29
Abstract
Abstract A device for measuring the partial pressure of a gas in a liquid or gaseous fluid, and more particularly, the partial pressure of oxygen in the blood comprising, a wafer having surface elements in a manner of a thin-layer integrated circuit defining a pair of electrodes and a reference electrode. The device is secured to a catheter tip by a casing whereby an electrolyte fluid is introduced between the casing and the measuring device.
Inventors
- 👤 C Gaudebout
- 👤 J Quercy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:55
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473; A61B5/1477
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
81 words
A device for use in measuring the partial pressure of a gas in a liquid or gaseous fluid and more particularly the partial pressure of oxygen in the blood, comprising: wafer means including a thin-layer surface integrated circuit defining a pair of electrochemical sensor electrodes; selective membrane means permeable to oxygen, covering said sensor electrodes; an electrolyte layer disposed between said sensor electrodes and said membrane means; and, lead means for electrical connection of said integrated circuit to a measuring instrument.
Claim 2
Independent Claim
81 words
A device for use in measuring the partial pressure of a gas in a liquid or gaseous fluid and more particularly the partial pressure of oxygen in the blood, comprising: wafer means including a thin-layer surface integrated circuit defining a pair of electrochemical sensor electrodes; selective membrane means permeable to oxygen, covering said sensor electrodes; an electrolyte layer disposed between said sensor electrodes and said membrane means; and, lead means for electrical connection of said integrated circuit to a measuring instrument.
Claim 3
Dependent Claim
22 words
A device according to claim 1: said integrated circuit including a reference electrode; and, temperature sensor means secured to said wafer means.
Claim 4
Dependent Claim
22 words
A device according to claim 2, whereby the temperature sensor means is a thermistor mounted on a surface of said wafer means.
Claim 5
Dependent Claim
39 words
A device according to claim 2, whereby said wafer means is of silicon and said temperature sensor means is a thermistor deposited on one face of the wafer means in the form of a thin-layer of a semi-conductor material.
Claim 6
Dependent Claim
54 words
A device according to claim 1 including: means defining with said membrane means a casing for enclosing said wafer means whereby said casing is of larger dimensions than said wafer means for accommodating an electrolyte therebetween; and, conduit means connected to said casing for receiving and evacuating the electrolyte with regard to the casing.
Claim 7
Dependent Claim
96 words
A catheter device for use in measuring in vivo the partial pressure of oxygen of the blood comprising: a catheter; wafer means having a thin-layer surface integrated circuit defining a pair of electrochemical sensor electrodes ad a reference electrode; casing means for enclosing said wafer means within an electrolyte fluid and including selective membrane means permeable to oxygen covering said sensor electrodes; and said catheter having a depression along its longitudinal wall at which the casing means is secured and the membrane exposed; and lead means for electrical connection of said electrodes to a measuring instrument.
Claim 8
Dependent Claim
96 words
A catheter device for use in measuring in vivo the partial pressure of oxygen of the blood comprising: a catheter; wafer means having a thin-layer surface integrated circuit defining a pair of electrochemical sensor electrodes ad a reference electrode; casing means for enclosing said wafer means within an electrolyte fluid and including selective membrane means permeable to oxygen covering said sensor electrodes; and said catheter having a depression along its longitudinal wall at which the casing means is secured and the membrane exposed; and lead means for electrical connection of said electrodes to a measuring instrument.
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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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |