US3791376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microsonde for catheter use, for the continuous measurement of partial oxygen pressure
Assignee: Individual
•
Filing: 1970-12-14
•
Granted: 1974-02-12
•
Expires: 1990-12-14
Abstract
Abstract Microsonde for catheter use, operating under the principle of oxygen polarography, namely intended for continuous and instantaneous determination of oxygen partial pressure in blood vessels. The measurement head of said sonde has a diameter of 0.6 mm, comprises a platinum wire as a cathode and a paste containing powdered silver as anode. The head is covered with a first membrane of collodion against said anode, an electrolyteimpregnated support and a selectively gas-permeable thin membrane.
Inventors
- 👤 B Rybak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:28
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/145; A61B5/14542; A61B5/1468; A61B5/1473
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
19 words
The miniaturized micro-sonde of claim 1, further characterized by said inert filling being constituted by a water repellant resin.
Claim 2
Dependent Claim
37 words
The miniaturized micro-sonde of claim 1, further characterized by said hardened mixture comprising approximately one part of said powdered silver having granules ranging substantially between 37 to 160 microns in size to one part of said cement.
Claim 3
Dependent Claim
21 words
The miniaturized micro-sonde of claim 1, further characterized by said electrolytic solution being an aqueous 0.2 M solution of potassium chloride.
Claim 4
Dependent Claim
17 words
The miniaturized micro-sonde of claim 4, further characterized by said thin support being of a textile material.
Claim 5
Dependent Claim
15 words
The miniaturized micro-sonde of claim 4, further characterized by said thin support being of paper.
Claim 6
Dependent Claim
15 words
The miniaturized micro-sonde of claim 4, further characterized by said thin support being of gel.
References Cited (Backward Citations)
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Cited
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Cited
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US3562130A
Cited
US3575836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |