Patent US3558279A successfully refreshed from Google Patents.
US3558279A
Expired / Lapsed
US
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Electrochemical sensor device
Assignee: Veolia WTS Systems USA Inc
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Filing: 1967-06-20
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Granted: 1971-01-26
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Expires: 1987-06-20
Abstract
Abstract AN INSTRUMENT FOR MEASURING THE CONCENTRATION OF A WEAKLY WATER-IONIZABLE GASEOUS COMPONENT SUCH AS CARBON DIOXIDE WHICH MAY BE CONTAINED IN AN AMBIENT ATMOSPHERE. SUCH DEVICE IS INDEPENDENT OF THE TEMPERATURE AND TOTAL PRESSURE OF THE ATMOSPHERE AND IS BASED ON THE MEASURABLE CHANGES OCCURRING IN THE ELECRICAL PROPERTIES OF AN ION-EXCHANGE MATERIAL WHEN IN THE PRESENCE OF THE PARTICULAR GAS TO BE MEASURED.
Inventors
- 👤 Wayne A Mcrae
- 👤 Stuart G Mcgriff
- 👤 Frank B Leitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:44
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12; G01N27/125; G01N27/126; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/204998
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |