US3574079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for oxygen determination
Assignee: Gesellschaft zur Foerderung der Forschung an der Eidgenoessischen Technischen Hochschule
•
Filing: 1969-03-14
•
Granted: 1971-04-06
•
Expires: 1989-03-14
Abstract
Abstract IN AN ELECTROCHEMICAL APPARATUS FOR DETERMINING OXYGEN CONCENTRATION IN A LIQUID, SAID APPARATUS INCLUDING AN ANODE AND A CATHODE, THE ELECTRODES ARE TUBULAR SECTIONS HAVING ANNULAR PROFILES AND THEIR SURFACES ARE COVERED BY ELECTRICALLY INSULATING LAYERS EXCEPTING FOR ONE FRONTAL AREA ON EACH ELECTRODE. THE ELECTRODES ARE PROVIDED WITH ROTATABLE ABRADING MEANS, FITTING SNUGLY AGAINST THE UNCOVERED AREAS OF THE ELECTRODES AND AGAINST SURFACES SAID AREAS, FOR CLEANING SAID AREAS AND ADJACENT SURFACES.
Inventors
- 👤 Laslo Kalman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:16
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/28; G01N27/30; G01N27/38
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |