Patent US2862859A successfully refreshed from Google Patents.
US2862859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detecting impurities in gases
Assignee: DR OTTO HEINRICH DRAGER
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Filing: 1956-02-08
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Granted: 1958-12-02
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Expires: 1976-02-08
Abstract
No abstract record available.
Inventors
- 👤 Grosskopf Karl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:40
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/04; G01N27/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
88 words
A METHOD FOR DETECTING IMPURITIES IN A FLUID BY MEANS OF ELECTRODES AT LEAST ONE OF WHICH HAS A BLOCKING LAYER THEREON AND AN ELECTROLYTE, SAID IMPURITIES BEING CAPABLE OF AT LEAST PARTIALLY DESTROYING THE BLOCKING LAYER IN THE PRESENCE OF THE ELECTROLYTE, WHICH COMPRISES BRINGING SAID IMPURITIES INTO CONTACT WITH THE ELECTRODES AND ELECTROLYTE AND SUPPLYING DIRECT ELECTRIC CURRENT TO SAID ELECTRODES IN A DIRECTION TO BE NORMALLY BLOCKED BY SAID BLOCKING LAYER, WHEREBY AN INCREASE IN SAID CURRENT INDICATES THE PRESENCE OF IMPURITIES IN THE LIQUID.
Claim 2
Independent Claim
88 words
A METHOD FOR DETECTING IMPURITIES IN A FLUID BY MEANS OF ELECTRODES AT LEAST ONE OF WHICH HAS A BLOCKING LAYER THEREON AND AN ELECTROLYTE, SAID IMPURITIES BEING CAPABLE OF AT LEAST PARTIALLY DESTROYING THE BLOCKING LAYER IN THE PRESENCE OF THE ELECTROLYTE, WHICH COMPRISES BRINGING SAID IMPURITIES INTO CONTACT WITH THE ELECTRODES AND ELECTROLYTE AND SUPPLYING DIRECT ELECTRIC CURRENT TO SAID ELECTRODES IN A DIRECTION TO BE NORMALLY BLOCKED BY SAID BLOCKING LAYER, WHEREBY AN INCREASE IN SAID CURRENT INDICATES THE PRESENCE OF IMPURITIES IN THE LIQUID.
Claim 3
Independent Claim
92 words
A DEVICE FOR TESTING IMPURITIES IN FLUIDS WHICH COMPRISES AN ELECTRIC VALVE CELL HAVING ELECTRODES AND AN ELECTROLYTE BETWEEN AND IN CONTACT WITH THE ELECTRODES, AT LEAST ONE OF SAID ELECTRODES HAVING A BLOCKING LAYER THEREON CAPABLE OF BEING AT LEAST PARTIALLY DESTROYED BY THE IMPURITIES, PUMP MEANS TO BRING SUCH IMPURITIES INTO CONTACT WITH THE ELECTRODES HAVING THE BLOCKING LAYER THEREON, AN AMMETER, A CIRCUIT INCLUDING SAID ELECTRODES AND SAID INSTRUMENTS, AND MEANS TO SUPPLY DIRECT CURRENT TO SAID CIRCUIT IN A DIRECTION TO BE NORMALLY BLOCKED BY SAID BLOCKING LAYER.
Claim 4
Independent Claim
92 words
A DEVICE FOR TESTING IMPURITIES IN FLUIDS WHICH COMPRISES AN ELECTRIC VALVE CELL HAVING ELECTRODES AND AN ELECTROLYTE BETWEEN AND IN CONTACT WITH THE ELECTRODES, AT LEAST ONE OF SAID ELECTRODES HAVING A BLOCKING LAYER THEREON CAPABLE OF BEING AT LEAST PARTIALLY DESTROYED BY THE IMPURITIES, PUMP MEANS TO BRING SUCH IMPURITIES INTO CONTACT WITH THE ELECTRODES HAVING THE BLOCKING LAYER THEREON, AN AMMETER, A CIRCUIT INCLUDING SAID ELECTRODES AND SAID INSTRUMENTS, AND MEANS TO SUPPLY DIRECT CURRENT TO SAID CIRCUIT IN A DIRECTION TO BE NORMALLY BLOCKED BY SAID BLOCKING LAYER.
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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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |