US2886496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of determining concentration of dissolved substance
Assignee: Leeds and Northrup Co
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Filing: 1956-03-20
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Granted: 1959-05-12
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Expires: 1976-03-20
Abstract
No abstract record available.
Inventors
- 👤 Edgar L Eckfeldt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:35
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/42; G01N27/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
THE METHOD OF DETERMINING THE CONTRATION OF A SUBSTANCE IN A SOLUTION HAVING AN OXIDATION-REDUCTION POTENTIAL MATERIALLY ABOVE THAT OF A FERROUS SYSTEM WHICH COMPRISES PASSING ELECTROLYZING CURRENT THROUGH AN ELECTROLYTE IN A CATHODIC REACTION ZONE ISOLATED FROM AN ASSOCIATED ANODIC ZONE, SAID CATHODIC ZONE HAVING PRESENT THEREIN FERRIC IRON IN CONCENTRATION BETWEEN ABOUT 0.04% AND 5% BY WEIGHT TO PRODUCE FERROUS IONS TO CHANGE THE CONCENTRATION OF SAID SUBSTANCE IN SAID ELECTROLYTE BY AN AMOUNT WHICH WHICH BRINGS IT TO AN END POINT, SAID ELECTROLYTE BEING CHARACTERIZED BY THE ABSENCE OF REACTION-AFFECTING IMPURITIES INCLUDINGFERROUS IRON AND OTHER MATERIALS WHICH REACT IN THE OXIDATION AND REDUCTION CONDITIONS OF SAID ZONE, SAID ELECTROLYTE HAVING A PH VALUE BETWEEN ABOUT O.3 AND 1.8, SAID SUBSTANCE HAVING A CAPABILITY OF QUANTITATIVE REACTION, AT LEAST IN PART, WITH SAID FERROUS IONS, AND MEASURING THE ELECTRICITY EMPLOYED IN THE ELECTROLYSIS AS AS MEASURE OF THE CONCENTRATION OF THE SUBSTANCE IN THE SOLUTION.
Claim 2
Independent Claim
157 words
THE METHOD OF DETERMINING THE CONTRATION OF A SUBSTANCE IN A SOLUTION HAVING AN OXIDATION-REDUCTION POTENTIAL MATERIALLY ABOVE THAT OF A FERROUS SYSTEM WHICH COMPRISES PASSING ELECTROLYZING CURRENT THROUGH AN ELECTROLYTE IN A CATHODIC REACTION ZONE ISOLATED FROM AN ASSOCIATED ANODIC ZONE, SAID CATHODIC ZONE HAVING PRESENT THEREIN FERRIC IRON IN CONCENTRATION BETWEEN ABOUT 0.04% AND 5% BY WEIGHT TO PRODUCE FERROUS IONS TO CHANGE THE CONCENTRATION OF SAID SUBSTANCE IN SAID ELECTROLYTE BY AN AMOUNT WHICH WHICH BRINGS IT TO AN END POINT, SAID ELECTROLYTE BEING CHARACTERIZED BY THE ABSENCE OF REACTION-AFFECTING IMPURITIES INCLUDINGFERROUS IRON AND OTHER MATERIALS WHICH REACT IN THE OXIDATION AND REDUCTION CONDITIONS OF SAID ZONE, SAID ELECTROLYTE HAVING A PH VALUE BETWEEN ABOUT O.3 AND 1.8, SAID SUBSTANCE HAVING A CAPABILITY OF QUANTITATIVE REACTION, AT LEAST IN PART, WITH SAID FERROUS IONS, AND MEASURING THE ELECTRICITY EMPLOYED IN THE ELECTROLYSIS AS AS MEASURE OF THE CONCENTRATION OF THE SUBSTANCE IN THE SOLUTION.
References Cited (Backward Citations)
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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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |