Patent US2977293A successfully refreshed from Google Patents.
US2977293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the determination of ion concentrations and redox potentials, particularly at elevated temperatures
Assignee: Individual
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Filing: 1957-03-13
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Granted: 1961-03-28
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Expires: 1977-03-13
Abstract
No abstract record available.
Inventors
- 👤 Ingold Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:31
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/4035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A METHOD OF OPERATING MEASURING ASSEMBLIES PARTICULARLY SUITABLE FOR THE DETERMINATION OF ION ACTIVITY IN THE RANGE OF 80* TO AT LEAST 130*C. BY MEANS OF A REFERENCE ELECTRODE AND A MEASURING GLASS ELECTRODE, COMPRISING SUPPLYING BOTH ELECTRODES WITH A LEAD-OFF SYSTEM OF A SILVER-SILVER CHLORIDE HALF-CELLS INTO WHICH A SILVER WIRE DIPS INTO AN AQUEOUS SOLUTION OF A SATURATED SOLUTION OF NEUTRAL ALKALI CHLORIDE AND IS AT THE SAME TIME SURROUNDED AND IN CONTACT WITH AN EXCESS OF SILVER CHLORIDE PARTICLES SO THAT THE ELECTROLYTE IS MAINTAINED AT THE CONCENTRATION CORRESPONDING TO THE WORKING TEMPERATURE BY DISSOLUTION OF THE SILVER CHLORIDE PRESENT IN A STATE OF HIGH DISPERSION AND IN SURPLUS QUANTITY, SO THAT THE POTENTIAL OF SAID HALFCELLS REMAINS CONSTANT AND REPRODUCIBLE ALSO FOR ELEVATED TEMPERATURES IN THE RANGE FROM 80* TO AT LEAST 130*C.
Claim 2
Independent Claim
137 words
A METHOD OF OPERATING MEASURING ASSEMBLIES PARTICULARLY SUITABLE FOR THE DETERMINATION OF ION ACTIVITY IN THE RANGE OF 80* TO AT LEAST 130*C. BY MEANS OF A REFERENCE ELECTRODE AND A MEASURING GLASS ELECTRODE, COMPRISING SUPPLYING BOTH ELECTRODES WITH A LEAD-OFF SYSTEM OF A SILVER-SILVER CHLORIDE HALF-CELLS INTO WHICH A SILVER WIRE DIPS INTO AN AQUEOUS SOLUTION OF A SATURATED SOLUTION OF NEUTRAL ALKALI CHLORIDE AND IS AT THE SAME TIME SURROUNDED AND IN CONTACT WITH AN EXCESS OF SILVER CHLORIDE PARTICLES SO THAT THE ELECTROLYTE IS MAINTAINED AT THE CONCENTRATION CORRESPONDING TO THE WORKING TEMPERATURE BY DISSOLUTION OF THE SILVER CHLORIDE PRESENT IN A STATE OF HIGH DISPERSION AND IN SURPLUS QUANTITY, SO THAT THE POTENTIAL OF SAID HALFCELLS REMAINS CONSTANT AND REPRODUCIBLE ALSO FOR ELEVATED TEMPERATURES IN THE RANGE FROM 80* TO AT LEAST 130*C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |