US3140918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous conductometric analysis of an aldehyde
Assignee: Union Carbide Corp
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Filing: 1960-09-14
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Granted: 1964-07-14
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Expires: 1980-09-14
Abstract
No abstract record available.
Inventors
- 👤 Italo A Capuano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:25
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/02; G01N27/021; G01N27/04; G01N27/06; Y; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/200833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
143 words
A METHOD FOR DETERMINING THE CONCENTRATION OF AN ALDEHYDE PRESENT IN A FIRST SOLUTION, SAID METHOD COMPRISING THE STEPS OF PASSING SCHIFF REAGENT THROUGH A FIRST CONDUCTOMETRIC MEASURING CELL, DEVELOPING IN SAID FIRST CELL A FIRST ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO ELECTRICAL CONDUCTIVITY OF SAID SCHIFF REAGENT, REACTING SAID SCHIFF REAGENT AFTER ITS PASSAGE THROUGH SAID FIRST CELL WITH THE SAID FIRST SOLUTION TO FORM A SECOND SOLUTION CONTAINING SULFUROUS ACID, PASSING SAID SECOND SOLUTION THROUGH A SECOND CONDUCTOMETRIC MEASURING CELL, DEVELOPING IN SAID SECOND CELL A SECOND ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO ELECTRICAL CONDUCTIVITY OF SAID SECOND SOLUTION AND SUBTRACTING SAID FIRST SIGNAL FROM SAID SECOND SIGNAL TO OBTAIN A THIRD SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO THE CONCENTRATION OF THE SULFUROUS ACID IN SAID SECOND SOLUTION AND REPRESENTATIVE OF THE CONCENTRATION OF ALDEHYDE IN SAID FIRST SOLUTION.
Claim 2
Independent Claim
143 words
A METHOD FOR DETERMINING THE CONCENTRATION OF AN ALDEHYDE PRESENT IN A FIRST SOLUTION, SAID METHOD COMPRISING THE STEPS OF PASSING SCHIFF REAGENT THROUGH A FIRST CONDUCTOMETRIC MEASURING CELL, DEVELOPING IN SAID FIRST CELL A FIRST ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO ELECTRICAL CONDUCTIVITY OF SAID SCHIFF REAGENT, REACTING SAID SCHIFF REAGENT AFTER ITS PASSAGE THROUGH SAID FIRST CELL WITH THE SAID FIRST SOLUTION TO FORM A SECOND SOLUTION CONTAINING SULFUROUS ACID, PASSING SAID SECOND SOLUTION THROUGH A SECOND CONDUCTOMETRIC MEASURING CELL, DEVELOPING IN SAID SECOND CELL A SECOND ELECTRICAL SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO ELECTRICAL CONDUCTIVITY OF SAID SECOND SOLUTION AND SUBTRACTING SAID FIRST SIGNAL FROM SAID SECOND SIGNAL TO OBTAIN A THIRD SIGNAL HAVING AN AMPLITUDE PROPORTIONAL TO THE CONCENTRATION OF THE SULFUROUS ACID IN SAID SECOND SOLUTION AND REPRESENTATIVE OF THE CONCENTRATION OF ALDEHYDE IN SAID FIRST SOLUTION.
References Cited (Backward Citations)
US2559090A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-07-14 | 1968-01-13 | 1968-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-14 | 1972-01-13 | 1972-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-14 | 1976-01-13 | 1976-07-14 | $7700.00 | Window Closed / Lapsed |