US2585811A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical method of automatically determining available chlorine in an aqueous liquid
Assignee: US Filter Wallace and Tiernan Inc
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Filing: 1949-07-02
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Granted: 1952-02-12
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Expires: 1969-07-02
Abstract
No abstract record available.
Inventors
- 👤 Henry C Marks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:32
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/403; G01N27/404; G01N27/4045
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF AUTOMATICALLY AND ACCURATELLY DETECTING THE CONTENT OF AVAILABLE CHLORINE IN AN AQUEOUS LIQUID, WHEREIN ACCURATE-RESULTS ARE OBTAINABLE EVEN WHEN SOME OF SAID AVAILABLE CHLORINE IS IN THE FORM OF DICHLORAMINE OR NCL3 OR BOTH, WHICH COMPRISES THE STEPS OF ADDING AN AMOUNT OF A WATER-SOLUBLE IODIDE TO SUCCESSIVE PORTIONS OF SAID LIQUID HAVING A PH IN THE RANGE OF ABOUT 3.5 TO ABOUT 5.0 TO ESTABLISH IN SAID PORTIONS AN IODIDE CONCENTRATION AT LEAST STOICHIOMETRICALLY EQUIVALENT TO THE AMOUNT OF SAID AVAILABLE CHLORINE TO BE DETECTED, THEREAFTER AND AFTER A TIME PERIOD OF AT LEAST ABOUT ONE MINUTE TO AFFORD TIME FOR THE SUBSTANTIALLY QUANTITATIVE COMPLETION OF THE REACTION BETWEEN SAID AVAILABLE CHLORINE AND THE ADDED IODIDE, INTRODUCING SAID PORTIONS SUCCESSIVELY INTO CONTACT WITH THE POLARIZED CATH-
Claim 2
Independent Claim
130 words
THE METHOD OF AUTOMATICALLY AND ACCURATELLY DETECTING THE CONTENT OF AVAILABLE CHLORINE IN AN AQUEOUS LIQUID, WHEREIN ACCURATE-RESULTS ARE OBTAINABLE EVEN WHEN SOME OF SAID AVAILABLE CHLORINE IS IN THE FORM OF DICHLORAMINE OR NCL3 OR BOTH, WHICH COMPRISES THE STEPS OF ADDING AN AMOUNT OF A WATER-SOLUBLE IODIDE TO SUCCESSIVE PORTIONS OF SAID LIQUID HAVING A PH IN THE RANGE OF ABOUT 3.5 TO ABOUT 5.0 TO ESTABLISH IN SAID PORTIONS AN IODIDE CONCENTRATION AT LEAST STOICHIOMETRICALLY EQUIVALENT TO THE AMOUNT OF SAID AVAILABLE CHLORINE TO BE DETECTED, THEREAFTER AND AFTER A TIME PERIOD OF AT LEAST ABOUT ONE MINUTE TO AFFORD TIME FOR THE SUBSTANTIALLY QUANTITATIVE COMPLETION OF THE REACTION BETWEEN SAID AVAILABLE CHLORINE AND THE ADDED IODIDE, INTRODUCING SAID PORTIONS SUCCESSIVELY INTO CONTACT WITH THE POLARIZED CATH-
References Cited (Backward Citations)
GB282170A
Cited
US2370871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |