Patent US2204545A successfully refreshed from Google Patents.
US3672841A
Expired / Lapsed
US
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Analysis of organic and inorganic water pollutants
Assignee: Veolia WTS Systems USA Inc
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Filing: 1970-12-14
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Granted: 1972-06-27
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Expires: 1990-12-14
Abstract
Abstract A METHOD IS PROVIDED FOR REPLENISLING THE CATALYST COMPONENT OF AN ANALYZER ADAPTED TO MEASURE THE TOTAL INORGANIC CARBON CONTENT OF A FLUID SAMPLE, THE NEED FOR WATER ANALYSIS HAS BECOME INCREASINGLY IMPORTANT WITH EXPANDING INTEREST IN THE ABATEMENT OF WATER POLLUTION, AND FOR DETERMINING LEAKS IN VESSELS SUCH AS HEAT EXCHANGERS USED IN INDUSTRY. ONE SET OF PARAMETERS OF GREAT UTILITY HAS BEEN THE CONCENTRATIONS OF CARBON; ORGANIC, INORGANIC AND TOTAL.
Inventors
- 👤 Donald C Freeman Jr
- 👤 Louis J Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/18; G01N33/1826; G01N33/1846; G01N31/00; G01N31/005; Y; Y10; Y10T; Y10T436/00; Y10T436/23; Y10T436/235
Claims Analysis
Total Claims: 0
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |