US3102789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Determination of iron in boiler water
Assignee: Babcock and Wilcox Co
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Filing: 1959-04-01
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Granted: 1963-09-03
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Expires: 1979-04-01
Abstract
No abstract record available.
Inventors
- 👤 Edward A Pirsh
- 👤 Nathan L Dickinson
- 👤 Donald N Felgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:32
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/005; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
93 words
THE METHOD OF DETERMINING THE IRON CONTACT OF BOILER FEED WATER WHICH COMPRISES THE STEPS OF OBTAINING A SAMPLE OF SAID BOILER FEED WATER, MAINTAINING THE ALKALINITY OF SAID SAMPLE AT A PH VALUE NOT EXCEEDING 9.6, INTRODUCING HYDROGEN PEROXIDE TO SAID FEED WATER SAMPLE TO OXIDIZE THE IRON IN SAID SAMPLE, FILTERING A SELECTED VOLUME OF SAID SAMPLE TO RETAIN IRON OXIDE ON THE FILTER, AND COMPARING THE COLOR OF SAID RETAINED IRON OXIDE WITH A COLOR STANDARD TO OBTAIN A QUANTITATIVE VALUE OF THE IRON IN SAID BOILER FEED WATER SAMPLE.
Claim 2
Independent Claim
93 words
THE METHOD OF DETERMINING THE IRON CONTACT OF BOILER FEED WATER WHICH COMPRISES THE STEPS OF OBTAINING A SAMPLE OF SAID BOILER FEED WATER, MAINTAINING THE ALKALINITY OF SAID SAMPLE AT A PH VALUE NOT EXCEEDING 9.6, INTRODUCING HYDROGEN PEROXIDE TO SAID FEED WATER SAMPLE TO OXIDIZE THE IRON IN SAID SAMPLE, FILTERING A SELECTED VOLUME OF SAID SAMPLE TO RETAIN IRON OXIDE ON THE FILTER, AND COMPARING THE COLOR OF SAID RETAINED IRON OXIDE WITH A COLOR STANDARD TO OBTAIN A QUANTITATIVE VALUE OF THE IRON IN SAID BOILER FEED WATER SAMPLE.
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) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |