Patent US2744866A successfully refreshed from Google Patents.
US2744866A
Expired / Lapsed
US
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Iron retention in aqueous solution
Assignee: W H & L D Betz
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Filing: 1952-03-25
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Granted: 1956-05-08
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Expires: 1972-03-25
Abstract
No abstract record available.
Inventors
- 👤 Kahler Harry Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:48
CPC Classifications
C; C02; C02F; C02F5/00; C02F5/08; C02F5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
THE PROCESS OF TREATING A WATER SUPPLY FROM A WELL PREPARATORY TO USE IN A NON-EVAPORATIVE WATER-USING DEVICE, WHICH WATER SUPPLY CONTAINS A SUBSTANTIAL AMOUNT OF IRON IN SOLUTION, HAS AN ALKALINITY AS CALCIUM CARBONATE BETWEEN 0 AND 300 P. P. M., AND IS NONAERATED, WHICH COMPRISES ADDING A WATER SOLUBLE LIGNIN TO THE WATER SUPPLY, SAID LIGNIN BEING ADDED TO SAID WATER SUPPLY BETWEEN ITS SOURCE AND SAID WATER-USING DEVICE, SAID WATER SOLUBLE LIGNIN BEING ADDED IN A CONCENTRATION OF FROM 0.2 TO 200 P. P. M.
Claim 2
Dependent Claim
88 words
THE PROCESS OF TREATING A WATER SUPPLY FROM A WELL PREPARATORY TO USE IN A NON-EVAPORATIVE WATER-USING DEVICE, WHICH WATER SUPPLY CONTAINS A SUBSTANTIAL AMOUNT OF IRON IN SOLUTION, HAS AN ALKALINITY AS CALCIUM CARBONATE BETWEEN 0 AND 300 P. P. M., AND IS NONAERATED, WHICH COMPRISES ADDING A WATER SOLUBLE LIGNIN TO THE WATER SUPPLY, SAID LIGNIN BEING ADDED TO SAID WATER SUPPLY BETWEEN ITS SOURCE AND SAID WATER-USING DEVICE, SAID WATER SOLUBLE LIGNIN BEING ADDED IN A CONCENTRATION OF FROM 0.2 TO 200 P. P. M.
References Cited (Backward Citations)
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Cited
US2269315A
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US2318663A
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US2304850A
Cited
US2505457A
Cited
US2576386A
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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) | 1959-05-08 | 1959-11-07 | 1960-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-08 | 1963-11-07 | 1964-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-08 | 1967-11-07 | 1968-05-08 | $7700.00 | Window Closed / Lapsed |