Patent US2845332A successfully refreshed from Google Patents.
US2845332A
Expired / Lapsed
US
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Production of ammonium sulfate and ferrous carbonate from ferrous sulfate-containing solutions
Assignee: Jones and Laughlin Steel Corp
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Filing: 1954-09-24
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Granted: 1958-07-29
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Expires: 1974-09-24
Abstract
No abstract record available.
Inventors
- 👤 Carl F Allison
- 👤 George M Dreher
- 👤 Charles A Trathowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:46
CPC Classifications
C; C01; C01G; C01G49/00; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS OF PRODUCING IRON-FREE AMMONIUM SULFATE FROM AN AQUEOUS SOLUTION OF FERROUS SULFATE OBTAINED FROM WASTE PICKLE LIQUOR COMPRISING ADDING TO SAID SOLUTION A MEMBER OF THE GROUP CONSISTING OF AMMONIUM CARBONATE, AMMONIUM BICARBONATE, AMMONIUM CARBAMATE, AND MIXTURES THEREOF WHEREBY SAID FERROUS SULFATE IS CONVERTED INTO FERROUS CARBONATE AND AMMONIUM SULFATE, THEN ADDING TO SAID SOLUTION A STRONG BASE, THEN HEATING SAID SOLUTION TO DRIVE OFF DISSOLVED CO2 THEREFROM, THE AMOUNT OF STRONG BASE BEING ADJUSTED TO BRING THE PH OF SAID SOLUTION AFTER REMOVAL OF DISSOLVED CO2 TO A VALUE NOT LESS THAN ABOUT 9, WHEREBY ALL SAID FERROUS CARBONATE IS PRECIPITATED, AND REMOVING SAID PRECIPITATED FERROUS CARBONATE.
Claim 2
Dependent Claim
110 words
THE PROCESS OF PRODUCING IRON-FREE AMMONIUM SULFATE FROM AN AQUEOUS SOLUTION OF FERROUS SULFATE OBTAINED FROM WASTE PICKLE LIQUOR COMPRISING ADDING TO SAID SOLUTION A MEMBER OF THE GROUP CONSISTING OF AMMONIUM CARBONATE, AMMONIUM BICARBONATE, AMMONIUM CARBAMATE, AND MIXTURES THEREOF WHEREBY SAID FERROUS SULFATE IS CONVERTED INTO FERROUS CARBONATE AND AMMONIUM SULFATE, THEN ADDING TO SAID SOLUTION A STRONG BASE, THEN HEATING SAID SOLUTION TO DRIVE OFF DISSOLVED CO2 THEREFROM, THE AMOUNT OF STRONG BASE BEING ADJUSTED TO BRING THE PH OF SAID SOLUTION AFTER REMOVAL OF DISSOLVED CO2 TO A VALUE NOT LESS THAN ABOUT 9, WHEREBY ALL SAID FERROUS CARBONATE IS PRECIPITATED, AND REMOVING SAID PRECIPITATED FERROUS CARBONATE.
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) | 1961-07-28 | 1962-01-27 | 1962-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-28 | 1966-01-27 | 1966-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-28 | 1970-01-27 | 1970-07-29 | $7700.00 | Window Closed / Lapsed |