US2781245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering ammonia from ammoniacal liquors
Assignee: Honeywell International Inc
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Filing: 1952-09-18
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Granted: 1957-02-12
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Expires: 1972-09-18
Abstract
No abstract record available.
Inventors
- 👤 Harold E Robertson
- 👤 Barney O Strom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:34
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN THE PROCESS OF RECOVERING AMMONIA FROM AN AQUEOUS AMMONIACAL BRINE WHEREIN THE BRINE IS TREATED WITH LIME TO DECOMPOSE AMMONIUM COMPOUNDS IN THE BRINE, SAID LIME COMPRISING COARSER PARTICLES COMPRISING LIME ASSOCIATED WITH IMPURITIES AND FINER LIME PARTICLES AND HAVING BEEN OBTAINED FROM LIMESTONE BY CALCINATION THEREOF, THE IMPROVEMENT WHICH COMPRISES SEPARATING THE COARSER PARTICLES FROM THE REMAINING LIME, REACTING THE SEPARATED COARSER PARTICLES WITH AN AMMONIACAL BRINE CONTAINING AT LEAST 5 GRAMS OF AMMONIUM COMPOUNDS PER LITER OF BRINE, THE PROPORTION OF AMMONIACAL BRINE TO THE COARSER PARTICLES OF LIME BEING AT LEAST SUFFICIENT TO PROVIDE A CONSIDERABLE EXCESS OF AMMONIUM COMPOUNDS, AND THEN REACTING THE RESULTING BRINE WITH THE REMAINING LIME.
Claim 2
Dependent Claim
114 words
IN THE PROCESS OF RECOVERING AMMONIA FROM AN AQUEOUS AMMONIACAL BRINE WHEREIN THE BRINE IS TREATED WITH LIME TO DECOMPOSE AMMONIUM COMPOUNDS IN THE BRINE, SAID LIME COMPRISING COARSER PARTICLES COMPRISING LIME ASSOCIATED WITH IMPURITIES AND FINER LIME PARTICLES AND HAVING BEEN OBTAINED FROM LIMESTONE BY CALCINATION THEREOF, THE IMPROVEMENT WHICH COMPRISES SEPARATING THE COARSER PARTICLES FROM THE REMAINING LIME, REACTING THE SEPARATED COARSER PARTICLES WITH AN AMMONIACAL BRINE CONTAINING AT LEAST 5 GRAMS OF AMMONIUM COMPOUNDS PER LITER OF BRINE, THE PROPORTION OF AMMONIACAL BRINE TO THE COARSER PARTICLES OF LIME BEING AT LEAST SUFFICIENT TO PROVIDE A CONSIDERABLE EXCESS OF AMMONIUM COMPOUNDS, AND THEN REACTING THE RESULTING BRINE WITH THE REMAINING LIME.
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) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |