Patent US2899274A successfully refreshed from Google Patents.
US2899274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of ammonia and hydrogen
Assignee: —
•
Filing: —
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Granted: 1959-08-11
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Expires: 1976-08-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:42
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12; C01C3/00; C01C3/02; C01C3/0208; C01C3/0229; C01C3/0233; C01C3/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROCESS FOR SEPARATING AND RECOVERING AMMONIA AND HCN FROM A GASEOUS MIXTURE CONTAINING THE SAME, THE STEPS WHICH COMPRISES CONTACTING A STREAM OF SAID GASEOUS MIXTURE WITH AN ACIDIC SOLUTION CONTAINING ESSENTIALLY A SATURATED FATTY ACID CONTAINING FROM TWO TO THREE CARBON ATOMS, WATER AND THE AMMONIUM SALT OF SAID FATTY ACID, THE AMOUNT OF SAID ACID BEING IN STOICHIOMETRIC EXCESS BASED ON THE AMMONIA IN THE GAS STREAM, STRIPPING ALL OF THE HNC FROM THE ACIDIC SOLUTION UNDER CONDITIONS WHICH WILL NOT CRACK THE AMMONIUM SALT OF SAID ACID, SUCH CONDITIONS COMPRISING A TEMPERATURE NOT EXCEEDING ABOUT 100*C. AND A PRESSURE AT LEAST EQUAL TO ABOUT ATMOSPHERIC PRESSURE, AND SUBJECTING THE ACIDIC SOLUTION TO SUCH CONDITIONS OF TEMPERATURE AND PRESSURE AS WILL CRACK THE AMMONIUM SALT AND THUS RECOVER THE AMMONIUM THEREFROM.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR SEPARATING AND RECOVERING AMMONIA AND HCN FROM A GASEOUS MIXTURE CONTAINING THE SAME, THE STEPS WHICH COMPRISES CONTACTING A STREAM OF SAID GASEOUS MIXTURE WITH AN ACIDIC SOLUTION CONTAINING ESSENTIALLY A SATURATED FATTY ACID CONTAINING FROM TWO TO THREE CARBON ATOMS, WATER AND THE AMMONIUM SALT OF SAID FATTY ACID, THE AMOUNT OF SAID ACID BEING IN STOICHIOMETRIC EXCESS BASED ON THE AMMONIA IN THE GAS STREAM, STRIPPING ALL OF THE HNC FROM THE ACIDIC SOLUTION UNDER CONDITIONS WHICH WILL NOT CRACK THE AMMONIUM SALT OF SAID ACID, SUCH CONDITIONS COMPRISING A TEMPERATURE NOT EXCEEDING ABOUT 100*C. AND A PRESSURE AT LEAST EQUAL TO ABOUT ATMOSPHERIC PRESSURE, AND SUBJECTING THE ACIDIC SOLUTION TO SUCH CONDITIONS OF TEMPERATURE AND PRESSURE AS WILL CRACK THE AMMONIUM SALT AND THUS RECOVER THE AMMONIUM THEREFROM.
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) | 1962-08-10 | 1963-02-09 | 1963-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-10 | 1967-02-09 | 1967-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-10 | 1971-02-09 | 1971-08-11 | $7700.00 | Window Closed / Lapsed |