Patent US2899277A successfully refreshed from Google Patents.
US2899277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
holowaty
Assignee: —
•
Filing: —
•
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
2026-11-09 02:50
CPC Classifications
C; C10; C10K; C10K1/00; C10K1/08; C10K1/10; C10K1/103; C01; C01C; C01C1/00; C01C1/02; C01C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
IN THE PROCESS OF RECOVERING AMMONIA FROM AN AMMONIA-CONTAINING GAS INCLUDING THE STEPS OF REACTING SAID GAS WITH AQUEOUS AMMONIUM BISULFATE LIQUOR IN A REACTION ZONE TO FROM AMMONIUM SULFATE, EFFECTING SEPARATION OF AMMONIUM SULFATE FROM SAID LIQUOR, RECYCLING SAID LIQUOR TO THE REACTION ZONE, THERMALLY DECOMPOSITING SAID AMMONIUM SULFATE IN A DECOMPOSITION ZONE TO FORM AMMONIA AND AMMONIUM BISULFATE, RECOVERING SAID AMMONIA, AND RETURNING SAID AMMONIUM BISULFATE FOR REUSE IN SAID REACTION ZONE; THE IMPROVEMENT WHICH COMPRISES WITHDRAWING FROM SAID REACTION ZONE A SLURRY OF AMMONIUM SULFATE CRYSTALS IN SAID LIQUOR, AND COMMINGLING MOLTEN AMMONIUM BISULFATE FROM SAID DECOMPOSITION ZONE WITH SAID SLURRY PRIOR TO SAID SEPARATION WHEREBY TO EFFECT PRECIPITATION OF ADDITIONAL AMMONIUM SULFATE CRYSTALS FROM SAID LIQUOR AND WHEREBY TO DISSOLVE THE AMMONIUM BISULFATE IN SAID LIQUOR FOR RETURN ZONE.
Claim 2
Dependent Claim
133 words
IN THE PROCESS OF RECOVERING AMMONIA FROM AN AMMONIA-CONTAINING GAS INCLUDING THE STEPS OF REACTING SAID GAS WITH AQUEOUS AMMONIUM BISULFATE LIQUOR IN A REACTION ZONE TO FROM AMMONIUM SULFATE, EFFECTING SEPARATION OF AMMONIUM SULFATE FROM SAID LIQUOR, RECYCLING SAID LIQUOR TO THE REACTION ZONE, THERMALLY DECOMPOSITING SAID AMMONIUM SULFATE IN A DECOMPOSITION ZONE TO FORM AMMONIA AND AMMONIUM BISULFATE, RECOVERING SAID AMMONIA, AND RETURNING SAID AMMONIUM BISULFATE FOR REUSE IN SAID REACTION ZONE; THE IMPROVEMENT WHICH COMPRISES WITHDRAWING FROM SAID REACTION ZONE A SLURRY OF AMMONIUM SULFATE CRYSTALS IN SAID LIQUOR, AND COMMINGLING MOLTEN AMMONIUM BISULFATE FROM SAID DECOMPOSITION ZONE WITH SAID SLURRY PRIOR TO SAID SEPARATION WHEREBY TO EFFECT PRECIPITATION OF ADDITIONAL AMMONIUM SULFATE CRYSTALS FROM SAID LIQUOR AND WHEREBY TO DISSOLVE THE AMMONIUM BISULFATE IN SAID LIQUOR FOR RETURN ZONE.
References Cited (Backward Citations)
US1065566A
Cited
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 |