Patent US2895800A successfully refreshed from Google Patents.
US2895800A
Expired / Lapsed
US
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Method of and apparatus for producing ammonium sulphate crystals
Assignee: Individual
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Filing: 1954-08-27
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Granted: 1959-07-21
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Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Otto Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:09
CPC Classifications
C; C01; C01F; C01F7/00; C01F7/68; C01F7/74; C01F7/76; C01F7/762; C01F7/765; C01C; C01C1/00; C01C1/02; C01C1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN PRODUCING AMMONIUM SULFATE BY THE LIQUOR AND CRYSTAL DISPERSION METHOD IN WHICH GAS HAVING A SMALL AMMONIA CONTENT IS PASSED THROUGH A SCRUBBING SPACE FROM A LOWER GAS INLET TO AN UPPER GAS OUTLET, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF SPRAYING A RELATIVELY SMALL PORTION OF ACIDULATED AMMONIUM SULFATE LIQUOR HAVING A RELATIVELY HIGH SULFURIC ACID CONTENT INTO THE UPPER PORTION OF SAID SPACE, SPRAYING A RELATIVELY LARGE PORTION OF ACIDULATED AMMONIUM SULFATE LIQUOR HAVING A RELATIVELY LOW SULFURIC ACID CONTENT UPWARD INTO THE LOWER PORTION OF SAID SPACE, AND COLLECTING LIQUOR SPRAYED INTO SAID UPPER PORTION OF SAID SCRUBBING SPACE IN AN
Claim 2
Dependent Claim
105 words
IN PRODUCING AMMONIUM SULFATE BY THE LIQUOR AND CRYSTAL DISPERSION METHOD IN WHICH GAS HAVING A SMALL AMMONIA CONTENT IS PASSED THROUGH A SCRUBBING SPACE FROM A LOWER GAS INLET TO AN UPPER GAS OUTLET, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF SPRAYING A RELATIVELY SMALL PORTION OF ACIDULATED AMMONIUM SULFATE LIQUOR HAVING A RELATIVELY HIGH SULFURIC ACID CONTENT INTO THE UPPER PORTION OF SAID SPACE, SPRAYING A RELATIVELY LARGE PORTION OF ACIDULATED AMMONIUM SULFATE LIQUOR HAVING A RELATIVELY LOW SULFURIC ACID CONTENT UPWARD INTO THE LOWER PORTION OF SAID SPACE, AND COLLECTING LIQUOR SPRAYED INTO SAID UPPER PORTION OF SAID SCRUBBING SPACE IN AN
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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |