Patent US2970039A successfully refreshed from Google Patents.
US2970039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of ammonium sulfate
Assignee: Individual
•
Filing: 1955-03-31
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Granted: 1961-01-31
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Expires: 1975-03-31
Abstract
No abstract record available.
Inventors
- 👤 Vian-Ortuno Angel
- 👤 Crespi-Gonzalez Alicia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:53
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS OF PRODUCING AMMONIUM SULFATE FROM SULFUR DIOXIDE-CONTAINING GAS, COMPRISING THE STEPS OF PASSING SULFUR DIOXIDE-CONTAINING AS THROUGH A LIQUID ORGANIC BASE WEAKER THAN AMMONIA, THEREBY BINDING SAID SULFUR DIOXIDE TO SAID ORGANIC BASE; ADDING OXYGEN TO THE THUS-FORMED SULFITE OF SAID ORGANIC BASE SO AS TO SUBSTANTIALLY COMPLETELY OXIDIZE THE SAME TO THE SULFATE OF SAID ORGANIC BASE WITHOUT RETAINING ANY APPRECIABLE QUANTITY OF SAID SULFITE OF SAID ORGANIC BASE; TREATING SAID SULFATE OF SAID ORGANIC BASE WITH AMMONIA, THEREBY FREEING SAID BASE AND FORMING AMMONIUM SULFATE; AND RECOVERING THE THUS-FORMED AMMOMIUM SULFATE.
Claim 2
Dependent Claim
95 words
A PROCESS OF PRODUCING AMMONIUM SULFATE FROM SULFUR DIOXIDE-CONTAINING GAS, COMPRISING THE STEPS OF PASSING SULFUR DIOXIDE-CONTAINING AS THROUGH A LIQUID ORGANIC BASE WEAKER THAN AMMONIA, THEREBY BINDING SAID SULFUR DIOXIDE TO SAID ORGANIC BASE; ADDING OXYGEN TO THE THUS-FORMED SULFITE OF SAID ORGANIC BASE SO AS TO SUBSTANTIALLY COMPLETELY OXIDIZE THE SAME TO THE SULFATE OF SAID ORGANIC BASE WITHOUT RETAINING ANY APPRECIABLE QUANTITY OF SAID SULFITE OF SAID ORGANIC BASE; TREATING SAID SULFATE OF SAID ORGANIC BASE WITH AMMONIA, THEREBY FREEING SAID BASE AND FORMING AMMONIUM SULFATE; AND RECOVERING THE THUS-FORMED AMMOMIUM SULFATE.
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) | 1964-01-31 | 1964-08-01 | 1965-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-31 | 1968-08-01 | 1969-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-31 | 1972-08-01 | 1973-01-31 | $7700.00 | Window Closed / Lapsed |