US2581752A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making ammonium sulfite
Assignee: R T COLLIER Corp
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Filing: 1947-08-04
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Granted: 1952-01-08
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Expires: 1967-08-04
Abstract
No abstract record available.
Inventors
- 👤 Robert T Collier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:48
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF PRODUCING AMMONIUM SULFITE, INCLUDING THE STEPS OF: CONTINUOUSLY INTRODUCING AMMONIA INTO A BODY OF WATER AT A LEVEL BELOW THE TOP SURFACE THEREOF FOR UPWARD DISPERSION TO CREATE AN ALKALINE ZONE IN THE BODY OF WATER; CONTINUOUSLY INTRODUCING SULFUR DIOXIDE INTO SAID BODY OF WATER ABOVE SAID LEVEL IN SAID ZONE TO REACT WITH THE DISPERSED AMMONIA TO FORM AMMONIUM SULFITE; CONTINUALLY ADDING WATER TO SAID BODY; AND CONTINUALLY DRAWING WATER FROM SAID BODY CONTAINING THE AMMONIUM SULFITE IN SOLUTION.
Claim 2
Independent Claim
83 words
A METHOD OF PRODUCING AMMONIUM SULFITE, INCLUDING THE STEPS OF: CONTINUOUSLY INTRODUCING AMMONIA INTO A BODY OF WATER AT A LEVEL BELOW THE TOP SURFACE THEREOF FOR UPWARD DISPERSION TO CREATE AN ALKALINE ZONE IN THE BODY OF WATER; CONTINUOUSLY INTRODUCING SULFUR DIOXIDE INTO SAID BODY OF WATER ABOVE SAID LEVEL IN SAID ZONE TO REACT WITH THE DISPERSED AMMONIA TO FORM AMMONIUM SULFITE; CONTINUALLY ADDING WATER TO SAID BODY; AND CONTINUALLY DRAWING WATER FROM SAID BODY CONTAINING THE AMMONIUM SULFITE IN SOLUTION.
References Cited (Backward Citations)
US2004799A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |