Patent US3600283A successfully refreshed from Google Patents.
US3600283A
Expired / Lapsed
US
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Ammonia stripper overhead control method
Assignee: Chevron USA Inc
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Filing: 1969-05-07
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Granted: 1971-08-17
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Expires: 1989-05-07
Abstract
Abstract METHOD FOR CONTROLLING AN AMMONIA DISTILLATION COLUMN USED TO STRIP AMMONIA FROM AN AQUEOUS SOLUTION CONTAINING AMMONIA WHICH COMPRISES: COOLING AND PARTIALLY CONDENSING OVERHEAD VAPORS FROM THE AMMONIA DISTILLATION COLUMN, RECEIVING THE PARTIALLY CONDENSED OVERHEAD FROM THE AMMONIA DISTILLATION COLUMN IN A REFLUX DRUM, CONTROLLING REFLUX TO THE DISTILLATION COLUMN RESPONSIVE TO TEMPERATURE IN THE OVERHEAD VAPOR LINE FROM THE AMMONIA DISTILLATION COLUMN, AND CONTROLLING THE OVERHEAD TEMPERATURE RESPONSIVE TO THE LIQUID LEVEL IN THE REFLUX DRUM.
Inventors
- 👤 Walter M Bollen
- 👤 William Leigh Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:15
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10; B; B01; B01D; B01D3/00; B01D3/42; B01D3/4211; B01D3/4227
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |