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US3404072A
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Ammonia recovery from an acid gas in a plural stage, controlled distillation system
Assignee: Chevron USA Inc
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Filing: 1966-10-19
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Granted: 1968-10-01
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Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Walter M Bollen
- 👤 William L Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:48
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2106734A
Cited
US2519451A
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US3002818A
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US3054726A
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US3208230A
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US3272722A
Cited
US3321380A
Cited
US3322650A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |