US3518166A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogen sulfide and ammonia recovery by degassing and plural distillation with ammonia recycle
Assignee: Chevron USA Inc
•
Filing: 1968-09-26
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Granted: 1970-06-30
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Expires: 1988-09-26
Abstract
No abstract record available.
Inventors
- 👤 Robert J Klett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:42
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/02; C01C1/10; C01B; C01B17/00; C01B17/16; C01B17/167
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3356608A
Cited
US3096156A
Cited
US3335071A
Cited
US3340182A
Cited
US3365393A
Cited
US3404072A
Cited
US3365374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-29 | 1973-12-29 | 1974-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-29 | 1977-12-29 | 1978-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-29 | 1981-12-29 | 1982-06-30 | $7700.00 | Window Closed / Lapsed |