US3431070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treating ammonia and hydrogen sulfide gases to produce ammonium thiosulfate and sulfur therefrom
Assignee: Union Oil Company of California
•
Filing: 1964-04-28
•
Granted: 1969-03-04
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Expires: 1984-04-28
Abstract
No abstract record available.
Inventors
- 👤 James L Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:09
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/64; C01B17/02; C01B17/04; C01B17/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1079291A
Cited
US1795121A
Cited
US1855856A
Cited
US1957265A
Cited
US2219258A
Cited
GB947640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-03 | 1972-09-02 | 1973-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-03 | 1976-09-02 | 1977-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-03 | 1980-09-02 | 1981-03-04 | $7700.00 | Window Closed / Lapsed |