US3441379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting hydrogen sulfide into elementary sulfur
Assignee: IFP Energies nouvelles
•
Filing: 1966-03-30
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Granted: 1969-04-29
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Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Philippe Renault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:52
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/02; C01B17/04; C01B17/05; C10; C10K; C10K1/00; C10K1/08; C10K1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
CA703268A
Cited
DE564058C
Cited
US2028336A
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US2161663A
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US2490840A
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US2537655A
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US3050370A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-28 | 1972-10-28 | 1973-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-28 | 1976-10-28 | 1977-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-28 | 1980-10-28 | 1981-04-29 | $7700.00 | Window Closed / Lapsed |