US2889202A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of gases containing sulfur dioxide
Assignee: BASF SE
•
Filing: 1950-11-24
•
Granted: 1959-06-02
•
Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Johannsen Adolf
- 👤 Danz Willi
- 👤 Pfannmueller Wilhelm
- 👤 Wolf Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:08
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/48; C01B17/50; C01B17/52; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF GASES CONTAINING SULFUR DIOXIDE BY ROASTING A SULFIDIC ORE IN A REACTION LAYER CONSISTING OF BOTH ROASTED AND UNROASTED PARTICLES THROUGHLY WHICH AN OXYGEN-CONTAINING GAS IS PASSED UPWARDLY TO PRODUCE A RANDOM TURBULENT MOTION OF THE SOLID PARTICLES WITHIN THE CONFINES OF THE LAYER, THE STEPS WHICH COMPRISE MAINTAINING ROASTING CONDITIONS SUCH THAT THE LAYER CONSISTS PREDOMINANTLY OF ROASTED PARTICLES,
Claim 2
Dependent Claim
67 words
IN A PROCESS FOR THE PRODUCTION OF GASES CONTAINING SULFUR DIOXIDE BY ROASTING A SULFIDIC ORE IN A REACTION LAYER CONSISTING OF BOTH ROASTED AND UNROASTED PARTICLES THROUGHLY WHICH AN OXYGEN-CONTAINING GAS IS PASSED UPWARDLY TO PRODUCE A RANDOM TURBULENT MOTION OF THE SOLID PARTICLES WITHIN THE CONFINES OF THE LAYER, THE STEPS WHICH COMPRISE MAINTAINING ROASTING CONDITIONS SUCH THAT THE LAYER CONSISTS PREDOMINANTLY OF ROASTED PARTICLES,
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |