Patent US3482464A successfully refreshed from Google Patents.
Patent US3013101A successfully refreshed from Google Patents.
Patent US2825628A successfully refreshed from Google Patents.
US2825628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of gases containing sulfur dioxide
Assignee: BASF SE
•
Filing: 1953-12-14
•
Granted: 1958-03-04
•
Expires: 1973-12-14
Abstract
No abstract record available.
Inventors
- 👤 Johannsen Adolf
- 👤 Danz Willi
- 👤 Klingler Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:25
CPC Classifications
C; C22; C22B; C22B1/00; C22B1/02; C22B1/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
IN A PROCESS FOR THE PRODUCTION OF SULFUR DIOXIDE CONTAINING GASES BY CONTINUOUSLY ROASTING FINELY-GRAINED SULFURIC ORE FLOTATION CONCENTRATE HAVING GRAIN SIZES PREDOMINANTLY BELOW ABOUT 0.2 MILLIMETER IN A FLUIDIZED LAYER OF PARTICLES MAINTAINED UNIFORMLY IN RANDOM TRUBULENT MOTION THEREIN BY MEANS OF THE OXYGEN-CONTAINING GAS NECESSARY FOR THE ROASTING AND THE ROASTER GAS FORMED, AND CONTINUOUSLY REMOVING THE CINDERS PRODUCED BY THE ROAST-
References Cited (Backward Citations)
US2733137A
Cited
US2343780A
Cited
US2637629A
Cited
US2563086A
Cited
US2621118A
Cited
US2591595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |