US2900285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for cleaning the chambers of regenerative furnaces
Assignee: Vodafone GmbH
•
Filing: 1956-10-04
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Granted: 1959-08-18
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Expires: 1976-10-04
Abstract
No abstract record available.
Inventors
- 👤 Darmann Otto
- 👤 Kobusch Helmut
- 👤 Speith Karl Georg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:24
CPC Classifications
F; F27; F27B; F27B3/00; F27B3/10; F27B3/26; F27B3/263
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR CLEANING THE AIR CHAMBERS OF A SIEMENS-MARTIN REGENERATIVE FURNACE WHICH HAS AIR CHAMBERS IN ADDITION TO GAS CHAMBERS, WHICH COMPRISES INTRODUCING BLAST FURNACE GAS INTO THE AIR CHAMBERS WHILE EXCLUDING THE ADMISSION OF AIR, AND THEN IMMEDIATELY REMOVING THE GAS THROUGH A CHIMNEY.
Claim 2
Dependent Claim
46 words
A PROCESS FOR CLEANING THE AIR CHAMBERS OF A SIEMENS-MARTIN REGENERATIVE FURNACE WHICH HAS AIR CHAMBERS IN ADDITION TO GAS CHAMBERS, WHICH COMPRISES INTRODUCING BLAST FURNACE GAS INTO THE AIR CHAMBERS WHILE EXCLUDING THE ADMISSION OF AIR, AND THEN IMMEDIATELY REMOVING THE GAS THROUGH A CHIMNEY.
References Cited (Backward Citations)
US2288980A
Cited
US2619434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |