US2473681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of breaking up the charge in electric smelting furnaces
Assignee: Elektrokemisk AS
•
Filing: 1946-06-12
•
Granted: 1949-06-21
•
Expires: 1966-06-12
Abstract
No abstract record available.
Inventors
- 👤 Hansen Georg Marius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 03:13
CPC Classifications
F; F27; F27D; F27D11/00; H; H05; H05B; H05B3/00; H05B3/60
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US978137A
Cited
US861319A
Cited
US1422135A
Cited
US1797276A
Cited
US1778809A
Cited
US1833894A
Cited
US2133329A
Cited
US2301947A
Cited
US2423787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-06-20 | 1952-12-20 | 1953-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-06-20 | 1956-12-20 | 1957-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-06-20 | 1960-12-20 | 1961-06-21 | $7700.00 | Window Closed / Lapsed |