US2548876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction furnace
Assignee: Brassert & Co
•
Filing: 1946-08-06
•
Granted: 1951-04-17
•
Expires: 1966-08-06
Abstract
No abstract record available.
Inventors
- 👤 Jahn Fredrik W De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:18
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/02; F; F27; F27B; F27B17/00; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US817414A
Cited
US1121559A
Cited
US1279181A
Cited
US1448340A
Cited
US1542966A
Cited
US1628012A
Cited
US1599885A
Cited
US1849658A
Cited
US1979729A
Cited
US2088165A
Cited
US2231760A
Cited
US2340346A
Cited
US2404944A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |