US2654589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction and operation of vertical shaft furnaces
Assignee: Individual
•
Filing: 1949-11-16
•
Granted: 1953-10-06
•
Expires: 1969-11-16
Abstract
No abstract record available.
Inventors
- 👤 Somogyi Francis Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:26
CPC Classifications
F; F27; F27B; F27B1/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US507204A
Cited
US1832552A
Cited
US1992704A
Cited
GB487256A
Cited
US2245664A
Cited
US2199384A
Cited
US2345067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |