Patent US2561347A successfully refreshed from Google Patents.
US2561347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Charging top for cupola furnaces
Assignee: THEODORE G KENNARD
•
Filing: 1948-08-20
•
Granted: 1951-07-24
•
Expires: 1968-08-20
Abstract
No abstract record available.
Inventors
- 👤 John F Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:20
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/24; F; F27; F27B; F27B1/00; F27B1/10; F27B1/20
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE478532C
Cited
US951128A
Cited
US1010490A
Cited
US1371827A
Cited
US1888605A
Cited
US1872057A
Cited
US1847179A
Cited
US1884048A
Cited
US1996784A
Cited
US2014044A
Cited
US2194971A
Cited
US2215879A
Cited
US2338175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-23 | 1955-01-22 | 1955-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-23 | 1959-01-22 | 1959-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-23 | 1963-01-22 | 1963-07-24 | $7700.00 | Window Closed / Lapsed |