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
2026-11-05 01:59
CPC Classifications
C; C21; C21B; C21B7/00; C21B7/24; F; F27; F27B; F27B1/00; F27B1/10; F27B1/20
Claims Analysis
Total Claims: 0
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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 |