US2630309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal reverberatory furnace
Assignee: Individual
•
Filing: 1950-07-25
•
Granted: 1953-03-03
•
Expires: 1970-07-25
Abstract
No abstract record available.
Inventors
- 👤 Frederick C Ramsing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:10
CPC Classifications
F; F27; F27B; F27B3/00; F27B17/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1713543A
Cited
US1911379A
Cited
US1880012A
Cited
US2100907A
Cited
US2161180A
Cited
US2371213A
Cited
US2508629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |