US2618548A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closed top side door
Assignee: THEODORE G KENNARD
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Filing: 1949-12-05
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Granted: 1952-11-18
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Expires: 1969-12-05
Abstract
No abstract record available.
Inventors
- 👤 John F Drake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:17
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/10; F27B1/18; Y; Y10; Y10S; Y10S266/00; Y10S266/90
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
THE METHOD OF OPERATING AN IRON MELTING CUPOLA HAVING AN INTERMITTENTLY OPENED CHARGING DOOR TO MINIMIZE THE TEMPERATURE AND VOLUME OF THE OUTGOING GASES COMPRISING BLOWING SECONDARY COMBUSTION AIR INTO THE FEEDING ZONE OF THE CUPOLA ABOVE THE MELTING ZONE AND ABOVE THE TOP OF THE CHARGE IN THE CUPOLA IN QUANTITIES SUFFICIENT TO BURN ANY EXCESS CARBON MONOXIDE; COLLECTING THE GASES IN THE PORTION OF SAID CUPOLA ABOVE THE CHARGE; AND APPLYING SUCTION TO THE TOP PORTION OF SAID CUPOLA WHEN SAID CHARGING DOOR IS OPENED.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |