Patent US3182985A successfully refreshed from Google Patents.
US3182985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making steel
Assignee: Beazer East Inc
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Filing: 1962-11-13
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Granted: 1965-05-11
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Richard F Obenchain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:26
CPC Classifications
C; C21; C21C; C21C5/00; C21C5/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
88 words
A METAL REFINING FURNACE COMPRISING A CHAMBER ADAPTED TO CONTAIN A BATH OF MOLTEN METAL WITH A SLAG LAYER, SAID SLAG LAYER AND METAL BATH AT THE PLACE OF CONTACT FORMING A SLAG-METAL INTERFACE, THE FRONT WALL AND BACK WALL OF SAID CHAMBER INCLINING UPWARDLY AND OUTWARDLY TO ABOVE THE TOP OF SAID SLAG LAYER, SAID WALLS SLOPING OUTWARDLY FROM SAID SLAG METAL INTERFACE TO ABOVE THE TOP OF SAID SLAG LAYER AT A PREDETERMINED ANGLE, AND SAID WALL HAVING A STEEPER SLOPE BELOW SAID SLAG METAL INTERFACE.
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) | 1968-05-10 | 1968-11-09 | 1969-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-05-10 | 1972-11-09 | 1973-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-05-10 | 1976-11-09 | 1977-05-11 | $7700.00 | Window Closed / Lapsed |