Patent US2613137A successfully refreshed from Google Patents.
US2613137A
Expired / Lapsed
US
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Furnace for the recovery of metal oxides
Assignee: UNTERHARZER BERG und HUTTENWER
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Filing: 1949-09-08
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Granted: 1952-10-07
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Expires: 1969-09-08
Abstract
No abstract record available.
Inventors
- 👤 Hellwig Hans-Joachim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
C; C01; C01G; C01G1/00; C01G1/02; F; F27; F27B; F27B1/00; F27B1/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A FURNACE FOR THE RECOVERY OF VOLATILE METAL OXIDES, A WATER JACKET SURROUNDING SUBSTANTIALLY ONE-HALF OF THE BOTTOM PORTION OF THE FURNACE, A FEED OPENING IN A WALL OF THE FURNACE ABOVE SAID WATER JACKET, A CHUTE EXTENDING DOWNWARDLY TOWARDS SAID OPENING AND BEING INCLINED TO DIRECT THE CHARGE INTO THE PREHEATED ONE-HALF OF SAID BOTTOM PORTION, A SLIDE CLOSURE IN SAID OPENING OBOVE SAID CHUTE ADJUSTABLE TO CONTROL THE QUANTITY OF CHARGE FLOWING THROUGH SAID OPENING ON SAID CHUTE, THE TOP PORTION OF SAID FURNACE BEING ENLARGED TO FORM A CHAMBER FOR THE FLUE GASES, A HORIZONTAL DISCHARGE FLUE CONNECTED TO SAID ENLARGED TOP PORTION, A BOILER IN SAID DISCHARGE FLUE OF WHICH THE HORIZONTAL HEATING FLUES FREELY EXTEND INTO SAID ENLARGED TOP PORTION AND A VERTICAL COLLECTOR SHAFT FOR THE FLUE DUST ATTACHED TO THE BOTTOM PORTION OF SAID CHAMBER AND LOCATED BETWEEN THE LATTER AND THE BOILER.
Claim 2
Dependent Claim
151 words
IN A FURNACE FOR THE RECOVERY OF VOLATILE METAL OXIDES, A WATER JACKET SURROUNDING SUBSTANTIALLY ONE-HALF OF THE BOTTOM PORTION OF THE FURNACE, A FEED OPENING IN A WALL OF THE FURNACE ABOVE SAID WATER JACKET, A CHUTE EXTENDING DOWNWARDLY TOWARDS SAID OPENING AND BEING INCLINED TO DIRECT THE CHARGE INTO THE PREHEATED ONE-HALF OF SAID BOTTOM PORTION, A SLIDE CLOSURE IN SAID OPENING OBOVE SAID CHUTE ADJUSTABLE TO CONTROL THE QUANTITY OF CHARGE FLOWING THROUGH SAID OPENING ON SAID CHUTE, THE TOP PORTION OF SAID FURNACE BEING ENLARGED TO FORM A CHAMBER FOR THE FLUE GASES, A HORIZONTAL DISCHARGE FLUE CONNECTED TO SAID ENLARGED TOP PORTION, A BOILER IN SAID DISCHARGE FLUE OF WHICH THE HORIZONTAL HEATING FLUES FREELY EXTEND INTO SAID ENLARGED TOP PORTION AND A VERTICAL COLLECTOR SHAFT FOR THE FLUE DUST ATTACHED TO THE BOTTOM PORTION OF SAID CHAMBER AND LOCATED BETWEEN THE LATTER AND THE BOILER.
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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) | 1955-10-07 | 1956-04-07 | 1956-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-07 | 1960-04-07 | 1960-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-07 | 1964-04-07 | 1964-10-07 | $7700.00 | Window Closed / Lapsed |