Patent US5432845A successfully refreshed from Google Patents.
Patent US3357692A successfully refreshed from Google Patents.
US3357692A
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US
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Device for feeding additional materials into a stream of molten metals
Assignee: Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Filing: 1964-10-05
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Granted: 1967-12-12
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Expires: 1984-10-05
Abstract
No abstract record available.
Inventors
- 👤 Bakkerus Hermanus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:53
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/0037; C21C7/0043
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN COMBINATION WITH A CONTAINER FOR MOLTEN METALS, A DEVICE FOR FEEDING ADDITIVE MATERIALS INTO A STREAM OF THE MOLTEN METALS, WHICH ADDITIVE MATERIALS HAVE LOWER BOILING POINTS OR LOWER SPECIFIC WEIGHTS OR BOTH THAN THE MOLTEN METALS, SAID DEVICE COMPRISING, IN COMBINATION: MEANS DISPOSED IN THE BOTTOM OF SAID CONTAINER AND FORMING AN ANNULAR OUTLET CHANNEL FOR THE MOLTEN METAL STREAM, THE LOWERMOST PORTION OF SAID OUTLET CHANNEL FORMING AN ORIFICE, SAID OUTLET CHANNEL HAVING A TRANSVERSE CROSS SECTION WHICH NARROWS PROGRESSIVELY TOWARD THE UP TO SAID ORIFICE; AND MEANS FORMING A CYLINDRICAL FEEDING CHUTE FOR SAID ADDITIVE MATERIALS AND EXTENDING FROM WITHIN SAID CONTAINER SUBSTANTIALLY COAXIALLY THROUGH SAID OUTLET CHANNEL, SAID FEEDING CHUTE BEING MADE OF HEAT-RESISTANT MATERIAL AND EXTENDING PAST SAID ORIFICE TO TERMINATE IN A LOWER RIM.
Claim 2
Dependent Claim
131 words
IN COMBINATION WITH A CONTAINER FOR MOLTEN METALS, A DEVICE FOR FEEDING ADDITIVE MATERIALS INTO A STREAM OF THE MOLTEN METALS, WHICH ADDITIVE MATERIALS HAVE LOWER BOILING POINTS OR LOWER SPECIFIC WEIGHTS OR BOTH THAN THE MOLTEN METALS, SAID DEVICE COMPRISING, IN COMBINATION: MEANS DISPOSED IN THE BOTTOM OF SAID CONTAINER AND FORMING AN ANNULAR OUTLET CHANNEL FOR THE MOLTEN METAL STREAM, THE LOWERMOST PORTION OF SAID OUTLET CHANNEL FORMING AN ORIFICE, SAID OUTLET CHANNEL HAVING A TRANSVERSE CROSS SECTION WHICH NARROWS PROGRESSIVELY TOWARD THE UP TO SAID ORIFICE; AND MEANS FORMING A CYLINDRICAL FEEDING CHUTE FOR SAID ADDITIVE MATERIALS AND EXTENDING FROM WITHIN SAID CONTAINER SUBSTANTIALLY COAXIALLY THROUGH SAID OUTLET CHANNEL, SAID FEEDING CHUTE BEING MADE OF HEAT-RESISTANT MATERIAL AND EXTENDING PAST SAID ORIFICE TO TERMINATE IN A LOWER RIM.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |