Patent US2803533A successfully refreshed from Google Patents.
US2803533A
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US
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Method of injecting fluidized powders for metallurgical treatment
Assignee: Union Carbide Corp
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Filing: 1954-05-03
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Granted: 1957-08-20
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Expires: 1974-05-03
Abstract
No abstract record available.
Inventors
- 👤 Chester E Bieniosek
- 👤 Jr Homer C Barnes
- 👤 Dahm George Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:09
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/02; C21C5/00; C21C5/52; C21C5/5211; C21C5/5217; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A METHOD FOR FLUIDIZING SOLID POWDER AND INJECTING THE RESULTANT FLUIDIZED POWDER STREAM INTO MOLTEN METALS FOR THE METALLURGICAL TREATMENT THEREOF COMPRISING, MAINTAINING SAID SOLID POWDER IN A CLOSED CONTAINER UNDER A CONTROLLABLE REGULATED PRESSURE OF INERT GAS; FEEDING SAID POWDER, UNDER SAID REGULATED PRESSURE, INTO A STREAM OF DUCING SAID FLUIDIZED STREAM OF SAID POWDER INTO SAID MOLTEN METAL TO BE TREATED THROUGH AN INJECTION TUBE PARTIALLY IMMERSED THEREIN; AND CORRELATING THE VALUE OF SAID CONTROLLABLE REGULATED PRESSURE WITH THE POWDER FEED RATE DESIRED TO SAID FLUIDIZED POWDER STREAM WHILE MAINTAINING THE PRESSURE IN SAID INJECTION TUBE AT A VALUE AT LEAST GREATER THAN THAT REQUIRED TO PREVENT MOLTEN METAL FROM RISING WITHIN SAID PARTIALLY IMMERSED INJECTION TUBE.
Claim 2
Independent Claim
119 words
A METHOD FOR FLUIDIZING SOLID POWDER AND INJECTING THE RESULTANT FLUIDIZED POWDER STREAM INTO MOLTEN METALS FOR THE METALLURGICAL TREATMENT THEREOF COMPRISING, MAINTAINING SAID SOLID POWDER IN A CLOSED CONTAINER UNDER A CONTROLLABLE REGULATED PRESSURE OF INERT GAS; FEEDING SAID POWDER, UNDER SAID REGULATED PRESSURE, INTO A STREAM OF DUCING SAID FLUIDIZED STREAM OF SAID POWDER INTO SAID MOLTEN METAL TO BE TREATED THROUGH AN INJECTION TUBE PARTIALLY IMMERSED THEREIN; AND CORRELATING THE VALUE OF SAID CONTROLLABLE REGULATED PRESSURE WITH THE POWDER FEED RATE DESIRED TO SAID FLUIDIZED POWDER STREAM WHILE MAINTAINING THE PRESSURE IN SAID INJECTION TUBE AT A VALUE AT LEAST GREATER THAN THAT REQUIRED TO PREVENT MOLTEN METAL FROM RISING WITHIN SAID PARTIALLY IMMERSED INJECTION TUBE.
References Cited (Backward Citations)
US1587600A
Cited
US1968917A
Cited
US2181095A
Cited
US2502259A
Cited
GB622419A
Cited
US2485760A
Cited
US2577837A
Cited
US2577764A
Cited
US2692196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |