Patent US2763918A successfully refreshed from Google Patents.
US2763918A
Expired / Lapsed
US
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Process of making a ferroalloying material and product obtained thereby
Assignee: Chromium Mining and Smelting Corp Ltd
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Filing: 1953-06-05
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Granted: 1956-09-25
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Expires: 1973-06-05
Abstract
No abstract record available.
Inventors
- 👤 Megill Henry Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:54
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/10; C22; C22C; C22C27/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A PROCESS FOR MAKING A THREE-METAL FURNACE ADDITIVE FOR USE IN MAKING STAINLESS STEELS WHICH COMPRISES REACTING IN THE SOLID STATE A MATERIAL CONTAINING A SUBSTANTIAL PROPORTION OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE AND COBALT OXIDE IN INTIMATE CONTACT WITH A FERROALLAY MATERIAL CONTAINING A SUBSTANTIAL AMOUNT OF CARBON SELECTED FROM FERROALLOYS OF THE GROUP CONSISTING OF FERROCHROMIUM, FERROMANGANESE, FERROTITANIUM, FERROMOLYBDENUM, FERROTUNGSTEN, FERROVANADIUM, FERROZIRCONIUM, FERROHAFNIUM, AND MIXTURES AND COMPOSITE ALLOYS THEROF BY HEATING SAID MATERIALS IN A CONFINED ZONE UNDER CONDITIONS OF LOW ABSOLUTE PRESSURE TO A TEMPERATURE BELOW THE POINT OF SUBSTANTIAL FUSION OF SAID MATERIALS AND FOR A TIME SUFFICIENT TO EFFECT REACTION BETWEEN THE METAL OXIDE-CONTAINING MATERIAL AND THE FERROALLOY WITH SUBSTANTIAL REDUCTION OF THE METAL OF THE METAL OXIDE TO THE METALLIC STATE AND SUBSTANTIAL OXIDATION OF THE CARBON OF THE FERROALLOY TO AN OXIDE OF CARBON, AND WITHDRAWING THE OXIDE OF CARBON FORMED IN THE REACTION FROM SAID CONFINED ZONE, WHEREBY TO YIELD A METALLIC RESIDUE LOW IN CARBON INCLUDING THE METAL OF THE METAL OXIDE-CONTAINING MATERIAL AND THE METALS OF THE FERROALLOY SUBSTANTIALLY ALL IN THE METALLIC STATE.
Claim 2
Dependent Claim
190 words
A PROCESS FOR MAKING A THREE-METAL FURNACE ADDITIVE FOR USE IN MAKING STAINLESS STEELS WHICH COMPRISES REACTING IN THE SOLID STATE A MATERIAL CONTAINING A SUBSTANTIAL PROPORTION OF A METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF NICKEL OXIDE AND COBALT OXIDE IN INTIMATE CONTACT WITH A FERROALLAY MATERIAL CONTAINING A SUBSTANTIAL AMOUNT OF CARBON SELECTED FROM FERROALLOYS OF THE GROUP CONSISTING OF FERROCHROMIUM, FERROMANGANESE, FERROTITANIUM, FERROMOLYBDENUM, FERROTUNGSTEN, FERROVANADIUM, FERROZIRCONIUM, FERROHAFNIUM, AND MIXTURES AND COMPOSITE ALLOYS THEROF BY HEATING SAID MATERIALS IN A CONFINED ZONE UNDER CONDITIONS OF LOW ABSOLUTE PRESSURE TO A TEMPERATURE BELOW THE POINT OF SUBSTANTIAL FUSION OF SAID MATERIALS AND FOR A TIME SUFFICIENT TO EFFECT REACTION BETWEEN THE METAL OXIDE-CONTAINING MATERIAL AND THE FERROALLOY WITH SUBSTANTIAL REDUCTION OF THE METAL OF THE METAL OXIDE TO THE METALLIC STATE AND SUBSTANTIAL OXIDATION OF THE CARBON OF THE FERROALLOY TO AN OXIDE OF CARBON, AND WITHDRAWING THE OXIDE OF CARBON FORMED IN THE REACTION FROM SAID CONFINED ZONE, WHEREBY TO YIELD A METALLIC RESIDUE LOW IN CARBON INCLUDING THE METAL OF THE METAL OXIDE-CONTAINING MATERIAL AND THE METALS OF THE FERROALLOY SUBSTANTIALLY ALL IN THE METALLIC STATE.
Claim 3
Dependent Claim
93 words
A FERROALLOYING FURNACE ADDITIVE IN THE FORM OF FINELY DIVIDED LARGELY UNFUSED PARTICLES EACH COMPRISING A METAL OF THE GROUP CONSISTING OF NICKEL AND COBALT AND MIXTURES THEREOF IN AMOUNTS RANGING FROM 20% TO 50%, A METAL OF THE GROUP CONSISTING OF CHROMIUM, MANGANESE, TITANIUM, MOLYDDENUM, TUNGSTEN, VANADIUM, ZIRCONIUM, HAFNIUM AND MIXTURES THEROF IN AMOUNTS RANGING FROM 25% TO 65%, CARBON IN AMOUNTS RANGING FROM 0.01% TO 0.15%, THE ALLOYING METAL CONTENT OF SAID AGGREGATE BEING GREATER THAN 45%, THE BALANCE BEING SUBSTANTIALLY ALL IRON EXCEPT FOR INCIDENTAL METALLIC AND METALLIC OXIDE CONSTITUENTS.
Claim 4
Dependent Claim
93 words
A FERROALLOYING FURNACE ADDITIVE IN THE FORM OF FINELY DIVIDED LARGELY UNFUSED PARTICLES EACH COMPRISING A METAL OF THE GROUP CONSISTING OF NICKEL AND COBALT AND MIXTURES THEREOF IN AMOUNTS RANGING FROM 20% TO 50%, A METAL OF THE GROUP CONSISTING OF CHROMIUM, MANGANESE, TITANIUM, MOLYDDENUM, TUNGSTEN, VANADIUM, ZIRCONIUM, HAFNIUM AND MIXTURES THEROF IN AMOUNTS RANGING FROM 25% TO 65%, CARBON IN AMOUNTS RANGING FROM 0.01% TO 0.15%, THE ALLOYING METAL CONTENT OF SAID AGGREGATE BEING GREATER THAN 45%, THE BALANCE BEING SUBSTANTIALLY ALL IRON EXCEPT FOR INCIDENTAL METALLIC AND METALLIC OXIDE CONSTITUENTS.
Claim 5
Independent Claim
43 words
THE METHOD OF INTRODUCING NICKEL INTO A STEEL MELT WHICH COMPRISES THE STEPS OF REACTING NICKEL OXIDE WITH FERROCHROMIUM HAVING A SUBSTANTIAL PERCENTAGE OF CARBON THEREIN TO PRODUCE AN IRON-CHROMIUM-NICKEL RESIDUE IN THE SOLID STATE, AND OF ADDING THIS RESIDUE TO MOLTEN STEEL.
Claim 6
Independent Claim
43 words
THE METHOD OF INTRODUCING NICKEL INTO A STEEL MELT WHICH COMPRISES THE STEPS OF REACTING NICKEL OXIDE WITH FERROCHROMIUM HAVING A SUBSTANTIAL PERCENTAGE OF CARBON THEREIN TO PRODUCE AN IRON-CHROMIUM-NICKEL RESIDUE IN THE SOLID STATE, AND OF ADDING THIS RESIDUE TO MOLTEN STEEL.
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |