Patent US3062639A successfully refreshed from Google Patents.
US3062639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of iron-containing materials
Assignee: MW Kellogg Co
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Filing: 1959-07-21
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Granted: 1962-11-06
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Expires: 1979-07-21
Abstract
No abstract record available.
Inventors
- 👤 Sterling Edwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:42
CPC Classifications
C; C21; C21B; C21B13/00; C21B13/0033; Y; Y02; Y02P; Y02P10/00; Y02P10/10; Y02P10/134
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR TREATING A REDUCIBLE IRON OXIDE WHICH COMPRISES CONTACTING SAID OXIDE WITH AT LEAST ONE SOLUTION OF A MATERIAL COMPRISING AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL, AN ALKALINE EARTH METAL, A METAL OF GROUP V, A METAL OF GROUP VIB, BORON, AND SILICON TO DEPOSIT A SUBSTANTIALLY COMPLETE COATING OF SAID MATERIAL THEREON SUFFICIENT TO PREVENT AGGLOMERATION AND OF SUFFICIENT POROSITY TO PERMIT REDUCTION TO TAKE PLACE SEPARATELY, DRYING SAID THUS-DEPOSITED COATING, SEPARATELY PASSING A REDUCING GAS THROUGH SAID TREATED IRON OXIDE IN A REDUCTION ZONE UNDER FLUIDIZED CONDITIONS TO SUSPEND SAID TREATED IRON OXIDE IN SAID REDUCING GAS, AND MAINTAINING A TEMPERATURE IN SAID REDUCTON ZONE BETWEEN ABOUT 500*C. AND ABOUT 1535*C. SUCH THAT SAID IRON OXIDE IS SUBSTANTIALLY REDUCED.
Claim 2
Dependent Claim
128 words
A PROCESS FOR TREATING A REDUCIBLE IRON OXIDE WHICH COMPRISES CONTACTING SAID OXIDE WITH AT LEAST ONE SOLUTION OF A MATERIAL COMPRISING AN ELEMENT SELECTED FROM THE GROUP CONSISTING OF AN ALKALI METAL, AN ALKALINE EARTH METAL, A METAL OF GROUP V, A METAL OF GROUP VIB, BORON, AND SILICON TO DEPOSIT A SUBSTANTIALLY COMPLETE COATING OF SAID MATERIAL THEREON SUFFICIENT TO PREVENT AGGLOMERATION AND OF SUFFICIENT POROSITY TO PERMIT REDUCTION TO TAKE PLACE SEPARATELY, DRYING SAID THUS-DEPOSITED COATING, SEPARATELY PASSING A REDUCING GAS THROUGH SAID TREATED IRON OXIDE IN A REDUCTION ZONE UNDER FLUIDIZED CONDITIONS TO SUSPEND SAID TREATED IRON OXIDE IN SAID REDUCING GAS, AND MAINTAINING A TEMPERATURE IN SAID REDUCTON ZONE BETWEEN ABOUT 500*C. AND ABOUT 1535*C. SUCH THAT SAID IRON OXIDE IS SUBSTANTIALLY REDUCED.
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) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |