Patent US589266A successfully refreshed from Google Patents.
Patent US2889218A successfully refreshed from Google Patents.
US2889218A
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Continuous process for metallothermic reactions
Assignee: Transition Metals and Chemicals Inc
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Filing: 1956-04-30
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Granted: 1959-06-02
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Expires: 1976-04-30
Abstract
No abstract record available.
Inventors
- 👤 Clarence F Hiskey
- 👤 Jean A Lamoureux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:45
CPC Classifications
C; C22; C22B; C22B5/00; C22B5/02; C22B5/04; C21; C21B; C21B15/00; C21B15/02; C22B5/06; Y; Y10; Y10S; Y10S75/00; Y10S75/959
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A METALLOTHERMIC PROCESS FOR REDUING METALLIC OXIDES IN A CONTINUOUS PROCESS, SAID PROCESS COMPRISING THE STEPS OF CONTINUOUSLY EXTRUDING A REACTION MIXTURE CONSISTING OF A REDUCING METAL AND A METALLIC OXIDE INTO A CRUCIBLE, REACTING THE REDUCING METAL AND THE METALLIC OXIDE THEREIN TO PRODUCE A MOLTEN METAL FROM THE METALLIC OXIDE AND TO FORM A MOLTEN SLAG, SEGREGATING THE MOLTEN SLAG AND MOLTEN METAL IN THE CRUCIBLE, THEN SEPARATING THE MOLTEN SLAG AND MOLTEN METAL WITHIN THE CRUCIBLE AND WITHDRAWING EACH AT SEPARATE PORTS SITUATED IN THE CRUCIBLE.
Claim 2
Dependent Claim
89 words
A METALLOTHERMIC PROCESS FOR REDUING METALLIC OXIDES IN A CONTINUOUS PROCESS, SAID PROCESS COMPRISING THE STEPS OF CONTINUOUSLY EXTRUDING A REACTION MIXTURE CONSISTING OF A REDUCING METAL AND A METALLIC OXIDE INTO A CRUCIBLE, REACTING THE REDUCING METAL AND THE METALLIC OXIDE THEREIN TO PRODUCE A MOLTEN METAL FROM THE METALLIC OXIDE AND TO FORM A MOLTEN SLAG, SEGREGATING THE MOLTEN SLAG AND MOLTEN METAL IN THE CRUCIBLE, THEN SEPARATING THE MOLTEN SLAG AND MOLTEN METAL WITHIN THE CRUCIBLE AND WITHDRAWING EACH AT SEPARATE PORTS SITUATED IN THE CRUCIBLE.
References Cited (Backward Citations)
US705727A
Cited
US802941A
Cited
US821189A
Cited
US1609970A
Cited
US1593660A
Cited
US1886937A
Cited
US2124262A
Cited
US2610911A
Cited
US2621916A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |