US2974014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of metallic ores
Assignee: Columbia Southern Chemical Corp
•
Filing: 1955-11-14
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Granted: 1961-03-07
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Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Howard H Hoekje
- 👤 Robert A Kearley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:27
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/10; C22B34/12; C22B34/1204; C22B34/1209; C22B3/00; C22B3/04; C22B3/12; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF SEPARATING OXIDES OF ELEMENTS FORMING SOLID OXIDES WHICH COMPRISES CONTACTING WITH FUSED ALKALI METAL HYDROXIDE A COMPOSITION COMPRISING OXIDES OF ELEMENTS IN SOLID STATE, ONE OF THE OXIDES BEING SOLUBLE AND ONE BEING INSOLUBLE IN THE FUSED ALKALI METAL HYDROXIDE, WITHOUT SUBSTANTIAL REDUCTION OF THE INSOLUBLE OXIDE TO ELEMENTAL STATE TO FORM A COMPOSITION HAVING A LIQUID COMPONENT RICH IN AN ELEMENT OF AN OXIDE SOLUBLE IN FUSED ALKALI METAL HYDROXIDE AND A SOLID COMPONENT RICH IN AND OXIDE INSOLUBLE IN THE FUSED ALKALI METAL HYDROXIDE, AND SEPARATING SOLID COMPONENT RICH IN AN OXIDE INSOLUBLE IN FUSED ALKALI METAL HYDROXIDE FROM LIQUID PHASE COMPONENT.
Claim 2
Independent Claim
107 words
A METHOD OF SEPARATING OXIDES OF ELEMENTS FORMING SOLID OXIDES WHICH COMPRISES CONTACTING WITH FUSED ALKALI METAL HYDROXIDE A COMPOSITION COMPRISING OXIDES OF ELEMENTS IN SOLID STATE, ONE OF THE OXIDES BEING SOLUBLE AND ONE BEING INSOLUBLE IN THE FUSED ALKALI METAL HYDROXIDE, WITHOUT SUBSTANTIAL REDUCTION OF THE INSOLUBLE OXIDE TO ELEMENTAL STATE TO FORM A COMPOSITION HAVING A LIQUID COMPONENT RICH IN AN ELEMENT OF AN OXIDE SOLUBLE IN FUSED ALKALI METAL HYDROXIDE AND A SOLID COMPONENT RICH IN AND OXIDE INSOLUBLE IN THE FUSED ALKALI METAL HYDROXIDE, AND SEPARATING SOLID COMPONENT RICH IN AN OXIDE INSOLUBLE IN FUSED ALKALI METAL HYDROXIDE FROM LIQUID PHASE COMPONENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |