Patent US2992892A successfully refreshed from Google Patents.
US2992892A
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Process for precipitating a vanadium oxide product
Assignee: KERR MC GEE OIL IND Inc
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Filing: 1957-05-31
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Granted: 1961-07-18
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Expires: 1977-05-31
Abstract
No abstract record available.
Inventors
- 👤 Mayer B Goren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:36
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A CONTINUOUS PROCESS FOR THE PRECIPITATION OF A VANADIUM OXIDE PRODUCT COMPRISING PASSING A LIQUOR CONTAINING VANADIUM VALUES IN SOLUTION THROUGH A SERIES OF AT LEAST THREE PRIMARY REACTORS, THE LIQUOR HAVING A TEMPERATURE BETWEEN ABOUT 80*C. ATND THE BOILING POINT AND A PH OF ABOUT 0.5-1.7, THE VANADIUM CONTENT OF THE LIQUOR BEING SUBSTANTIALLY ALL IN THE PLUS 5 OXIDATION STATE WHILE WITHIN THE PRIMARY REACTORS, THE RESIDENCE TIME OF THE LIQUOR WITHIN EACH OF THE PRIMARY REACTORS BEING BETWEEN ABOUT THIRTY SECONDS AND THREE MINUTES WITH THE TOTAL RESIDENCE TIME OF THE LIQUOR WITHIN THE PRIMARY REACTORS BEING AT LEAST SIX MINUTES, AND PRECIPITATING VANADIUM OXIDE PRODUCT FROM THE LIQUOR WHILE PASSING THROUGH THE PRIMARY REACTORS.
Claim 2
Dependent Claim
118 words
A CONTINUOUS PROCESS FOR THE PRECIPITATION OF A VANADIUM OXIDE PRODUCT COMPRISING PASSING A LIQUOR CONTAINING VANADIUM VALUES IN SOLUTION THROUGH A SERIES OF AT LEAST THREE PRIMARY REACTORS, THE LIQUOR HAVING A TEMPERATURE BETWEEN ABOUT 80*C. ATND THE BOILING POINT AND A PH OF ABOUT 0.5-1.7, THE VANADIUM CONTENT OF THE LIQUOR BEING SUBSTANTIALLY ALL IN THE PLUS 5 OXIDATION STATE WHILE WITHIN THE PRIMARY REACTORS, THE RESIDENCE TIME OF THE LIQUOR WITHIN EACH OF THE PRIMARY REACTORS BEING BETWEEN ABOUT THIRTY SECONDS AND THREE MINUTES WITH THE TOTAL RESIDENCE TIME OF THE LIQUOR WITHIN THE PRIMARY REACTORS BEING AT LEAST SIX MINUTES, AND PRECIPITATING VANADIUM OXIDE PRODUCT FROM THE LIQUOR WHILE PASSING THROUGH THE PRIMARY REACTORS.
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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) | 1964-07-17 | 1965-01-16 | 1965-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-17 | 1969-01-16 | 1969-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-17 | 1973-01-16 | 1973-07-18 | $7700.00 | Window Closed / Lapsed |