Patent US2976233A successfully refreshed from Google Patents.
US2976233A
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Removal of vanadium from petroleum oils by oxidation
Assignee: Wyeth Holdings LLC
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Filing: 1957-10-22
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Granted: 1961-03-21
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Expires: 1977-10-22
Abstract
No abstract record available.
Inventors
- 👤 Selbin Joel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:59
CPC Classifications
C; C10; C10G; C10G27/00; C10G27/04; C10G27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD OF REMOVING VANADIUM FROM PETROLEUM HYDROCARBON OILS CONTAINING VANADIUM COMBINED THEREIN AS A TETRAVELENT VANADIUM PORPHYRIN COMPLEX WHICH CONSISTS ESSENTIALLY IN THE STEPS OF OXIDIZING SAID VANADIUM TO THE PENTAVALENT CONDITION AND THEN SEPARATING IT FROM THE OIL.
Claim 2
Independent Claim
40 words
A METHOD OF REMOVING VANADIUM FROM PETROLEUM HYDROCARBON OILS CONTAINING VANADIUM COMBINED THEREIN AS A TETRAVELENT VANADIUM PORPHYRIN COMPLEX WHICH CONSISTS ESSENTIALLY IN THE STEPS OF OXIDIZING SAID VANADIUM TO THE PENTAVALENT CONDITION AND THEN SEPARATING IT FROM THE OIL.
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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) | 1964-03-20 | 1964-09-19 | 1965-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-20 | 1968-09-19 | 1969-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-20 | 1972-09-19 | 1973-03-21 | $7700.00 | Window Closed / Lapsed |