US2576445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of vanadium values from an alkali metal vanadate solution
Assignee: NL Industries Inc
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Filing: 1949-10-11
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Granted: 1951-11-27
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Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 Cole Sandford Stoddard
- 👤 Breitenstein John Stuart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:57
CPC Classifications
C; C01; C01G; C01G31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
A PROCESS FOR THE RECOVERY OF VANADIUM VALUES FROM AN ALKALI METAL VANADATE SOLUTION HAVING A PH FROM 7.5 TO 8.5 WHICH COMPRISING TREATING SAID SOLUTION WITH CALCUIM CHLORIDE AND HYDRATED LIME AND PRECIPITATING AND SEPARATING A COMPLEX CALCIUM VANADATE COMPOSITION THEREFROM.
Claim 2
Dependent Claim
42 words
A PROCESS FOR THE RECOVERY OF VANADIUM VALUES FROM AN ALKALI METAL VANADATE SOLUTION HAVING A PH FROM 7.5 TO 8.5 WHICH COMPRISING TREATING SAID SOLUTION WITH CALCUIM CHLORIDE AND HYDRATED LIME AND PRECIPITATING AND SEPARATING A COMPLEX CALCIUM VANADATE COMPOSITION THEREFROM.
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) | 1954-11-26 | 1955-05-28 | 1955-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-26 | 1959-05-28 | 1959-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-26 | 1963-05-28 | 1963-11-27 | $7700.00 | Window Closed / Lapsed |