US2614905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coagulating polyvanadic acid salts
Assignee: Diamond Shamrock Corp
•
Filing: 1949-11-01
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Granted: 1952-10-21
•
Expires: 1969-11-01
Abstract
No abstract record available.
Inventors
- 👤 Tom S Perrin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:53
CPC Classifications
C; C01; C01G; C01G31/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN THE METHOD OF COAGULATING SODIUM AND AMMONIUM ACID SALTS OF HEXAMETAVANADIC ACID, IN WHICH A SOLUTION CONTAINING A MIXTURE OF HYDROUS ACIDIC VANADIUM OXIDES AND HAVING A PH OF LESS THAN 1 IS NEUTRALIZED WITH A BASE OF THE CLASS OF SODIUM AND AMMONIUM BASES TO A PH WITHIN THE RANGE OF 1-3 TO PRECIPITATE A COAGULUM OF SALTS OF HEXAMETAVANADIC ACID, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF CONTACTING A BODY OF SAID SOLUTION PRIOR TO NEUTRALIZATION WITH A MASS OF LEAD PEROXIDE TO OXIDIZE REDUCED HYDROUS ACIDIC VANADIUM OXIDES IN SAID MIXTURE AND POLYMERIZE THE METAVANADIC ACID TO HEXAMETAVANADIC ACID, AND SEPARATING SAID SOLUTION FROM SAID MASS AND THE REDUCTION PRODUCT THEREOF.
Claim 2
Dependent Claim
115 words
IN THE METHOD OF COAGULATING SODIUM AND AMMONIUM ACID SALTS OF HEXAMETAVANADIC ACID, IN WHICH A SOLUTION CONTAINING A MIXTURE OF HYDROUS ACIDIC VANADIUM OXIDES AND HAVING A PH OF LESS THAN 1 IS NEUTRALIZED WITH A BASE OF THE CLASS OF SODIUM AND AMMONIUM BASES TO A PH WITHIN THE RANGE OF 1-3 TO PRECIPITATE A COAGULUM OF SALTS OF HEXAMETAVANADIC ACID, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF CONTACTING A BODY OF SAID SOLUTION PRIOR TO NEUTRALIZATION WITH A MASS OF LEAD PEROXIDE TO OXIDIZE REDUCED HYDROUS ACIDIC VANADIUM OXIDES IN SAID MIXTURE AND POLYMERIZE THE METAVANADIC ACID TO HEXAMETAVANADIC ACID, AND SEPARATING SAID SOLUTION FROM SAID MASS AND THE REDUCTION PRODUCT THEREOF.
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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) | 1955-10-21 | 1956-04-21 | 1956-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-21 | 1960-04-21 | 1960-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-21 | 1964-04-21 | 1964-10-21 | $7700.00 | Window Closed / Lapsed |