US3087786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of high purity vanadium pentoxide from oxidic vanadium materials
Assignee: Union Carbide Corp
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Filing: 1960-05-10
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Granted: 1963-04-30
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Expires: 1980-05-10
Abstract
No abstract record available.
Inventors
- 👤 William P Schoder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
C; C01; C01G; C01G31/00; C01G31/02; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
126 words
IN THE PRODUCTION OF VANDIUM PENTOXIDE FROM ALKALI POLYVANADATE, THE IMPROVEMENT WHICH COMPRISES FORMING AN AMMONIATED AQUEOUS SOLUTION OF SAID SELECTED MATERIAL; ADJUSTING THE PH OF SAID SOLUTION TO A VALUE BELOW ABOUT 2.1 BY THE ADDITION OF AN ACID WHICH FORMS WATER SOLUBLE SALTS OF THE ALKALI METAL VALUES AND TO FORM A HIGHLY PURE AMMONIUM HEXAVANDATE PRECIPITATE; EFFECTING A SEPARATION OF SAI PRECIPATE FROM THE RESULTING SOLUTION; HEATING SAID PRECIPATE UNDER OXIDIZING CONDITIONS TO A TEMPRATURE BETWEEN 190* C. AND 400* C., WHICH CONTINUOUSLY AGITATING TO EVOLVE AMMONIA GAS AND PRODUCE VANDIUM PENTOXIDE; FUSING THE RESULTING HIGHLY PURE VANADIUM PENTOXIDE BY HEATING TO A TEMPERATURE BETWEEN 670* C. AND 950* C.; AND QUICKLY COOLING THE FUSED MATERIAL TO PRODUCE A FLAKED VANADIUM PENTOXIDE PRODUCT.
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) | 1966-04-29 | 1966-10-29 | 1967-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-29 | 1970-10-29 | 1971-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-29 | 1974-10-29 | 1975-04-30 | $7700.00 | Window Closed / Lapsed |