US2801152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of recovering tungstic oxide substantially free of molybdenum compounds
Assignee: Individual
•
Filing: 1953-06-23
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Granted: 1957-07-30
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Expires: 1973-06-23
Abstract
No abstract record available.
Inventors
- 👤 Kasey John Bryant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:42
CPC Classifications
C; C22; C22B; C22B34/00; C22B34/30; C22B34/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
THE PROCESS OF RECOVERING TUNGSTIC OXIDE OF HIGH PURITY SUBSTANTIALLY FREE OF A MOLYBDENUM COMPONENT AND OTHER CONTAMINANTS FROM A MINERAL MATERIAL CONTAINING A TUNGSTEN COMPOUND AND OTHER MINERAL CONSTITUENTS INCLUDING A MOLYBDENUM COMPOUND ISOMORPHIC WITH SAID TUGSTEN COMPOUND,COMPRISING DECOMPOSING SAID MATERIAL WITH AT LEAST APPROXIMATELY 20CC.''S BY VOLUME OF CONCENTRATED HYDROCHLORIC ACID FOR EACH GRAM OF TUNGSTEN PRESENT EXPESSED AS TUNGSTIC OXIDE, WO3, SAID HYDROCHLORIC ACID SOLUTION BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 60* C. AND BELOW 70* C., THE TUNGSTEN AND MOLYBDENUM COMPOUNDS BEING SUBSTANTIALLY COMPLETELY MAINTAINED IN SOLUTION DURING TREATMENT PERIOD TOGETHER WITH ANY ACID SOLUBLE IMPURITIES DERIVED FROM THE MATERIAL TREATED, THE HYDROCHLORIC ACID SOLUTION BEING MAINTAINED DURING THE TREATMENT PERIOD IN ITS CONCENTRATED STATE, SEPARATING THE RESULTING SOLUTION CONTAINING THE TUNGSTEN COMPOUND AND THE MOLYBDENUM COMPOUND, AND ANY ACID-SOLUBLE IMPURITIES, HEATING THE SEPARATED CONCENTRATED HYDROCHLORIC ACID SOLUTION CONTAINING TUNGSTEN AND MOLYBDENUM COMPOUNDS ABOVE TEMPERATURE OF 70* C. AND THEREBY PRECIPITATING THE TUNGSTEN-CONTENT OF SAID SOLUTION AS ACID-INSOLUBLE YELLOW TUNGSTIC OXIDE WHILE KEEPING THE MOLYBDENUM COMPOUND AND ANY IMPURITIES IN SOLUTION, AND RECOVERING THE PRECIPITATED TUNGSTIC OXIDE FROM THE SO-TREATED SOLUTION.
Claim 2
Dependent Claim
186 words
THE PROCESS OF RECOVERING TUNGSTIC OXIDE OF HIGH PURITY SUBSTANTIALLY FREE OF A MOLYBDENUM COMPONENT AND OTHER CONTAMINANTS FROM A MINERAL MATERIAL CONTAINING A TUNGSTEN COMPOUND AND OTHER MINERAL CONSTITUENTS INCLUDING A MOLYBDENUM COMPOUND ISOMORPHIC WITH SAID TUGSTEN COMPOUND,COMPRISING DECOMPOSING SAID MATERIAL WITH AT LEAST APPROXIMATELY 20CC.''S BY VOLUME OF CONCENTRATED HYDROCHLORIC ACID FOR EACH GRAM OF TUNGSTEN PRESENT EXPESSED AS TUNGSTIC OXIDE, WO3, SAID HYDROCHLORIC ACID SOLUTION BEING MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 60* C. AND BELOW 70* C., THE TUNGSTEN AND MOLYBDENUM COMPOUNDS BEING SUBSTANTIALLY COMPLETELY MAINTAINED IN SOLUTION DURING TREATMENT PERIOD TOGETHER WITH ANY ACID SOLUBLE IMPURITIES DERIVED FROM THE MATERIAL TREATED, THE HYDROCHLORIC ACID SOLUTION BEING MAINTAINED DURING THE TREATMENT PERIOD IN ITS CONCENTRATED STATE, SEPARATING THE RESULTING SOLUTION CONTAINING THE TUNGSTEN COMPOUND AND THE MOLYBDENUM COMPOUND, AND ANY ACID-SOLUBLE IMPURITIES, HEATING THE SEPARATED CONCENTRATED HYDROCHLORIC ACID SOLUTION CONTAINING TUNGSTEN AND MOLYBDENUM COMPOUNDS ABOVE TEMPERATURE OF 70* C. AND THEREBY PRECIPITATING THE TUNGSTEN-CONTENT OF SAID SOLUTION AS ACID-INSOLUBLE YELLOW TUNGSTIC OXIDE WHILE KEEPING THE MOLYBDENUM COMPOUND AND ANY IMPURITIES IN SOLUTION, AND RECOVERING THE PRECIPITATED TUNGSTIC OXIDE FROM THE SO-TREATED SOLUTION.
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |