Patent US2578748A successfully refreshed from Google Patents.
US2578748A
Expired / Lapsed
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Recovery of metallic oxides such as zirconia
Assignee: Sylvester and Co
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Filing: 1946-03-25
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Granted: 1951-12-18
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Expires: 1966-03-25
Abstract
No abstract record available.
Inventors
- 👤 Robert A Schoenlaub
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:09
CPC Classifications
C; C01; C01G; C01G25/00; C01G25/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR RECOVERING ZIRCONIUM IN THE FORM OF ZIRCONIUM OXIDE FROM A SUBSTANCE CONTAINING A SILICIOUS COMPOUND OF THE METAL WHICH COMPRISES FORMING A HETEROGENEOUS SYSTEM OF DISCRETE CRYSTALS OF ZIRCONIUM OXIDE AND A CRYSTALLINE SILICATE GANGUE SUBSTANTIALLY FREE OF SUCH OXIDE BY HEATING AND REACTING SAID MATERIAL AT A TEMPERATURE BELOW ABOUT 3200* F. WITH AN ADDED BASIC MATERIAL IN SUCH AN AMOUNT THAT THE BASIC FUNCTIONING OXIDES AND ACID FUNCTIONING OXIDES ARE PRESENT IN RATIOS OF BETWEEN 1:1 AND 2:1 AND WHICH BASIC MATERIASL IS OF SUCH TYPE THAT UPON REACTION WITH SILICA IN THE STATED PROPORTIONS WILL PRODUCE PREPONDERANTLY SOLUBLE ORTHO-SILLICATES THUS SETTING FREE THE ZIRCONIUM OXIDE AS SUCH IN CRYSTAL GRAINS AND FORMING A FRIABLE SILICATE GANGUE, AND AFTER DISINTEGRATING THE MASS, SEPARATING THE ORTHO-SILICATE THUS FORMED FROM THE ZIRCONIUM OXIDE GRAINS.
Claim 2
Dependent Claim
137 words
A PROCESS FOR RECOVERING ZIRCONIUM IN THE FORM OF ZIRCONIUM OXIDE FROM A SUBSTANCE CONTAINING A SILICIOUS COMPOUND OF THE METAL WHICH COMPRISES FORMING A HETEROGENEOUS SYSTEM OF DISCRETE CRYSTALS OF ZIRCONIUM OXIDE AND A CRYSTALLINE SILICATE GANGUE SUBSTANTIALLY FREE OF SUCH OXIDE BY HEATING AND REACTING SAID MATERIAL AT A TEMPERATURE BELOW ABOUT 3200* F. WITH AN ADDED BASIC MATERIAL IN SUCH AN AMOUNT THAT THE BASIC FUNCTIONING OXIDES AND ACID FUNCTIONING OXIDES ARE PRESENT IN RATIOS OF BETWEEN 1:1 AND 2:1 AND WHICH BASIC MATERIASL IS OF SUCH TYPE THAT UPON REACTION WITH SILICA IN THE STATED PROPORTIONS WILL PRODUCE PREPONDERANTLY SOLUBLE ORTHO-SILLICATES THUS SETTING FREE THE ZIRCONIUM OXIDE AS SUCH IN CRYSTAL GRAINS AND FORMING A FRIABLE SILICATE GANGUE, AND AFTER DISINTEGRATING THE MASS, SEPARATING THE ORTHO-SILICATE THUS FORMED FROM THE ZIRCONIUM OXIDE GRAINS.
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) | 1954-12-17 | 1955-06-18 | 1955-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-17 | 1959-06-18 | 1959-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-17 | 1963-06-18 | 1963-12-18 | $7700.00 | Window Closed / Lapsed |