US2710799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of platinum from alumina base platinum catalyst
Assignee: Universal Polychem Co
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Filing: 1953-08-11
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Granted: 1955-06-14
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Expires: 1973-08-11
Abstract
No abstract record available.
Inventors
- 👤 Leopard James Glenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:35
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A METHOD OF RECOVERING PLATINUM FROM A PLATINUM REFRACTORY METAL OXIDE COMPOSITE WHICH COMPRISES TREATING SAID COMPOSITE WITH A REAGENT AND FORMING A SOLUBLE COMPOUND OF A PORTION OF SAID REFRACTORY METAL OXIDE, DISSOLVING SAID SOLUBLE COMPOUND PROVIDING THEREBY A SOLUTION OF SAID SOLUBLE COMPOUND, SEPARATING PLATINUM AND UNDISSOLVED REFRACTORY METAL OXIDE IN A SOLID FORM FROM SAID SOLUTION, TREATING THE THUS SEPARATED SOLID MATERIAL WITH A STRONG BASE AND FORMING A SOLUBLE COMPOUND OF REMAINING REFRACTORY METAL OXIDE, DISSOLVING SAID LAST MENTIONED SOLUBLE COMPOUND AND SEPARATING PLATINUM IN A SOLID FROM THE SOLUTION.
Claim 2
Independent Claim
94 words
A METHOD OF RECOVERING PLATINUM FROM A PLATINUM REFRACTORY METAL OXIDE COMPOSITE WHICH COMPRISES TREATING SAID COMPOSITE WITH A REAGENT AND FORMING A SOLUBLE COMPOUND OF A PORTION OF SAID REFRACTORY METAL OXIDE, DISSOLVING SAID SOLUBLE COMPOUND PROVIDING THEREBY A SOLUTION OF SAID SOLUBLE COMPOUND, SEPARATING PLATINUM AND UNDISSOLVED REFRACTORY METAL OXIDE IN A SOLID FORM FROM SAID SOLUTION, TREATING THE THUS SEPARATED SOLID MATERIAL WITH A STRONG BASE AND FORMING A SOLUBLE COMPOUND OF REMAINING REFRACTORY METAL OXIDE, DISSOLVING SAID LAST MENTIONED SOLUBLE COMPOUND AND SEPARATING PLATINUM IN A SOLID FROM THE SOLUTION.
References Cited (Backward Citations)
US2662861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-06-13 | 1958-12-13 | 1959-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-06-13 | 1962-12-13 | 1963-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-06-13 | 1966-12-13 | 1967-06-14 | $7700.00 | Window Closed / Lapsed |