US2828200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing platinum from a composite containing platinum and alumina
Assignee: Universal Oil Products Co
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Filing: 1955-07-25
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Granted: 1958-03-25
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Expires: 1975-07-25
Abstract
No abstract record available.
Inventors
- 👤 William G Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:40
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/02; C22B11/021; C22B11/026; C22B5/00; C22B5/02; C22B5/16; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A METHOD OF REMOVING PLATINUM FROM A COMPOSITE COMPRISING PLATINUM AND ALUMINA WHICH COMPRISES HEATING SAID COMPOSITE IN A CONFINED STRIPPING ZONE TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200*F. TO ABOUT 1600*F., REACTING THE ALUMINA IN SAID STRIPPING ZONE WITH A VOLATILE CHLORINE-CONTAINING MATERIAL AND FORMING ALUMINUM CHLORIDE VAPORS BY THE REACTION OF SAID MATERIAL WITH SAID ALUMINA, STRIPPING PLATINUM FROM SAID COMPOSITE BY SAID VAPORS, WITHDRAWING VAPORS FROM SAID ZONE AND RECOVERING PLATINUM FROM SAID VAPORS.
Claim 2
Independent Claim
80 words
A METHOD OF REMOVING PLATINUM FROM A COMPOSITE COMPRISING PLATINUM AND ALUMINA WHICH COMPRISES HEATING SAID COMPOSITE IN A CONFINED STRIPPING ZONE TO A TEMPERATURE WITHIN THE RANGE OF FROM ABOUT 200*F. TO ABOUT 1600*F., REACTING THE ALUMINA IN SAID STRIPPING ZONE WITH A VOLATILE CHLORINE-CONTAINING MATERIAL AND FORMING ALUMINUM CHLORIDE VAPORS BY THE REACTION OF SAID MATERIAL WITH SAID ALUMINA, STRIPPING PLATINUM FROM SAID COMPOSITE BY SAID VAPORS, WITHDRAWING VAPORS FROM SAID ZONE AND RECOVERING PLATINUM FROM SAID VAPORS.
References Cited (Backward Citations)
US1876943A
Cited
US2607675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-24 | 1961-09-23 | 1962-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-24 | 1965-09-23 | 1966-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-24 | 1969-09-23 | 1970-03-25 | $7700.00 | Window Closed / Lapsed |