US2648393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the recovery of platinum
Assignee: Evonik Operations GmbH
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Filing: 1950-02-01
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Granted: 1953-08-11
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Expires: 1970-02-01
Abstract
No abstract record available.
Inventors
- 👤 Holzmann Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C; C22; C22B; C22B11/00; C22B11/02; C22B11/021; C22B11/026; C22B11/028; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
A METHOD FOR COLLECTING PLATINUM CONTAINED IN A HIGHLY HEATED GAS STREAM LEAVING A PLATINUM CATALYST WHICH COMPRISES PASSING SUCH GASES OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING AT LEAST ONE METAL OXIDE OF A METAL HAVING AN ATOMIC NUMBER FROM 24 TO 29, INCLUSIVE, AND OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING AT LEAST ONE NOBLE METAL OF THE GROUP CONSISTING OF PALLADIUM, PLATINUM, GOLD AND SILVER.
Claim 2
Independent Claim
126 words
A METHOD FOR COLLECTING PLATINUM CONTAINED IN A HIGHLY HEATED GAS STREAM LEAVING A PLATINUM CATALYST WHICH COMPRISES PASSING SUCH GASES OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING AT LEAST ONE METAL OXIDE OF A METAL HAVING AN ATOMIC NUMBER FROM 24 TO 29, INCLUSIVE, AND OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING AT LEAST ONE NOBLE METAL OF THE GROUP CONSISTING OF PALLADIUM, PLATINUM, GOLD AND SILVER.
Claim 3
Independent Claim
61 words
A METHOD FOR COLLECTING PLATINUM CONTAINED IN A HIGHLY HEATED GAS STREAM LEAVING A PLATINUM CATALYST WHICH COMPRISES PASSING SUCH GASES OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING SILVER AND COPPER OXIDE.
Claim 4
Independent Claim
61 words
A METHOD FOR COLLECTING PLATINUM CONTAINED IN A HIGHLY HEATED GAS STREAM LEAVING A PLATINUM CATALYST WHICH COMPRISES PASSING SUCH GASES OVER BAFFLES EXERTING SUBSTANTIALLY NO OBSTRUCTION TO THE FLOW OF THE GAS STREAM, AND HAVING A CORE COMPRISING AT LEAST ONE METAL HAVING AN ATOMIC NUMBER FROM 24 TO 28, INCLUSIVE, AND HAVING A SURFACE COMPRISING SILVER AND COPPER OXIDE.
References Cited (Backward Citations)
US2226113A
Cited
US2226149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |