US2945757A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of noble metals from catalytic composites
Assignee: Universal Oil Products Co
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Filing: 1956-11-02
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Granted: 1960-07-19
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Expires: 1976-11-02
Abstract
No abstract record available.
Inventors
- 👤 Hoekstra James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:49
CPC Classifications
C; C01; C01G; C01G55/00; C01G55/001; B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; C01G5/00; C01G5/003; C01G7/00; C01G7/003; C22; C22B; C22B11/00; C22B11/04; C22B11/042; C22B11/048; C22B3/00; C22B3/20; C22B3/26; C22B3/306; C22B3/32; C22B3/44; C22B7/00; C22B7/009; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02P20/00; Y02P20/50; Y02P20/584
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A METHOD FOR RECOVERING A NOBLE METAL FROM A NOBLE METAL-REFRACTORY INORGANIC OXIDE COMPOSITE WHICH COMPRISES DISSOLVING THE INORGANIC OXIDE OUT OF THE COMPOSITE WITH HYDROCHLORIC ACID IN THE PRESENCE OF AN ORGANIC REDUCING AGENT IN SUFFICIENT AMOUNT TO PREVENT DISSOLUTION OF THE NOBLE METAL, AND SEPARATING THE RESULTING SOLUTION FROM THE UNDISSOLVED NOBLE METAL.
Claim 2
Independent Claim
55 words
A METHOD FOR RECOVERING A NOBLE METAL FROM A NOBLE METAL-REFRACTORY INORGANIC OXIDE COMPOSITE WHICH COMPRISES DISSOLVING THE INORGANIC OXIDE OUT OF THE COMPOSITE WITH HYDROCHLORIC ACID IN THE PRESENCE OF AN ORGANIC REDUCING AGENT IN SUFFICIENT AMOUNT TO PREVENT DISSOLUTION OF THE NOBLE METAL, AND SEPARATING THE RESULTING SOLUTION FROM THE UNDISSOLVED NOBLE METAL.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |