US2863762A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of noble metals
Assignee: Universal Oil Products Co
•
Filing: 1956-12-28
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Granted: 1958-12-09
•
Expires: 1976-12-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Pullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:11
CPC Classifications
C; C22; C22B; C22B11/00; C22B11/04; C22B11/042; C22B11/048; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A METHOD FOR RECOVERING NOBLE METALS FROM DEACTIVATED NOBLE METAL-CONTAINING CATALYTIC COMPOSITES CONTAMINATED WITH ARSENIC WHICH COMPRISES REACTING SAID COMPOSITE WITH AN INORGANIC ACID, SEPARATING THE UNDISSOLVED NOBLE METAL-CONTAINING SLUDGE FROM THE RESULTING MIXTURE, DISSOLVING SAID NOBLE METAL-CONTAINING SLUDGE, ADDING HYDROCHLORIC ACID AND A FERROUS SALT TO THE RESULTING SOLUTION AND SUBJECTING THE MIXTURE TO DISTILLATION.
Claim 2
Independent Claim
56 words
A METHOD FOR RECOVERING NOBLE METALS FROM DEACTIVATED NOBLE METAL-CONTAINING CATALYTIC COMPOSITES CONTAMINATED WITH ARSENIC WHICH COMPRISES REACTING SAID COMPOSITE WITH AN INORGANIC ACID, SEPARATING THE UNDISSOLVED NOBLE METAL-CONTAINING SLUDGE FROM THE RESULTING MIXTURE, DISSOLVING SAID NOBLE METAL-CONTAINING SLUDGE, ADDING HYDROCHLORIC ACID AND A FERROUS SALT TO THE RESULTING SOLUTION AND SUBJECTING THE MIXTURE TO DISTILLATION.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |