US2863761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of platinum from alumina-platinum-containing catalytic materials
Assignee: Wyeth Holdings LLC
•
Filing: 1955-07-26
•
Granted: 1958-12-09
•
Expires: 1975-07-26
Abstract
No abstract record available.
Inventors
- 👤 Kenneth D Ashley
- 👤 Gorgo J Bruni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; 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
59 words
A METHOD OF RECOVERING PLATINUM FROM AN ALUMINAPLATINUM CATALYST WHICH COMPRRISES DIGESTING SAID CATALYST WITH AQUEOUS HYDROCHLORIC ACID AND THEREBY FORMING A SUSPENSION OF FINELY DIVIDED METALLIC PLATINUM IN AN AQUEOUS ALUMINUM CHLORIDE SOLUTION, ADDING A FLOCCULAING AGENT TO SAID SUSPENSION AND THEREBY FLOCCULATING THE FINELY DIVIDED PLATINUM PARTICLES SUSPENDED THEREIN, AND SEPARATING THE FLOCCULATED PLATINUM FROM THE SOLUTION.
Claim 2
Independent Claim
59 words
A METHOD OF RECOVERING PLATINUM FROM AN ALUMINAPLATINUM CATALYST WHICH COMPRRISES DIGESTING SAID CATALYST WITH AQUEOUS HYDROCHLORIC ACID AND THEREBY FORMING A SUSPENSION OF FINELY DIVIDED METALLIC PLATINUM IN AN AQUEOUS ALUMINUM CHLORIDE SOLUTION, ADDING A FLOCCULAING AGENT TO SAID SUSPENSION AND THEREBY FLOCCULATING THE FINELY DIVIDED PLATINUM PARTICLES SUSPENDED THEREIN, AND SEPARATING THE FLOCCULATED PLATINUM FROM THE SOLUTION.
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) | 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 |