US2911375A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of platinum catalysts
Assignee: Standard Oil Co
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Filing: 1956-09-17
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Granted: 1959-11-03
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Expires: 1976-09-17
Abstract
No abstract record available.
Inventors
- 👤 John R Coley
- 👤 Heard Llawellyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:14
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
A PROCESS FOR MANUFACTURING PLATINUM-ON-ALUMINA CATALYST WHICH COMPRISES PREPARING AN ALUMINA HYDROSOL BY TREATING ALUMINUM METAL WITH A DILUTE ACID IN THE PRESENCE OF CATALYTIC AMOUNTS OF MERCURY, MIXING A PLATINUM COMPOUND WITH SAID ALUMINA HYDROSOL, DRYING AND CALCINING THE RESULTANT PRODUCT, AND TREATING THE CALCINED MIXTURE WITH HYDROGEN TO ACTIVATE THE SAME.
Claim 2
Dependent Claim
53 words
A PROCESS FOR MANUFACTURING PLATINUM-ON-ALUMINA CATALYST WHICH COMPRISES PREPARING AN ALUMINA HYDROSOL BY TREATING ALUMINUM METAL WITH A DILUTE ACID IN THE PRESENCE OF CATALYTIC AMOUNTS OF MERCURY, MIXING A PLATINUM COMPOUND WITH SAID ALUMINA HYDROSOL, DRYING AND CALCINING THE RESULTANT PRODUCT, AND TREATING THE CALCINED MIXTURE WITH HYDROGEN TO ACTIVATE THE SAME.
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) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |