US2885369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst preparation
Assignee: Engelhard Industries Inc
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Filing: 1952-07-19
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Granted: 1959-05-05
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Expires: 1972-07-19
Abstract
No abstract record available.
Inventors
- 👤 John W Teter
- 👤 Carl D Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:34
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
IN THE PRODUCTION OF ALUMIN BASE-PLATINUM METAL TYPE REFORMING CATALYST CHARACTERIZED BY FORMATION OF AN ALUMINA HYDRATE SLURRY BY PRECIPATION FROM A WATER SOLUBLE ALUMINUM SALT, WASHING THE HYDRATE SLURRY TO A LOW CONCENTRATION OF EXTRANEOUS IONS, TRANSFORMING THE HYDRATE TO A MIXTURE OF HYDRATE PHASES PREDOMINATING IN ALUMINA TRIHYDRATES AND DRYING AND CALCINING THE HYDRATE PHASES, THE IMPROVEMENT WHICH COMPRISES INCORORATING THE PLATINUM METAL IN THE HYDRATE MIXTURE AT A POINT SUBSEQUENT TO INITIAL PRECIPATION OF THE HYDRATE AND PRIOR TO A TRANSFORMATION OF SAID HYDRATE TO A COMPOSITION PREDOMINATING IN ALUMINA TRIHYDRATE EXCEEDING ABOUT 50 PERCENT.
Claim 2
Dependent Claim
98 words
IN THE PRODUCTION OF ALUMIN BASE-PLATINUM METAL TYPE REFORMING CATALYST CHARACTERIZED BY FORMATION OF AN ALUMINA HYDRATE SLURRY BY PRECIPATION FROM A WATER SOLUBLE ALUMINUM SALT, WASHING THE HYDRATE SLURRY TO A LOW CONCENTRATION OF EXTRANEOUS IONS, TRANSFORMING THE HYDRATE TO A MIXTURE OF HYDRATE PHASES PREDOMINATING IN ALUMINA TRIHYDRATES AND DRYING AND CALCINING THE HYDRATE PHASES, THE IMPROVEMENT WHICH COMPRISES INCORORATING THE PLATINUM METAL IN THE HYDRATE MIXTURE AT A POINT SUBSEQUENT TO INITIAL PRECIPATION OF THE HYDRATE AND PRIOR TO A TRANSFORMATION OF SAID HYDRATE TO A COMPOSITION PREDOMINATING IN ALUMINA TRIHYDRATE EXCEEDING ABOUT 50 PERCENT.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |