US2840527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Promoted platinum-alumina catalysts
Assignee: Standard Oil Co
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Filing: 1955-03-29
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Granted: 1958-06-24
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Expires: 1975-03-29
Abstract
No abstract record available.
Inventors
- 👤 Harry M Brennan
- 👤 Herman S Seelig
- 👤 Haar Roy W Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:09
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J37/00; B01J37/02; B01J37/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF PREPARING AN ALUMINA-BASED HYDROFORMING CATALYST OF IMPROVED ACTIVITY, WHICH COMPRISES COMMINGLING A PLATINUM COMPOUND WITH ALUMINA IN A PROPORTION BETWEEN ABOUT 0.05 AND 1 PERCENT BY WEIGHT OF PLATINUM, BASED ON DRY AL2O3, DRYING AND CALCINING THE RESULTING MIXTURE TO A WATER CONTENT BETWEEN ABOUT 1 AND 30 PERCENT BY WEIGHT, DRY BASIS, INTRODUCING INTO THE DRIED AND CALCINED MIXTURE A SINGLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM NITRATE, ALUMINUM SULFATE, ALUMINUM CHLORIDE, ALUMINUM BROMIDE, AND ALUMINUM IODIDE IN A PROPORTION ABOVE ABOUT 0.001 MOLE PER MOLE OF DRY AL2O3, THEREAFTER REMOVING ANY ADDED SOLVENT, AND CALCINING.
Claim 2
Independent Claim
102 words
A METHOD OF PREPARING AN ALUMINA-BASED HYDROFORMING CATALYST OF IMPROVED ACTIVITY, WHICH COMPRISES COMMINGLING A PLATINUM COMPOUND WITH ALUMINA IN A PROPORTION BETWEEN ABOUT 0.05 AND 1 PERCENT BY WEIGHT OF PLATINUM, BASED ON DRY AL2O3, DRYING AND CALCINING THE RESULTING MIXTURE TO A WATER CONTENT BETWEEN ABOUT 1 AND 30 PERCENT BY WEIGHT, DRY BASIS, INTRODUCING INTO THE DRIED AND CALCINED MIXTURE A SINGLE SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ALUMINUM NITRATE, ALUMINUM SULFATE, ALUMINUM CHLORIDE, ALUMINUM BROMIDE, AND ALUMINUM IODIDE IN A PROPORTION ABOVE ABOUT 0.001 MOLE PER MOLE OF DRY AL2O3, THEREAFTER REMOVING ANY ADDED SOLVENT, AND CALCINING.
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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |