US2840532A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina platinum catalyst and preparation thereof
Assignee: Universal Oil Products Co
•
Filing: 1953-07-17
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Granted: 1958-06-24
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Expires: 1973-07-17
Abstract
No abstract record available.
Inventors
- 👤 Haensel Viadimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:05
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J21/00; B01J21/02; B01J27/00; B01J37/00; B01J37/02; B01J37/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE COMPOSITING OF PLATINUM WITH ALUMINA,THE STEP WHICH COMPRISES IMPREGNATING THE ALUMINA WITH A HOMOGENEOUS AQUEOUS SOLUTION OF A WATER-SOLUBLE PLATINUM COMPOUND AND AN ACIDIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, SULFURIC ACID, PHOSPHORIC ACID, ALUMINUM NITRATE, ACETIC ACID, OXALIC ACID, FORMIC ACID, AND PROPIONIC ACID IN AN AMOUNT TO IMPART TO THE SOLUTION A PH VALUE BELOW 2.5.
Claim 2
Dependent Claim
63 words
IN THE COMPOSITING OF PLATINUM WITH ALUMINA,THE STEP WHICH COMPRISES IMPREGNATING THE ALUMINA WITH A HOMOGENEOUS AQUEOUS SOLUTION OF A WATER-SOLUBLE PLATINUM COMPOUND AND AN ACIDIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF NITRIC ACID, SULFURIC ACID, PHOSPHORIC ACID, ALUMINUM NITRATE, ACETIC ACID, OXALIC ACID, FORMIC ACID, AND PROPIONIC ACID IN AN AMOUNT TO IMPART TO THE SOLUTION A PH VALUE BELOW 2.5.
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) | 1961-06-23 | 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 |