Patent US2563957A successfully refreshed from Google Patents.
Patent US2798050A successfully refreshed from Google Patents.
US2798050A
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Preparation of alumina gel
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-04-20
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Granted: 1957-07-02
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Expires: 1973-04-20
Abstract
No abstract record available.
Inventors
- 👤 Elroy M Gladrow
- 👤 Jr William F Arey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:56
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/40; B01J21/00; B01J21/02; B01J21/04; B01J23/42; C; C01; C01F; C01F7/00; C01F7/02; C01F7/34; C01F7/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
A PROCESS FOR PREPARING A PLATIUM GROUP METAL CATALYST SUPPORTED ON ALUMINA GEL WHICH CATALYST POSSESSESS IMPROVED HARDNESS, DENSITY AND INCREASED PORE DIAMETER WHICH COMPRISES REACTING ALUMINUM WITH AN ALCOHOL TO FORM AN ALCOHOLATE, ADDING WATER CONTAINING AN ACIDICC PEPTIZING AGENT TO FORM A HYDROSOL, ADDING UREA IN SUFFICIENT AMOUNT TO NEUTRALIZE THE ACIDIC PEPTIZING AGENT, PROCURING THE SAID PLATINUM GROUP METAL IN THE FORM OF A HYDROSOL, MIXING THE HYDROSOLS, CAUSING THE MIXED HYDROSOLS TO BE CONVERTED TO A HYDROGEL DURING A RELATIVELY SHORT PERIOD OF TIME BY THE APPLICATION TO HEAT, DRYING THE SAID HYDROGEL AND ACTIVATING THE DRY GEL TO FORM AN ACTIVE CATALYST BY HEATING AT AN ELEVATED TEMPERATURE.
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) | 1960-07-01 | 1960-12-31 | 1961-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-01 | 1964-12-31 | 1965-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-01 | 1968-12-31 | 1969-07-02 | $7700.00 | Window Closed / Lapsed |