Patent US2703789A successfully refreshed from Google Patents.
US2703789A
Expired / Lapsed
US
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Catalyst preparation
Assignee: Gulf Research and Development Co
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Filing: 1951-04-23
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Granted: 1955-03-08
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Expires: 1971-04-23
Abstract
No abstract record available.
Inventors
- 👤 Joseph B Mckinley
- 👤 William A Pardee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:50
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/888
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF PREPARING A COMBINED NICKEL OXIDETUNGSTEN OXIDE CATALYST DEPOSITED UPON A POROUS CARRIER WHICH COMPRISES REACTING A SLURRY OF TUNGSTIC ACID WITH AMMONIUM HYDROXIDE IN AN AMOUNT WHICH IS NOT IN EXCESS OF THAT REQUIRED TO FORM AMMONIUM META TUNGSTATE AND WHICH AMOUNT WILL RESULT IN A SOLUTION HAVING A PH OF BETWEEN ABOUT 2 AND 5, ADDING THERETO AN AQUEOUS SOLUTION OF A NICKEL SALT WHICH WHEN ADDED TO SAID SOLUTION OF AMMONIUM META TUNGSTATE WILL RESULT IN A MIXED SOLUTION HAVING A PH BETWEEN ABOUT 2 AND 5, IMPREGNATING UNELUTRIATED MICROSPHERES OF SYNTHEIC SILICA-ALUMINA CRACKING CATALYST WITH THE MIXED SOLUTION AND DRYING AND CALCINING THE IMPREGNATED SILICA-ALUMINA CATALYST.
References Cited (Backward Citations)
US2258111A
Cited
US2486361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |