US3210294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon cracking catalyst
Assignee: Wyeth Holdings LLC
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Filing: 1963-08-14
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Granted: 1965-10-05
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Expires: 1983-08-14
Abstract
No abstract record available.
Inventors
- 👤 Chomitz Nicholas
- 👤 Cullo Leonard Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:31
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PREPARING A SILICA ALUMINA CRACKING CATALYST WHICH COMPRISES ADDING AN ALKALI METAL ALUMINATE TO A SILICA GEL SLURRY UNTIL THE PH THEREOF IS APROXIMATELY 11 TO 12, SUBSEQUENTLY ADDING AN ALUMINUM SULFATE TO THE ALUMINATE-SILICA GEL SLURRY UNTIL THE PH THEREOF IS APPROXIMATELY 4 TO 5 WHEREBY A SILICA ALUMINA PRECIPITATE IS OBTAINED, RECOVERING SAID PRECIPITATE, DRYING AND CALCINING THE SAME.
Claim 2
Dependent Claim
64 words
A PROCESS FOR PREPARING A SILICA ALUMINA CRACKING CATALYST WHICH COMPRISES ADDING AN ALKALI METAL ALUMINATE TO A SILICA GEL SLURRY UNTIL THE PH THEREOF IS APROXIMATELY 11 TO 12, SUBSEQUENTLY ADDING AN ALUMINUM SULFATE TO THE ALUMINATE-SILICA GEL SLURRY UNTIL THE PH THEREOF IS APPROXIMATELY 4 TO 5 WHEREBY A SILICA ALUMINA PRECIPITATE IS OBTAINED, RECOVERING SAID PRECIPITATE, DRYING AND CALCINING THE SAME.
References Cited (Backward Citations)
US2933456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |