Patent US3451947A successfully refreshed from Google Patents.
US3451947A
Expired / Lapsed
US
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Selective cracking catalyst
Assignee: Wyeth Holdings LLC
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Filing: 1966-05-05
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Granted: 1969-06-24
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Expires: 1986-05-05
Abstract
No abstract record available.
Inventors
- 👤 Malden Ward Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:26
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/12; B01J21/20; C; C10; C10G; C10G11/00; C10G11/02; C10G11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A COMPOSITION COMPRISING (1) A SUBSTANTIALLY SODIUMION-FREE AMORPHOUS ALUMINOSILICATE COGEL CHARACTERIZED BY A PORE VOLUME RANGING FROM ABOUT 0.05 CC/G. TO ABOUT 0.50 CC./G. IN AN AMOUNT RANGING FROM AN AMOUNT SUFFICIENT TO BE EFFECTIVE UP TO ABOUT 70% BY WEIGHT OF SAID TOTAL COMPOSITION, AND CONTAINING FROM ABOUT 2 TO 15% OF A MINOR AMOUNT OF SALT OF A NON-GROUP 1 CATION, OTHER THAN ALUMINUM, SAID ALUMINA CONTENT RANGING FROM ABOUT 8% UP TO ABOUT 30% BY WEIGHT OF SAID COGEL, AND (2) A LOW ALUMINA COMPOSITON, CONTAINING FROM ABOUT 8 TO 15% OF ALUMINA, IN AN AMOUNT RANGING FROM ABOUT 90% TO ABOUT 30% BY WEIGHT OF SAID TOTAL COMPOSITION.
Claim 2
Dependent Claim
112 words
A COMPOSITION COMPRISING (1) A SUBSTANTIALLY SODIUMION-FREE AMORPHOUS ALUMINOSILICATE COGEL CHARACTERIZED BY A PORE VOLUME RANGING FROM ABOUT 0.05 CC/G. TO ABOUT 0.50 CC./G. IN AN AMOUNT RANGING FROM AN AMOUNT SUFFICIENT TO BE EFFECTIVE UP TO ABOUT 70% BY WEIGHT OF SAID TOTAL COMPOSITION, AND CONTAINING FROM ABOUT 2 TO 15% OF A MINOR AMOUNT OF SALT OF A NON-GROUP 1 CATION, OTHER THAN ALUMINUM, SAID ALUMINA CONTENT RANGING FROM ABOUT 8% UP TO ABOUT 30% BY WEIGHT OF SAID COGEL, AND (2) A LOW ALUMINA COMPOSITON, CONTAINING FROM ABOUT 8 TO 15% OF ALUMINA, IN AN AMOUNT RANGING FROM ABOUT 90% TO ABOUT 30% BY WEIGHT OF SAID TOTAL COMPOSITION.
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) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |