US3846286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodesulfurization catalyst
Assignee: Imperial Chemical Industries Ltd
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Filing: 1973-04-04
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Granted: 1974-11-05
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Expires: 1993-04-04
Abstract
Abstract 1. A CATALYST PRECURSOR COMPOSITION WHICH CONSISTS ESSENTIALLY OF AT LEAST 50% BY WEIGHT ALUMINA AT LEAST PARTLY IN THE FORM OF SHEETS OF FINE CRYSTALLITES, SAID SHEETS BEING OF THE ORDER OF 20-30 ANGSTROM UNITS IN THICKNESS AND UP TO 60 ANGSTROM UNITS IN LENGTH IN THE PLANE OF THE SHEETS, 1-20% BY WEIGHT OF A METAL OXIDE FROM GROUP VIB OF THE PERIODIC TABLE, 0.5-15% BY WEIGHT OF A BASE METAL OXIDE FROM T GROUP VIII OF THE PERIODIC TABLE, AND 1-10% OF A GROUP II-A METAL OXIDE, SAID COMPOSITION BEING FURTHER CHARACTERISED BY BEING IN THE FORM OF COMPRESSED SHAPES HAVING A DENSITY UNDER 1.2 AND A MEAN CRUSHING STRENGTH OF AT LEAST 280 P.S.I.
Inventors
- 👤 J Phillipson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8872; B01J35/00; B01J35/70; B01J37/00; B01J37/0009; B01J37/04; C; C10; C10G; C10G45/00; C10G45/02; C10G45/04; C10G45/06; C10G45/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A CATALYST PRECURSOR COMPOSITION WHICH CONSISTS ESSENTIALLY OF AT LEAST 50% BY WEIGHT ALUMINA AT LEAST PARTLY IN THE FORM OF SHEETS OF FINE CRYSTALLITES, SAID SHEETS BEING OF THE ORDER OF 20-30 ANGSTROM UNITS IN THICKNESS AND UP TO 60 ANGSTROM UNITS IN LENGTH IN THE PLANE OF THE SHEETS, 1-20% BY WEIGHT OF A METAL OXIDE FROM GROUP VIB OF THE PERIODIC TABLE, 0.5-15% BY WEIGHT OF A BASE METAL OXIDE FROM T GROUP VIII OF THE PERIODIC TABLE, AND 1-10% OF A GROUP II-A METAL OXIDE, SAID COMPOSITION BEING FURTHER CHARACTERISED BY BEING IN THE FORM OF COMPRESSED SHAPES HAVING A DENSITY UNDER 1.2 AND A MEAN CRUSHING STRENGTH OF AT LEAST 280 P.S.I.
Claim 2
Dependent Claim
117 words
A CATALYST PRECURSOR COMPOSITION WHICH CONSISTS ESSENTIALLY OF AT LEAST 50% BY WEIGHT ALUMINA AT LEAST PARTLY IN THE FORM OF SHEETS OF FINE CRYSTALLITES, SAID SHEETS BEING OF THE ORDER OF 20-30 ANGSTROM UNITS IN THICKNESS AND UP TO 60 ANGSTROM UNITS IN LENGTH IN THE PLANE OF THE SHEETS, 1-20% BY WEIGHT OF A METAL OXIDE FROM GROUP VIB OF THE PERIODIC TABLE, 0.5-15% BY WEIGHT OF A BASE METAL OXIDE FROM T GROUP VIII OF THE PERIODIC TABLE, AND 1-10% OF A GROUP II-A METAL OXIDE, SAID COMPOSITION BEING FURTHER CHARACTERISED BY BEING IN THE FORM OF COMPRESSED SHAPES HAVING A DENSITY UNDER 1.2 AND A MEAN CRUSHING STRENGTH OF AT LEAST 280 P.S.I.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |