US3264228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing alumina coated catalyst compositions
Assignee: BP PLC
•
Filing: 1962-08-31
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Granted: 1966-08-02
•
Expires: 1982-08-31
Abstract
No abstract record available.
Inventors
- 👤 Burbidge Bernard Whiting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:15
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04; B01J37/00; B01J37/02; B01J37/0215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
A METHOD OF PREPARING ALUMINA-CONTAINING CATALYASTS, COMPRISING: FORMING AN ALUMINA HYDRATE HYDROGEL, DRYING THE HYDROGEL AT A TEMPERATURE OF FROM ABOUT 15 TO 40*C TO A WATER CONTENT, INCLUDING COMBINED WATER, OF LESS THAN 70% WEIGHT OF THE DRIED ALUMINA HYDRATE, AND DISPERSING SAID DRIED ALUMINA HYDRATE IN WATER TO GIVE A COLLOIDAL SUSPENSION STALE AT AMBIENT TEMPERATURE AND CONTAINING ONLY PARTICLES OF ALUMINA HYDRATE OF NOT MORE THAN TWO MICRONS DIAMETER, FORMING A CATALYST STRUCTURE FROM SAID COLLOIDAL SUSPENSION BY APPLYING SAID SUSPENSION AS A THIN FILM TO A CATALYTICALLY INACTIVE SUPPORT AND DRYING THE THIN FILM SO PRODUCED, AND CLACINING THE ALUMINA HYDRATE TO ALUMINA.
Claim 2
Independent Claim
107 words
A METHOD OF PREPARING ALUMINA-CONTAINING CATALYASTS, COMPRISING: FORMING AN ALUMINA HYDRATE HYDROGEL, DRYING THE HYDROGEL AT A TEMPERATURE OF FROM ABOUT 15 TO 40*C TO A WATER CONTENT, INCLUDING COMBINED WATER, OF LESS THAN 70% WEIGHT OF THE DRIED ALUMINA HYDRATE, AND DISPERSING SAID DRIED ALUMINA HYDRATE IN WATER TO GIVE A COLLOIDAL SUSPENSION STALE AT AMBIENT TEMPERATURE AND CONTAINING ONLY PARTICLES OF ALUMINA HYDRATE OF NOT MORE THAN TWO MICRONS DIAMETER, FORMING A CATALYST STRUCTURE FROM SAID COLLOIDAL SUSPENSION BY APPLYING SAID SUSPENSION AS A THIN FILM TO A CATALYTICALLY INACTIVE SUPPORT AND DRYING THE THIN FILM SO PRODUCED, AND CLACINING THE ALUMINA HYDRATE TO ALUMINA.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |