US2921033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of catalysts
Assignee: Oxy Catalyst Inc
•
Filing: 1954-08-05
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Granted: 1960-01-12
•
Expires: 1974-08-05
Abstract
No abstract record available.
Inventors
- 👤 Eugene J Houdry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:47
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/0009; Y; Y10; Y10S; Y10S502/00; Y10S502/50; Y10S502/504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
IN THE MANAFACTURE OF PELLET TYPE CATALYSTS, A METHOD FOR PRODUCING HARD, ATTRITION RESISTANT MOLDED PELLETS FROM A CATALYTICALLY ACTIVE FORM OF AN INORGANIC OXIDE SELECTED FROM THE GROUP CONSISITING OF ALUMINA, BERYLLIA, AND SILICA, SAID METHOD COMPRISING THE STEP OF EXTRUDING THE PELLETS FROM A MASS CONTAINING SAID OXIDE IN AT LEAST POTENTIALLY ACTIVE BUT NON-GELATINOUS FORM AND IN SUCH DEGREE OF SUBDIVISION THAT SUBSTANTIALLY 100% BY WEIGHT THEREOF CONSISTS OF PARTICLES OF LESS THAN 40 MICRONS IN SIZE, AND THE SPECIFIC SURFACE THEREOF IS AT LEAST 60,000 CM.2/CM.3
Claim 2
Dependent Claim
90 words
IN THE MANAFACTURE OF PELLET TYPE CATALYSTS, A METHOD FOR PRODUCING HARD, ATTRITION RESISTANT MOLDED PELLETS FROM A CATALYTICALLY ACTIVE FORM OF AN INORGANIC OXIDE SELECTED FROM THE GROUP CONSISITING OF ALUMINA, BERYLLIA, AND SILICA, SAID METHOD COMPRISING THE STEP OF EXTRUDING THE PELLETS FROM A MASS CONTAINING SAID OXIDE IN AT LEAST POTENTIALLY ACTIVE BUT NON-GELATINOUS FORM AND IN SUCH DEGREE OF SUBDIVISION THAT SUBSTANTIALLY 100% BY WEIGHT THEREOF CONSISTS OF PARTICLES OF LESS THAN 40 MICRONS IN SIZE, AND THE SPECIFIC SURFACE THEREOF IS AT LEAST 60,000 CM.2/CM.3
References Cited (Backward Citations)
US2247624A
Cited
US2423686A
Cited
US2580806A
Cited
US2686161A
Cited
US2695893A
Cited
US2650202A
Cited
US2669547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |