US2606159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Depth-controlled impregnation of alumina-base catalyst pellets
Assignee: Phillips Petroleum Co
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Filing: 1950-10-30
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Granted: 1952-08-05
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Expires: 1970-10-30
Abstract
No abstract record available.
Inventors
- 👤 James R Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 00:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J37/00; B01J37/0009; B01J37/0018; B01J37/02; B01J37/0201; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
A PROCESS FOR THE MANUFACTURE OF A PELLETED COMPOSITE ALUMINA-METAL OXIDE CATALYST WHICH COMPRISES ADMIXING PARTICULATE ALUMINA WITH A COMBUSTIBLE BINDER, FORMING THE RESULTING MIXTURE INTO PELLETS, REMOVING FROM 15 TO 85 PER CENT OF THE BINDER FROM THE PELLETS BY COMBUSTION SO AS TO FORM A POROUS SHELL SURROUNDING A RELATIVELY IMPREVIOUS CORE IN EACH PELLET, IMPREGNATING THE RESULTING POROUS SHELL OF THE PELLETS WITH AN AQUEOUS SOLUTION OF A METAL COMPOUND CONVERTED TO THE OXIDE UPON CALCINATION, AND CALCINING THE RESULTING IMPREGNATED PELLETS AT AN ELEVATED TEMPERATURE FOR A PERIOD OF TIME SUFFICIENT TO CONVERT SAID METAL COMPOUND TO AN OXIDE THEREOF AND BURN OUT THE REMAINING PORTION OF THE BINDER.
References Cited (Backward Citations)
US2123732A
Cited
US2500146A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-05 | 1956-02-04 | 1956-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-05 | 1960-02-04 | 1960-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-05 | 1964-02-04 | 1964-08-05 | $7700.00 | Window Closed / Lapsed |