Patent US2840529A successfully refreshed from Google Patents.
US2840529A
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US
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Alumina containing catalyst
Assignee: MW Kellogg Co
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Filing: 1952-04-21
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Granted: 1958-06-24
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Expires: 1972-04-21
Abstract
No abstract record available.
Inventors
- 👤 Philip A Lcfrancois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:38
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J23/38; B01J23/54; B01J23/56; B01J23/60
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
A METHOD OF PRODUCING A CATALYST CONSISTING ESSENTIALLY OF REACTING ALUMINUM, WATER AND A COMPOUND OF A METAL SELECTED FROM THE GROUP CONSISTING OF MERCURY, ZINC AND CADMIUM IN AN AMOUNT FROM 0.0005 TO ABOUT 0.1 POUND PER POUND OF ALUMINUM AT A TEMPERATURE OF AT LEAST ABOUT 150*F. TO PRODUCE ALUMINA IN A SLURRY HAVING A PH BETWEEN ABOUT 7.5 AND ABOUT 9.5; COMBINING A SILICA FORMING SUBSTNCE, THE ALUMINA AND A SUITABLE PRECURSOR MATERIAL OF A CATALYTIC AGENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDNUM OXIDE AND PLATINUM; AND SUBJECTING THE RESULTANT MIXTURE TO AN ELEVATED TEMPERATURE SUFFICIENT TO PRODUCE A CATALYST CONTAINING THE CATALYTIC SUPPORTED ON ALUMINA AND SILICA.
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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) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |