Patent US2800518A successfully refreshed from Google Patents.
US2800518A
Expired / Lapsed
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Activated alpha alumina, its formation, and its use
Assignee: Phillips Petroleum Co
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Filing: 1949-10-11
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Granted: 1957-07-23
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Expires: 1969-10-11
Abstract
No abstract record available.
Inventors
- 👤 Emory W Pitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:55
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/16
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
50 words
A PROCESS FOR THE CATALYTIC DEHYDROGENATION OF HYDROCARBONS WHICH COMPRISES SUBJECTING A DEHYDROGENATABLE HYDROCARBON AT DEHYDROGENATION CONDITIONS TO CONTACT WITH A DEHYDROGENATION CATALYST COMPRISING AN INTIMATE ADMIXTURE OF A METAL OXIDE DEHYDROGENATION CATALYST AND AN ACTIVATED ALPHA ALUMINA HAVING A SURFACE AREA OF AT LEAST 6 SQUARE METERS PER GRAM.
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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) | 1960-07-22 | 1961-01-21 | 1961-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-22 | 1965-01-21 | 1965-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-22 | 1969-01-21 | 1969-07-23 | $7700.00 | Window Closed / Lapsed |