US2638455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alumina-metal oxide dehydrogenation catalyst and its preparation
Assignee: Phillips Petroleum Co
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Filing: 1948-06-14
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Granted: 1953-05-12
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Expires: 1968-06-14
Abstract
No abstract record available.
Inventors
- 👤 Emory W Pitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:18
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; B01J23/12; B01J23/20; B01J23/22; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
72 words
A PROCESS FOR MANUFACTURING A COMPOSITE CATALYST CONSISTING ESSENTIALLY OF THE OXIDES OF ALUMINUM AND AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF CR, MO, W, U, AND V, WHICH COMPRISES DIGESTING A MIXTURE OF SAID OXIDES WITH NITRIC ACID, HEATING THE DIGESTED MIXTURE SO AS TO COMPLETELY DRY THE SAME AND DECOMPOSE ANY NITRATES THEREIN; AND FORMING THE RESULTING OXIDE COMPOSITE INTO SUITABLE PARTICLES FOR CONTACTING OPERATIONS.
Claim 2
Dependent Claim
72 words
A PROCESS FOR MANUFACTURING A COMPOSITE CATALYST CONSISTING ESSENTIALLY OF THE OXIDES OF ALUMINUM AND AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP CONSISTING OF CR, MO, W, U, AND V, WHICH COMPRISES DIGESTING A MIXTURE OF SAID OXIDES WITH NITRIC ACID, HEATING THE DIGESTED MIXTURE SO AS TO COMPLETELY DRY THE SAME AND DECOMPOSE ANY NITRATES THEREIN; AND FORMING THE RESULTING OXIDE COMPOSITE INTO SUITABLE PARTICLES FOR CONTACTING OPERATIONS.
Claim 3
Dependent Claim
42 words
A CATALYST MANUFACTURED BY THE PROCESS OF CLAIM 1, CONSISTING ESSENTIALLY OF BETWEEN 10 AND 70 PER CENT BY WEIGHT OF AT LEAST ONE OXIDE FROM THE GROUP CONSISTING OF CR, MO, W, U, AND V OXIDES AND THE BALANCE ALUMINUM OXIDE.
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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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |