US2498709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatization catalysts and the preparation thereof
Assignee: Shell Development Co
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Filing: 1947-06-07
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Granted: 1950-02-28
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Expires: 1967-06-07
Abstract
No abstract record available.
Inventors
- 👤 Richard M Roberts
- 👤 Frank T Eggertsen
- 👤 Bernard S Greensfelder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:03
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/88; B01J23/887; B01J23/8873; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A CATALYST HAVING ARMATIZING PROPERTIES WHICH COMPRISES IMPREGNATING AN ACTIVATED ALUMINA WITH A NITRATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND COPPER IN AN AMOUNT CORRESPONDING TO BETWEEN 2% AND 12% OF THE METAL, CALCINATING THE MIXTURE AT A TEMPERATURE BETWEEN 500*C. AND 850*C., THEN IMPREGNATING THE MIXTURE WITH AMMONIUM MOLYBDATE IN AN AMOUNT EQUIVALENT TO BETWEEN 4% AND 20% OF MOLYBDENUM, AND FINALLY CONVERTING THE IMPREGNATED MOLYBDENUM TO MOLYBDENUM OXIDE.
Claim 2
Dependent Claim
81 words
A PROCESS FOR THE PRODUCTION OF A CATALYST HAVING ARMATIZING PROPERTIES WHICH COMPRISES IMPREGNATING AN ACTIVATED ALUMINA WITH A NITRATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND COPPER IN AN AMOUNT CORRESPONDING TO BETWEEN 2% AND 12% OF THE METAL, CALCINATING THE MIXTURE AT A TEMPERATURE BETWEEN 500*C. AND 850*C., THEN IMPREGNATING THE MIXTURE WITH AMMONIUM MOLYBDATE IN AN AMOUNT EQUIVALENT TO BETWEEN 4% AND 20% OF MOLYBDENUM, AND FINALLY CONVERTING THE IMPREGNATED MOLYBDENUM TO MOLYBDENUM OXIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-27 | 1953-08-29 | 1954-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-27 | 1957-08-29 | 1958-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-27 | 1961-08-29 | 1962-02-28 | $7700.00 | Window Closed / Lapsed |