US2677669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepwise stabilization of reduced metal catalysts
Assignee: United States Atomic Energy Commission
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Filing: 1945-01-11
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Granted: 1954-05-04
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Expires: 1965-01-11
Abstract
No abstract record available.
Inventors
- 👤 Ahlberg Jacob Elston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:41
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/866
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF STABILIZING WITH RESPECT TO ATMOSPHERIC AIR A FINELY DIVIDED PYROPHORIC METAL CATALYST FORMED BY REDUCTION OF A COMPOUND OF SAID METAL WHICH COMPRISES CONTINUOUSLY CIRCULATING THROUGH A BED OF SAID CATALYST, A MIXTURE OF AN INERT GAS AND A SMALL CONTROLLED AMOUNT OF OXYGEN COOLING SAID CIRCULATING GAS MIXTURE TO MAINTAIN THE TEMPERATURE OF SAID MIXTURE AND SAID BED BELOW ROOM TEMPERATURE WHEREBY ONLY THE MORE ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED, THEN RAISING THE TEMPERATURE OF SAID CIRCULATING GAS MIXTURE TO A HIGHER VALUE ABOVE ROOM TEMPERATURE AT WHICH THE LESS ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED WITHOUT SUBSTANTIAL LOCALIZED OVERHEATING AND CONTINUING THE CIRCULATION OF SAID GAS MIXTURE UNTIL THE LESS ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED.
Claim 2
Independent Claim
125 words
THE METHOD OF STABILIZING WITH RESPECT TO ATMOSPHERIC AIR A FINELY DIVIDED PYROPHORIC METAL CATALYST FORMED BY REDUCTION OF A COMPOUND OF SAID METAL WHICH COMPRISES CONTINUOUSLY CIRCULATING THROUGH A BED OF SAID CATALYST, A MIXTURE OF AN INERT GAS AND A SMALL CONTROLLED AMOUNT OF OXYGEN COOLING SAID CIRCULATING GAS MIXTURE TO MAINTAIN THE TEMPERATURE OF SAID MIXTURE AND SAID BED BELOW ROOM TEMPERATURE WHEREBY ONLY THE MORE ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED, THEN RAISING THE TEMPERATURE OF SAID CIRCULATING GAS MIXTURE TO A HIGHER VALUE ABOVE ROOM TEMPERATURE AT WHICH THE LESS ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED WITHOUT SUBSTANTIAL LOCALIZED OVERHEATING AND CONTINUING THE CIRCULATION OF SAID GAS MIXTURE UNTIL THE LESS ACTIVE PORTIONS OF SAID CATALYST ARE STABILIZED.
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) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |