US2677668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilization of reduced metal catalyst
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
2026-10-29 02:39
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 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 EXPOSING SAID CATALYST AFTER REDUCTION TO AN ATMOSPHERE OF CARBON DIOXIDE AT ABOUT ROOM TEMPERATURE, INTRODUCING INTO SAID ATMOSPHERE APPROXIMATELY 0.1% BY VOLUME OF OXYGEN, ADDING OXYGEN TO SAID ATMOSPHERE OVER A PERIOD OF TIME UNTIL SAID CATALYST IS STABLE TO ATMOSPHERIC AIR, AND INTERRUPTING THE ADDITION OF OXYGEN TO SAID ATMOSPHERE PERIODICALLKY TO PREVENT THE TEMPERATURE OF SAID CATALYST FROM RISING ABOVE ABOUT 125* F.
Claim 2
Independent Claim
92 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 EXPOSING SAID CATALYST AFTER REDUCTION TO AN ATMOSPHERE OF CARBON DIOXIDE AT ABOUT ROOM TEMPERATURE, INTRODUCING INTO SAID ATMOSPHERE APPROXIMATELY 0.1% BY VOLUME OF OXYGEN, ADDING OXYGEN TO SAID ATMOSPHERE OVER A PERIOD OF TIME UNTIL SAID CATALYST IS STABLE TO ATMOSPHERIC AIR, AND INTERRUPTING THE ADDITION OF OXYGEN TO SAID ATMOSPHERE PERIODICALLKY TO PREVENT THE TEMPERATURE OF SAID CATALYST FROM RISING ABOVE ABOUT 125* F.
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 |