US2963444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivating noble metal containing catalysts
Assignee: Universal Oil Products Co
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Filing: 1958-05-29
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Granted: 1960-12-06
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Expires: 1978-05-29
Abstract
No abstract record available.
Inventors
- 👤 William G Nixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:49
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD FOR REACTIVATING A DEACTIVATED NOBLE METALREFACTORY INORGANIC OXIDE CATALYTIC COMPOSITE WITHOUT REMOVING SAID NOBLE METAL THEREFROM, WHICH COMPRISES OXIDIZING SAID DEACTIVATED COMPOSITE IN AIR AT TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 7000*C., TREATING THE AIR-OXIDIZED COMPOSITE WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP OF N2O3, NO2, N2O5 AND MIXTURES THEREOF AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 25*C. TO ABOUT 1000*C., STRIPPING SAID OXIDE OF NITROGEN FROM SAID COMPOSITE WITH A GAS NOY HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID COMPOSITE TO A REDUCING TREATMENT IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
Claim 2
Independent Claim
112 words
A METHOD FOR REACTIVATING A DEACTIVATED NOBLE METALREFACTORY INORGANIC OXIDE CATALYTIC COMPOSITE WITHOUT REMOVING SAID NOBLE METAL THEREFROM, WHICH COMPRISES OXIDIZING SAID DEACTIVATED COMPOSITE IN AIR AT TEMPERATURE OF FROM ABOUT 300*C. TO ABOUT 7000*C., TREATING THE AIR-OXIDIZED COMPOSITE WITH AN OXIDE OF NITROGEN SELECTED FROM THE GROUP OF N2O3, NO2, N2O5 AND MIXTURES THEREOF AT A TEMPERATURE WITHIN THE RANGE OF ABOUT 25*C. TO ABOUT 1000*C., STRIPPING SAID OXIDE OF NITROGEN FROM SAID COMPOSITE WITH A GAS NOY HAVING A REDUCING ACTION ON SAID OXIDE OF NITROGEN, AND THEREAFTER SUBJECTING SAID COMPOSITE TO A REDUCING TREATMENT IN AN ATMOSPHERE OF HYDROGEN AT A TEMPERATURE OF FROM ABOUT 25*C. TO ABOUT 1000*C.
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) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |