US2849406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of hydroforming catalyst
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1953-05-01
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Granted: 1958-08-26
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Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 Lane Trent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:47
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
89 words
THE METHOD OF REACTIVATING A HYDROFORMING, POROUS, ALUMINA SUPPORTED, METALLIC PLATINUM CONTAINING CATALYST WHICH HAS BECONE DEACTIVAED DURING A HYDROFORMING OPERATION, SAID ALUMINA HAVING A SURFACE AREA OF AT LEAST 25 SQ. METERS PER GRAM, WHICH COMPRISES THE STEPS OF TREATING THE SUPPORTED CATALYST WITH AN AQUEOUS SOLUTION OF ABOUT 5.6 M NITRIC ACID AND 4.2 M HYDROCHLORIC ACID, ABOUT 7 ML. OF THE AQUEOUS SOLUTION BEING UTILIZED PER GRAM OF SUPPORTED CATALYST, AT A MAXIMUM TEMPERATURE OF ABOUT 200*F.; DRYING THE SUPPORTED CATALYST; AND REDUCING THE SUPPORTED CATALYST.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |