Patent US2636845A successfully refreshed from Google Patents.
US2636845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactivation of conversion catalysts
Assignee: Standard Oil Development Co
•
Filing: 1949-09-08
•
Granted: 1953-04-28
•
Expires: 1969-09-08
Abstract
No abstract record available.
Inventors
- 👤 Roger W Richardson
- 👤 Julius P Bilisoly
- 👤 Marnell A Segura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:44
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A METHOD OF REACTIVATING PARTIALLY DEACTIVATED SILICA-ALUMINA HYDROCARBON CNVERSION CATALYST CONTAINING ABOUT 12% OF ALUMINA WHICH HAS BEEN USED IN A NUMBER OF CONVERSION OPERATIONS AND REGENERATION OPERATIONS WHICH COMPRISES TREATING THE PARTIALLY DEACTIVATED CATALYST WITH A MIXTURE OF 3 MOLES HYDROGEN FLUORIDE AND 1 MOLE BORIC ACID FOR A SUFFICIENT PERIOD OF TIME TO REACTIVATE OR REVIVIFY THE CATALYST.
Claim 2
Independent Claim
60 words
A METHOD OF REACTIVATING PARTIALLY DEACTIVATED SILICA-ALUMINA HYDROCARBON CNVERSION CATALYST CONTAINING ABOUT 12% OF ALUMINA WHICH HAS BEEN USED IN A NUMBER OF CONVERSION OPERATIONS AND REGENERATION OPERATIONS WHICH COMPRISES TREATING THE PARTIALLY DEACTIVATED CATALYST WITH A MIXTURE OF 3 MOLES HYDROGEN FLUORIDE AND 1 MOLE BORIC ACID FOR A SUFFICIENT PERIOD OF TIME TO REACTIVATE OR REVIVIFY THE 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) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |