US3112277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Regenerating catalysts exposed to contact with plumbiferous waste products
Assignee: Universal Oil Products Co
•
Filing: 1960-09-19
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Granted: 1963-11-26
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Expires: 1980-09-19
Abstract
No abstract record available.
Inventors
- 👤 Michalko Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:40
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/90; B01J23/96; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/516
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF REGENERATING A LEAD-CONTAMINATED CATALYTIC COMPOSITE OF A REFRACTORY INORGANIC OXIDE SUPPORT AND A CATALYTICALLY ACTIVE COMPONENT COMPRISING AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF GROUPS IB, VA, VIA AND VIII OF THE PERIODIC TABLE, WHICH METHOD COMPRISES CONTACTING SAID COMPOSITE WITH AN AQUEOUS SOLUTION OF FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF A PHOSPHORUS COMPOUND FORMING ANIONS OF A PHOSPHORUS ACID IN THE SOLUTION, SAID CONTACTING BEING AT FROM AMBIENT TEMPERATURE TO ABOUT 200*F. AND FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, WHEREBY TO RESTORE A SUBSTANTIAL PART, AT LEAST, OF THE ACTIVITY OF THE CATALYTIC COMPOSITE, SEPARATING THE THUS TREATED COMPOSITE FROM SAID SOLUTION AND DRYING THE SAME.
Claim 2
Independent Claim
123 words
A METHOD OF REGENERATING A LEAD-CONTAMINATED CATALYTIC COMPOSITE OF A REFRACTORY INORGANIC OXIDE SUPPORT AND A CATALYTICALLY ACTIVE COMPONENT COMPRISING AT LEAST ONE ELEMENT SELECTED FROM THE GROUP CONSISTING OF GROUPS IB, VA, VIA AND VIII OF THE PERIODIC TABLE, WHICH METHOD COMPRISES CONTACTING SAID COMPOSITE WITH AN AQUEOUS SOLUTION OF FROM ABOUT 0.5% TO ABOUT 10% BY WEIGHT OF A PHOSPHORUS COMPOUND FORMING ANIONS OF A PHOSPHORUS ACID IN THE SOLUTION, SAID CONTACTING BEING AT FROM AMBIENT TEMPERATURE TO ABOUT 200*F. AND FOR A TIME PERIOD OF FROM ABOUT 10 MINUTES TO ABOUT 3 HOURS, WHEREBY TO RESTORE A SUBSTANTIAL PART, AT LEAST, OF THE ACTIVITY OF THE CATALYTIC COMPOSITE, SEPARATING THE THUS TREATED COMPOSITE FROM SAID SOLUTION AND DRYING THE SAME.
References Cited (Backward Citations)
US1886411A
Cited
US2867497A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |