Patent US3577322A successfully refreshed from Google Patents.
Patent US3207689A successfully refreshed from Google Patents.
US3207689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of replacing deactivated catalyst in expanded bed process
Assignee: Cities Service Research and Development Co
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Filing: 1963-06-07
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Granted: 1965-09-21
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Expires: 1983-06-07
Abstract
No abstract record available.
Inventors
- 👤 Roger P Van Driesen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:42
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/32; B01J8/20; B01J8/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A PROCESS FOR THE TREATMENT OF HYDROCARBON OIL IN WHICH LIQUID HYDROCARBON OIL IS PASSED UPWARDLY THROUGH A BED OF CATALYST PARTICLES AT A VELOCITY SUFFICIENT TO EXPAND THE VOLUME OF SAID BED OF CATALYST BETWEEN ABOUT 10 AND ABOUT 300 PERCENT BASED ON THE UNEXPANDED VOLUME OF THE BED AND IN WHICH SAID CATALYST BECOMES AT LEAST PARTIALLY DEACTIVATED, THE METHOD OF REPLACING THUS DEACTIVATED CATALYST WHICH COMPRISES WITHDRAWING CATALYST OF A RELATIVELY LARGER AVERAGE PARTICLE SIZE FROM A LOWER PORTION OF SAID BED AND ADDING CATALYST OF A RELATIVELY SMALLER AVERAGE PARTICLE SIZE TO AN UPPER PORTION OF SAID BED UNTIL THE MAJORITY OF THE CATALYST OF SAID RELATIVELY LARGER AVERAGE PARTICLE SIZE HAS BEEN REPLACED WITH SAID CATALYST OF RELATIVELY SMALLER PARTICLE SIZE, AND
Claim 2
Dependent Claim
128 words
IN A PROCESS FOR THE TREATMENT OF HYDROCARBON OIL IN WHICH LIQUID HYDROCARBON OIL IS PASSED UPWARDLY THROUGH A BED OF CATALYST PARTICLES AT A VELOCITY SUFFICIENT TO EXPAND THE VOLUME OF SAID BED OF CATALYST BETWEEN ABOUT 10 AND ABOUT 300 PERCENT BASED ON THE UNEXPANDED VOLUME OF THE BED AND IN WHICH SAID CATALYST BECOMES AT LEAST PARTIALLY DEACTIVATED, THE METHOD OF REPLACING THUS DEACTIVATED CATALYST WHICH COMPRISES WITHDRAWING CATALYST OF A RELATIVELY LARGER AVERAGE PARTICLE SIZE FROM A LOWER PORTION OF SAID BED AND ADDING CATALYST OF A RELATIVELY SMALLER AVERAGE PARTICLE SIZE TO AN UPPER PORTION OF SAID BED UNTIL THE MAJORITY OF THE CATALYST OF SAID RELATIVELY LARGER AVERAGE PARTICLE SIZE HAS BEEN REPLACED WITH SAID CATALYST OF RELATIVELY SMALLER PARTICLE SIZE, AND
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |