US2735744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for controlling
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
•
Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:04
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1809; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00115; B01J2208/00132; B01J2208/00141; B01J2208/00168; B01J2208/00194; B01J2208/00265; B01J2208/00274; B01J2208/0061
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN A PROCESS WHEEREIN CATALYST IS CIRCULATED BETWEEN A REACTOR AND A REGENERATOR AND A DENSE FLUIDIZED BED OF CATALYST IS MAINTAINED IN SAID REGENERATOR FORM WHICH A CERTAIN AMOUNT OF HEAT IS REMOVED BY CONTACT WITH INDIRECT HEAT EXCHANGE SURFACES, THE IMPROVEMENT WHICH COMPRISES CHANGING THE LEVEL OF THE DENSE FLUIDIZED BED IN SAID REGENERATOR TO CONTACT VARYING AMOUNTS OF INDIRECT HEAT
Claim 2
Dependent Claim
63 words
IN A PROCESS WHEEREIN CATALYST IS CIRCULATED BETWEEN A REACTOR AND A REGENERATOR AND A DENSE FLUIDIZED BED OF CATALYST IS MAINTAINED IN SAID REGENERATOR FORM WHICH A CERTAIN AMOUNT OF HEAT IS REMOVED BY CONTACT WITH INDIRECT HEAT EXCHANGE SURFACES, THE IMPROVEMENT WHICH COMPRISES CHANGING THE LEVEL OF THE DENSE FLUIDIZED BED IN SAID REGENERATOR TO CONTACT VARYING AMOUNTS OF INDIRECT HEAT
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
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Cited
US2488406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |