US3592606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system
Assignee: Universal Oil Products Co
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Filing: 1968-09-11
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Granted: 1971-07-13
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Expires: 1988-09-11
Abstract
Abstract CONTROL SYSTEM FOR A HYDROCRACKING REACTION ZONE OPERATING BY TEMPERATURE CONTROL ON THE FEED INLET, RESET BY TEMPERATURE DIFFERENTIAL ACROSS THE CATALYST BEDS. THE DESIRED TEMPERATURE DIFFERENTIAL IS DETERMINED BY A COMBINATION FRACTIONATOR-LEVEL CONTROL SIGNAL AND GAS MAKE FLOW CONTROL SIGNAL.
Inventors
- 👤 David M Boyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:38
CPC Classifications
G; G05; G05D; G05D27/00; G05D27/02; B; B01; B01J; B01J8/00; B01J8/001; C; C10; C10G; C10G35/00; C10G35/24; C10G49/00; C10G49/26; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582; Y10; Y10S; Y10S208/00; Y10S208/01
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |