US3817872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclone separation method and apparatus
Assignee: Standard Oil Co
•
Filing: 1972-02-07
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Granted: 1974-06-18
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Expires: 1992-02-07
Abstract
Abstract DISCLOSED IS A METHOD AND APPARATUS FOR IMPROVING THE EFFICIENCY OF A GAS-SOLID SEPARATION SYSTEM. THE CONVENTIONAL SYSTEM CONTAINING A REGENERATION CHAMBER AND ONE OR MORE SETS OF CYCLONES LOCATED WITHIN THE CHAMBER IS IMPROVED BY PROVIDING EXTENSIVES GAS DISCHARGE TUBE "NECKIN" IN THE CYCLONES AND A FINAL-STAGE SOLIDS DISCHARGE TO AN EXTERNAL, LOW-PRESSURE LOW-COST SEPARATOR. THE INVENTION HAS PARTICULAR APPLICATION IN REDUCING DUST EMISSIONS FROM THE REGENERATOR OF A FLUID CATALYTIC CRACKING UNIT. D R A W I N G
Inventors
- 👤 R Evans
- 👤 Kinney C Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:17
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/18; C10G11/182; B; B01; B01J; B01J8/00; B01J8/005; B01J8/0055
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |