Patent US2315930A successfully refreshed from Google Patents.
Patent US3759669A successfully refreshed from Google Patents.
US3759669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for contacting liquid and solid particles
Assignee: Shell USA Inc
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Filing: 1970-11-16
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Granted: 1973-09-18
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Expires: 1990-11-16
Abstract
Abstract AN APPARATUS AND A PROCESS WHEREIN A SOLID-LIQUID SLURRY IS CIRCULATED IN A VERTICAL REACTOR BY MEANS OF GAS LIFT ACTION IN A CENTRALLY LOCATED TUBE INSIDE THE REACTOR. ONE OR MORE HYDROCYCLONES ARE USED TO CLARIFY LIQUID PRODUCT LEAVING THE REACTOR AND TO RETURN SLURRY SOLIDS TO THE REACTOR. THE PROCESS IS PARTICULARLY DESIRABLE FOR CATALYTICALLY DESULFUIZING RESIDUAL OILS IN THE PRESENCE OF HYDROGEN.
Inventors
- 👤 S Aaron
- 👤 J Lemmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:14
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/02; C10G45/14; C10G45/16; B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/22; B01J8/224; B01J8/226
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |