US3690841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Steam distributor for fluid catalytic cracker stripper
Assignee: DORRANCE P BUNN JR
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Filing: 1970-08-03
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Granted: 1972-09-12
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Expires: 1990-08-03
Abstract
Abstract A STEAM DISTRIBUTOR IS LOCATED IN THE CONIC DISCHARGE SECTION OF AN ANNULAR CATALYST STRIPPER IN A FLUID CATALYTIC CRACKER UNIT UPSTREAM OF THE RECYLCE FEED RISER ENTRY TO PROVIDE FOR IMPROVED FLOW CONTROL OF THE DISCHARGR OF THE SPENT CATALYST AND THE ADDITIONAL STRIPPING THEREOF.
Inventors
- 👤 Dorrance P Bunn Jr
- 👤 Werner L Hack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:55
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; C; C10; C10G; C10G11/00; C10G11/14; C10G11/18
Claims Analysis
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |