US2819951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the regeneration of catalyst
Assignee: Shell Development Co
•
Filing: 1955-02-23
•
Granted: 1958-01-14
•
Expires: 1975-02-23
Abstract
No abstract record available.
Inventors
- 👤 William V Medlin
- 👤 George E Liedholm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:21
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/26; B01J8/28; B01J38/00; B01J38/04; B01J38/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
APPARATUS FOR THE REGENERATION OF CATALYST CONTAINING COMBUSTIBLE CARBONACEOUS DEPOSITS BY BURNING THE COMBUSTIBLE CARBONACEOUS DEPOSITS THEREFROM WHICH COMPRISES A VERTICALLY ARRANGED APPARATUS HAVING TWO INTERCONNECTING ZONES, NAMELY, AN UPPER COOLING ZONE ADAPTED TO CONTAIN A BED OF FLUIDIZED CATALYST AND A LOWER BURNING ZONE ADAPTED TO CONTAIN A SECOND BED OF FLUIDIZED CATALYST A GRID BETWEEN SAID LOWER AND UPPER ZONES ARRANGED TO DISTRIBUTE SPENT REGENERATION GAS FROM SAID LOWER ZONE OVER THE HORIZONTAL CROSS SECTION OF SAID UPPER ZONE, A ZONE OF RESTRICTED CROSS SECTION BETWEEN SAID UPPER AND LOWER ZONES AND BELOW SAID GRID, A CONDUIT PROVIDED WITH A CONTROL VALVE INTERCONNECTING SAID TWO ZONES AND ARRANGED TO INSURE PASSAGE OF FLUIDIZED CATALYST FROM THE
Claim 2
Dependent Claim
118 words
APPARATUS FOR THE REGENERATION OF CATALYST CONTAINING COMBUSTIBLE CARBONACEOUS DEPOSITS BY BURNING THE COMBUSTIBLE CARBONACEOUS DEPOSITS THEREFROM WHICH COMPRISES A VERTICALLY ARRANGED APPARATUS HAVING TWO INTERCONNECTING ZONES, NAMELY, AN UPPER COOLING ZONE ADAPTED TO CONTAIN A BED OF FLUIDIZED CATALYST AND A LOWER BURNING ZONE ADAPTED TO CONTAIN A SECOND BED OF FLUIDIZED CATALYST A GRID BETWEEN SAID LOWER AND UPPER ZONES ARRANGED TO DISTRIBUTE SPENT REGENERATION GAS FROM SAID LOWER ZONE OVER THE HORIZONTAL CROSS SECTION OF SAID UPPER ZONE, A ZONE OF RESTRICTED CROSS SECTION BETWEEN SAID UPPER AND LOWER ZONES AND BELOW SAID GRID, A CONDUIT PROVIDED WITH A CONTROL VALVE INTERCONNECTING SAID TWO ZONES AND ARRANGED TO INSURE PASSAGE OF FLUIDIZED CATALYST FROM THE
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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) | 1961-01-13 | 1961-07-15 | 1962-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-13 | 1965-07-15 | 1966-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-13 | 1969-07-15 | 1970-01-14 | $7700.00 | Window Closed / Lapsed |