US2735822A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for contacting solids and gases
Assignee: —
•
Filing: —
•
Granted: 1956-02-21
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Expires: 1973-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/1845; B01J8/1863
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A CATALYTIC CONVERSION APPARATUS INCLUDING A CONVERSION CHAMBER AND A CATALYST REACTIVATION CHAMBER, AND A CLOSED CYCLIC CATALYST PATH THEREBETWEEN INCLUDING A VERTICAL CONDUIT, MEANS FOR PASSING CATALUST FROM ONE OF SAID CHAMBERS TO THE UPPER END OF SAID CONDUIT, MEANS FOR DISCHARGING THE CATALYST FROM THE LOWER END OF SAID CONDUIT TO THE OTHER OF SAID CHAMBERS, MEANS FOR INTRODUCING FLUIDIZING GAS INTO SAID CONDUIT TO FLUIDIZE THE CATALYST THEREIN, SAID CONDUIT BEING CONSTRUCTED TO FORM A FLUIDIZED COLUMN OF THE RECEIVED CATALYST AND TO MAINTAIN A REQUIRED PRESSURE DIFFERENTIAL BETWEEN SAID CHAMBERS BY SEALING EFFECT OF THE FLUIDIZED CATALYST COLUMN, AND A LEVEL CONTROL DEVICE RESPONSIVE TO FLUCTUATIONS IN THE LEVEL OF THE FLUIDIZED CATALYST COLUMN TO CONTROL SAID DISCHARGE OF
Claim 2
Dependent Claim
124 words
IN A CATALYTIC CONVERSION APPARATUS INCLUDING A CONVERSION CHAMBER AND A CATALYST REACTIVATION CHAMBER, AND A CLOSED CYCLIC CATALYST PATH THEREBETWEEN INCLUDING A VERTICAL CONDUIT, MEANS FOR PASSING CATALUST FROM ONE OF SAID CHAMBERS TO THE UPPER END OF SAID CONDUIT, MEANS FOR DISCHARGING THE CATALYST FROM THE LOWER END OF SAID CONDUIT TO THE OTHER OF SAID CHAMBERS, MEANS FOR INTRODUCING FLUIDIZING GAS INTO SAID CONDUIT TO FLUIDIZE THE CATALYST THEREIN, SAID CONDUIT BEING CONSTRUCTED TO FORM A FLUIDIZED COLUMN OF THE RECEIVED CATALYST AND TO MAINTAIN A REQUIRED PRESSURE DIFFERENTIAL BETWEEN SAID CHAMBERS BY SEALING EFFECT OF THE FLUIDIZED CATALYST COLUMN, AND A LEVEL CONTROL DEVICE RESPONSIVE TO FLUCTUATIONS IN THE LEVEL OF THE FLUIDIZED CATALYST COLUMN TO CONTROL SAID DISCHARGE OF
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) | 1959-02-20 | 1959-08-22 | 1960-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-20 | 1963-08-22 | 1964-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-20 | 1967-08-22 | 1968-02-21 | $7700.00 | Window Closed / Lapsed |