US3573200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst makeup
Assignee: Chevron USA Inc
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Filing: 1968-12-04
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Granted: 1971-03-30
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Expires: 1988-12-04
Abstract
Abstract CATALYST IS ADDED TO A BED OF CATALYST IN CONTROLLED AMOUNTS BY AN EASILY CONTROLLED SYSTEM USING, FOR EXAMPLE, MOTIVE AIR TO MOVE CONTROLLED AMOUNTS OF CATALYST THROUGH A CONDUIT AND THEN ONTO A BED OF CATALYST AT REGULATED INTERVALS. CATALYST FLOW IS STOPPED WHEN A CYCLE TIMER STOPS THE FLOW OF AIR TO THE CONDUIT BECAUSE THE CATALYST STAGNATES WHEN THE MASS OF CATALYST PARTICLES INTRODUCED TO THE CONDUIT (BY A STANDPIPE FROM FRESH CATALYST STORAGE) ASSUMES ITS ANGLE OF REPOSE.
Inventors
- 👤 Raymond P Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:38
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/14; C10G11/16; B; B01; B01J; B01J8/00; B01J8/0015; Y; Y10; Y10S; Y10S208/00; Y10S208/01
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |