US3579309A
Expired / Lapsed
US
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Column for carrying out organic chemical reactions in contact with fine,particulate catalysts
Assignee: Knapsack AG
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Filing: 1968-10-07
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Granted: 1971-05-18
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Expires: 1988-10-07
Abstract
Abstract COLUMN FOR CARRYING OUT ORGANIC CHEMICAL REACTIONS IN CONTACT WITH FINE, PARTICULATE CATALYST, THE COLUMN BEING FORMED WITH INTERCHANAGEABLE, CATALYST-RECEIVING REACTION VESSELS, WHICH ARE ARRANGED OUTSIDE THE COLUMN, PERFERABLY IN STAGGERED RELATIONSHIP TO EACH OTHER, BETWEEN INDIVIDUAL COLUMN TRAY OUTLET AND INLET OPENINGS PROJECTING OUTWARDLY.
Inventors
- 👤 Kurt Sennewald
- 👤 Klaus Gehrmann
- 👤 Stefan Schafer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:18
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/02; B01J8/04; B01D; B01D3/00; B01D3/009; B01D3/14; B01D3/16; B01D3/18; B01D3/20; C; C07; C07C; C07C67/00; C07C67/08; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00106; B01J2208/00168; B01J2208/00212; B01J2208/00247; B01J2208/0053; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y10; Y10S; Y10S203/00; Y10S203/06
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |