Patent US3718708A successfully refreshed from Google Patents.
US3718708A
Expired / Lapsed
US
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Method and apparatus for thermal cracking and quenching
Assignee: Mitsui Engineering and Shipbuilding Co Ltd
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Filing: 1970-07-16
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Granted: 1973-02-27
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Expires: 1990-07-16
Abstract
Abstract THERMAL CRACKING APPARATUS HAVING A LOWER PORTION COMPRISING A HEATING AND REACTION TOWER AND AN UPPER PORTION COMPRISING A QUENCHING TOWER. THE LOWER PORTION INCLUDES SPOUTING NOZZLES FOR DILUTION AGENTS WHICH CAUSE CIRCULATION OF THE MOLTEN MATERIAL IN THE TOWER, HEATING TUBES AND RAW MATERIAL INLET NOZZLES ALL ARRANGED TO BE SUBMERGED IN MOLTEN METAL. THE UPPER PORTION IS PROVIDED WITH QUENCHING THE TUBE BUNDLES WHICH ARE COVERED BY FLUIDIZEED SOLID GRAINS OR OILS OF HIGH BOILING POINT, THE MATERIAL BEING FLUIDIZED BY THE REACTION PROUDCTS AND DILUENTS WHICH ARE DISCHARGED FROM THE LOWER PORTION. D R A W I N G
Inventors
- 👤 S Suzuki
- 👤 T Ozawa
- 👤 M Uyeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:28
CPC Classifications
C; C10; C10G; C10G9/00; C10G9/34; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/95
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |