US3593968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rapid cooling for high-temperature gas streams
Assignee: Stone and Webster Engineering Corp
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Filing: 1968-09-26
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Granted: 1971-07-20
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Expires: 1988-09-26
Abstract
Abstract An improved method and apparatus for cooling a hot pyrolysis exit gas stream by flowing the gas stream downwardly through a quench zone, the walls of which are covered by a film of quench oil while spraying quench oil into the gas stream.
Inventors
- 👤 Ray L Geddes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:07
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/06; C; C10; C10G; C10G9/00; C10G9/002; F28D; F28D21/00; F28D2021/0019; F28D2021/0075; Y; Y10; Y10S; Y10S585/00; Y10S585/919; Y10S585/921
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
22 words
Apparatus as in claim 1 further comprising means for passing inert gas through the annular gap forming part of the insulation means.
References Cited (Backward Citations)
GB321473A
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US2353803A
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US2776727A
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US3069248A
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US2868856A
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US3219419A
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US3121616A
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US3451787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |