US3749155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exchange process
Assignee: GEORGES CLAUDE SA
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Filing: 1971-07-13
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Granted: 1973-07-31
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Expires: 1991-07-13
Abstract
Abstract An exchange process between a fluid which is to be heated and/or vaporized and circulating in a chamber, and an externally circulating liquid heating agent, in which the said chamber comprises means so that the speed of the fluid in the hot exchange zone is higher than that of the fluid in the cold zone. These means consist of a mandrel, of which the diameter becomes greater as the hot end is approached and is possibly formed of several sections of increasing diameters.
Inventors
- 👤 J Buffiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:35
CPC Classifications
F; F28; F28F; F28F13/00; F28F13/06; F28F13/08; F25; F25J; F25J5/00; F25J5/002; F25J5/005; F28D; F28D3/00; F28D3/02; F28F1/00; F28F1/10; F28F1/12; F28F1/14; F28F1/16; F28F1/42; F28F1/422; F28F13/14; F25J2250/00; F25J2250/30; F28D21/00; F28D2021/0019; F28D2021/0061; F28D2021/0064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A method for vaporizing a liquefied gas comprising: flowing a cold stream of the liquefied gas inside a vertical vaporization tube in an ascending direction; flowing a warm film of a heating liquid by gravity outside said vaporization tube, on the external surface thereof, in a descending direction, whereby there is heat exchanged between said cold stream and said warm film; and gradually increasing the speed of said cold stream as it ascends from the cold end to the warm end of said vaporization tube.
Claim 2
Independent Claim
85 words
A method for vaporizing a liquefied gas comprising: flowing a cold stream of the liquefied gas inside a vertical vaporization tube in an ascending direction; flowing a warm film of a heating liquid by gravity outside said vaporization tube, on the external surface thereof, in a descending direction, whereby there is heat exchanged between said cold stream and said warm film; and gradually increasing the speed of said cold stream as it ascends from the cold end to the warm end of said vaporization tube.
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) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |