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US3605423A
Expired / Lapsed
US
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Air rectification with multiple reboilers and condensers
Assignee: Individual
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Filing: 1968-05-28
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Granted: 1971-09-20
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Expires: 1988-05-28
Abstract
Abstract This invention relates to a method of fractional distillation in which a feed, preferably air, in introduced into a distillation column having distributed up its height a number of reboilers and condensers which are arranged so as to work the column approximately reversibly and obtain a liquid bottom fraction and a top gaseous fraction. At least a part of the gaseous top fraction and at least a part of the feed are used as the heating medium in reboilers, and at lease part of the liquid bottom fraction is used a s the cooling medium in at lease one condenser positioned above the highest reboiler.
Inventors
- 👤 Roman Stoklosinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:51
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/04248; F25J3/04333; F25J3/04351; F25J3/044; F25J3/04763; F25J3/04769; F25J3/04854; F25J3/0486; F25J2200/00; F25J2200/50; F25J2200/76; F25J2205/00; F25J2205/60; F25J2270/00; F25J2270/02; Y; Y10; Y10S; Y10S62/00; Y10S62/90
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |