Patent US2915880A successfully refreshed from Google Patents.
US2915880A
Expired / Lapsed
US
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Separation of gas mixtures
Assignee: BOC Group Ltd
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Filing: 1956-05-11
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Granted: 1959-12-08
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Expires: 1976-05-11
Abstract
No abstract record available.
Inventors
- 👤 Schuftan Paul Maurice
- 👤 Neill John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:21
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J3/044; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/908
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
THE METHOD OF SEPARATING A GAS MIXTURE INTO A LOWER BOILING POINT FRACTION AND A HIGHER BOILING POINT FRACTION WHICH COMPRISES COMPRESSING THE GAS MIXTURE, DIVIDING SAID COMPRESSING GAS MIXTURE INTO A MAJOR AND A MINOR STREAM, COMPRESSING SAID MINOR STREAM TO A PRESSURE SUBSTANTIALLY HIGHER THAN THAT OF SAID MAJOR STREAM, COOLING SAID COMPRESSED MINOR STREAM TO AMBIENT TEMPERATURED, AND REMOVING CONDENSIBLE IMPURITIES THEREFROM, ISENTROPICALLY EXPANDING THE WHOLE OF SAID MINOR STREAM, COOLING SAID MAJOR STREAM BY HEAT EXCHANGE WITH AT LEAST ONE OF THE COLD SEPARATION PRODUCTS, HEATING AT LEAST A PART OF SAID COOLED MAJOR STREAM BY HEAT EXCHANGE WITH SAID EXPANDED MINOR STREAM, EXPANDING SAID HEATED PART OF SAID MAJOR STREAM IN A TURBINE, SUBJECTING BOTH THE MAJOR AND THE MINOR STREAM TO RECTIFICATION IN A RECTIFICATION ZONE AND WITHDRAWING FROM SAID RECTIFICATION ZONE A LOWER BOILING POINT FRACTION AND A HIGHER BOILING POINT FRACTION.
Claim 2
Independent Claim
149 words
THE METHOD OF SEPARATING A GAS MIXTURE INTO A LOWER BOILING POINT FRACTION AND A HIGHER BOILING POINT FRACTION WHICH COMPRISES COMPRESSING THE GAS MIXTURE, DIVIDING SAID COMPRESSING GAS MIXTURE INTO A MAJOR AND A MINOR STREAM, COMPRESSING SAID MINOR STREAM TO A PRESSURE SUBSTANTIALLY HIGHER THAN THAT OF SAID MAJOR STREAM, COOLING SAID COMPRESSED MINOR STREAM TO AMBIENT TEMPERATURED, AND REMOVING CONDENSIBLE IMPURITIES THEREFROM, ISENTROPICALLY EXPANDING THE WHOLE OF SAID MINOR STREAM, COOLING SAID MAJOR STREAM BY HEAT EXCHANGE WITH AT LEAST ONE OF THE COLD SEPARATION PRODUCTS, HEATING AT LEAST A PART OF SAID COOLED MAJOR STREAM BY HEAT EXCHANGE WITH SAID EXPANDED MINOR STREAM, EXPANDING SAID HEATED PART OF SAID MAJOR STREAM IN A TURBINE, SUBJECTING BOTH THE MAJOR AND THE MINOR STREAM TO RECTIFICATION IN A RECTIFICATION ZONE AND WITHDRAWING FROM SAID RECTIFICATION ZONE A LOWER BOILING POINT FRACTION AND A HIGHER BOILING POINT FRACTION.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-12-07 | 1963-06-08 | 1963-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-12-07 | 1967-06-08 | 1967-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-12-07 | 1971-06-08 | 1971-12-08 | $7700.00 | Window Closed / Lapsed |