US2709348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of and apparatus for separating gas mixtures
Assignee: Union Carbide Corp
•
Filing: 1949-05-20
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Granted: 1955-05-31
•
Expires: 1969-05-20
Abstract
No abstract record available.
Inventors
- 👤 Edward F Yendall
- 👤 George H Zenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:41
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS FOR SEPARATING A GAS MIXTURE COMPRISING LOWER- AND HIGHER-BOILING-POINT COMPONENTS AND CONTAINING IMPURITIES HAVING HIGHER CONDENSING TEMPERATURES WHICH PROCESS COMPRISES PROVIDING A STREAM OF THE MIXTURE AT A CONDENSATION PRESSURE BELOW ABOUT 100 P.S.I., FREED OF MOISTURE, AND COOLED TO A LOW TEMPERATURE; SCRUBBING SUCH STREAM WITH A SCRUBBER LIQUID TO REMOVE IMPURITIES THEREFROM, SUCH IMPURITIES BEING THEN CONTAINED IN THE SCRUBBER LIQUID; SUBJECTING SUCH CLEANED STREAM TO PARTIAL LIQUEFACTION TO PRODUCE SCRUBBER LIQUID; SUBJECTING THE BALANCE OF SAID STREAM TO ANOTHER PARTIAL LIQUEFACTION TO PROVIDE A SECOND LIQUID FRACTION AND AN
Claim 2
Dependent Claim
94 words
A PROCESS FOR SEPARATING A GAS MIXTURE COMPRISING LOWER- AND HIGHER-BOILING-POINT COMPONENTS AND CONTAINING IMPURITIES HAVING HIGHER CONDENSING TEMPERATURES WHICH PROCESS COMPRISES PROVIDING A STREAM OF THE MIXTURE AT A CONDENSATION PRESSURE BELOW ABOUT 100 P.S.I., FREED OF MOISTURE, AND COOLED TO A LOW TEMPERATURE; SCRUBBING SUCH STREAM WITH A SCRUBBER LIQUID TO REMOVE IMPURITIES THEREFROM, SUCH IMPURITIES BEING THEN CONTAINED IN THE SCRUBBER LIQUID; SUBJECTING SUCH CLEANED STREAM TO PARTIAL LIQUEFACTION TO PRODUCE SCRUBBER LIQUID; SUBJECTING THE BALANCE OF SAID STREAM TO ANOTHER PARTIAL LIQUEFACTION TO PROVIDE A SECOND LIQUID FRACTION AND AN
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |