Patent FR2575793A1 successfully refreshed from Google Patents.
US3372555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for impurity removal from hydrogen-containing gases
Assignee: Linde GmbH
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Filing: 1964-08-14
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Granted: 1968-03-12
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Expires: 1984-08-14
Abstract
No abstract record available.
Inventors
- 👤 Becker Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0223; F25J3/0219; F25J3/0228; F25J3/0276; F25J2205/00; F25J2205/02; F25J2205/04; F25J2205/24; F25J2205/30; F25J2210/00; F25J2210/14; F25J2210/42; F25J2235/00; F25J2235/42; F25J2245/00; F25J2245/42; F25J2270/00; F25J2270/04; Y; Y10; Y10S; Y10S62/00; Y10S62/931; Y10S62/932
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A LOW TEMPERATURE PROCESS FOR THE FRACTIONATION OF HYDROGEN-CONTAINING GASES COMPRISING SUBSTANTIAL QUANTITIES OF HYDROGEN, METHANE, AND HIGH BOILING GASES HAVING MELTING POINTS HIGHER THAN THE BOILING POINT OF METHANE, IN AN INSTALLATION CONTAINING AT LEAST THREE CYCLICALLY REVERSIBLE REGENERATORS EACH OF WHICH PASSES SUCCESSIVELY THROUGH A WARMING, A SCAVENGING AND A COOLING PERIOD WHEREBY THE HYDROGEN-CONTAINING GAS IN THE WARMING PERIOD OF THE REGENERATOR IS FRACTIONATED INTO TWO FRACTIONS, ONE OF WHICH, THE GASEOUS FRACTION, IS DIVIDED INTO TWO PARTIAL CURRENTS, ONE OF WHICH IS PASSED THROUGH A REGENERATOR IN THE COOLING PERIOD AND IS THEN RECOMBINED WITH THE OTHER PARTIAL CURRENT, WHICH COMPRISES COOLING THE HYDROGEN-
Claim 2
Dependent Claim
108 words
A LOW TEMPERATURE PROCESS FOR THE FRACTIONATION OF HYDROGEN-CONTAINING GASES COMPRISING SUBSTANTIAL QUANTITIES OF HYDROGEN, METHANE, AND HIGH BOILING GASES HAVING MELTING POINTS HIGHER THAN THE BOILING POINT OF METHANE, IN AN INSTALLATION CONTAINING AT LEAST THREE CYCLICALLY REVERSIBLE REGENERATORS EACH OF WHICH PASSES SUCCESSIVELY THROUGH A WARMING, A SCAVENGING AND A COOLING PERIOD WHEREBY THE HYDROGEN-CONTAINING GAS IN THE WARMING PERIOD OF THE REGENERATOR IS FRACTIONATED INTO TWO FRACTIONS, ONE OF WHICH, THE GASEOUS FRACTION, IS DIVIDED INTO TWO PARTIAL CURRENTS, ONE OF WHICH IS PASSED THROUGH A REGENERATOR IN THE COOLING PERIOD AND IS THEN RECOMBINED WITH THE OTHER PARTIAL CURRENT, WHICH COMPRISES COOLING THE HYDROGEN-
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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) | 1971-03-12 | 1971-09-11 | 1972-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-12 | 1975-09-11 | 1976-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-12 | 1979-09-11 | 1980-03-12 | $7700.00 | Window Closed / Lapsed |