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US2690655A
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Process for liquefaction and separation of gases
Assignee: LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Filing: 1949-07-19
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Granted: 1954-10-05
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Expires: 1969-07-19
Abstract
No abstract record available.
Inventors
- 👤 Etienne Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:42
CPC Classifications
F; F25; F25J; F25J3/00; F25J3/02; F25J3/04; F25J5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1539450A
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US1626345A
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US2458894A
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US2518652A
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US2433604A
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US2552560A
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US2496380A
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US2530602A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |