Patent US2256035A successfully refreshed from Google Patents.
US2293601A
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Process of production of mixtures of gases hard to liquefy
Assignee: Air Liquide SA
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Filing: 1940-06-12
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Granted: 1942-08-18
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Expires: 1960-06-12
Abstract
No abstract record available.
Inventors
- 👤 Etlenne Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:04
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/02; C01B3/025; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0223; F25J3/0228; F25J3/0271; F25J3/0276; F25J5/00; F25J5/002; F25J5/007; F25J2200/00; F25J2200/50; F25J2200/80; F25J2200/90; F25J2205/00; F25J2205/30; F25J2210/00; F25J2210/14; F25J2210/42; F25J2215/00; F25J2215/20; F25J2240/00; F25J2240/02; F25J2270/00; F25J2270/04; F25J2270/42; F25J2270/90; F25J2270/904; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905
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) | 1945-08-17 | 1946-02-16 | 1946-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-17 | 1950-02-16 | 1950-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-17 | 1954-02-16 | 1954-08-18 | $7700.00 | Window Closed / Lapsed |