US2900799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reflux condensers
Assignee: Air Liquide SA
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Filing: 1956-02-20
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Granted: 1959-08-25
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 Etienne Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:37
CPC Classifications
B; B01; B01D; B01D5/00; B01D5/0057; B01D5/006; B01D5/0066; F; F25; F25J; F25J3/00; F25J3/02; F25J3/0204; F25J3/0219; F25J3/0228; F25J3/0233; F25J3/0238; F25J5/00; F25J5/002; F25J5/007; F25J2200/00; F25J2200/80; F25J2210/00; F25J2210/14; F25J2215/00; F25J2215/62; Y; Y10; Y10S; Y10S62/00; Y10S62/902; Y10S62/905
Claims Analysis
Total Claims: 0
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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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |