US2476391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractive distillation of propionaldehyde from acrolein
Assignee: Celanese Corp
•
Filing: 1947-08-01
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Granted: 1949-07-19
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Expires: 1967-08-01
Abstract
No abstract record available.
Inventors
- 👤 Stautzenberger Adin Lee
- 👤 Samuel B Jeffries
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:41
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/78; C07C45/81; C07C45/82; C07C45/83
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281243A
Cited
US2290636A
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US2339576A
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US2350256A
Cited
US2360861A
Cited
US2360859A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-07-18 | 1953-01-17 | 1953-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-07-18 | 1957-01-17 | 1957-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-07-18 | 1961-01-17 | 1961-07-19 | $7700.00 | Window Closed / Lapsed |