US2269163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dehydrating aliphatic acids by a combined extraction-distillation method
Assignee: TENNESSEE EASTMAN Corp
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Filing: 1938-04-07
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Granted: 1942-01-06
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Expires: 1958-04-07
Abstract
No abstract record available.
Inventors
- 👤 Donald F Othmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:01
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0488; C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44; C07C51/46
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) | 1945-01-05 | 1945-07-07 | 1946-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-01-05 | 1949-07-07 | 1950-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-01-05 | 1953-07-07 | 1954-01-06 | $7700.00 | Window Closed / Lapsed |