US2049486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of dimethyl and trimethylamines by distillation
Assignee: EIDP Inc
•
Filing: 1933-04-19
•
Granted: 1936-08-04
•
Expires: 1953-04-19
Abstract
No abstract record available.
Inventors
- 👤 Babcock Dale Friend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:04
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/80; Y; Y10; Y10S; Y10S159/00; Y10S159/29; Y10S203/00; Y10S203/23
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) | 1939-08-04 | 1940-02-03 | 1940-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1943-08-04 | 1944-02-03 | 1944-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1947-08-04 | 1948-02-03 | 1948-08-04 | $7700.00 | Window Closed / Lapsed |