US3824289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of tetrakis(dimethylamino)ethylene
Assignee: United States Department of the Navy
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Filing: 1971-10-21
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Granted: 1974-07-16
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Expires: 1991-10-21
Abstract
Abstract AN IMPROVED FOR THE MANUFACTURE OF TETRAKIS (DIMETHYLAMINO) ETHYLENE (TMAE),WHICH COMPRISES THE STEP OF REACTING CHLOROTRIFLUOROETHYLENE (CTFE) WITH DIMETHYLAMINE (DMA) WHEREIN THE REACTION IS PERFORMED BY THE UNDER SURFACE ADDITION OF CTFE IN AN EXCESS OF DMA AND WHEREIN CONCENSERS MAY BE USED TO HELP CONTROL THE DISSIPATION OF THE HEAT OF REACTION. THE INVENTION ALSO CONTEMPLATES A NEW AND USEFUL METHOD FOR SEPARATING AND RECOVERING EXCESS DMA.
Inventors
- 👤 T Liggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:28
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/08
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |