US3584064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous manufacture of dibromobutenes
Assignee: BASF SE
•
Filing: 1967-02-08
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Granted: 1971-06-08
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Expires: 1987-02-08
Abstract
Abstract A PROCESS FOR THE CONTINUOUS PRODUCTION OF DIBROMOBUTENES BY THE REACTION OF BUTADIENE WITH BROMINE IN THE GAS PHASE, IN WHICH BUTADIENE IS USED IN MORE THAN DOUBLE THE STOICHIOMETRIC AMOUNT AND THE REACTANTS RE IN TURBULENT FLOW. DIBROMOBUTENES ARE INTERMEDIATES FOR POLYAMIDES OF THE NYLON-6,6 TYPE.
Inventors
- 👤 Hans-Martin Weitz
- 👤 Berthold Hausdoerfer
- 👤 Juergen Koopmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:17
CPC Classifications
B; B01; B01J; B01J10/00; C; C07; C07C; C07C17/00; C07C17/013; C07C17/02
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |