US3755444A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bromination of organic compounds with a bromine chloride dioxane complex
Assignee: Dow Chemical Co
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Filing: 1971-04-16
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Granted: 1973-08-28
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Expires: 1991-04-16
Abstract
Abstract A BROMINE CHLORIDE COMPLEX OF P-DIOXANE HAS BEEN DISCOVERED WHICH IS USEFUL AS A SOLID SOURCE OF BROMINE CHLORIDE. A DIOXANE-BROMINE CHLORIDE COMPLEX FORMED BY MIXING BROMINE CHLORIDE WITH DIOXANE IN METHYLENE CHLORIDE AT 10*C. HAS BEEN USED TO SELECTIVELY BROMINATE SALICYLANILIDE TO GIVE AN 88% YIELD OF 3,4'',5-TRIBROMOSALICYLANILIDE.
Inventors
- 👤 J Schneider
- 👤 J Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:55
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/12
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |