US3254121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bromination of salicylanilide
Assignee: Dow Chemical Co
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Filing: 1964-08-04
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Granted: 1966-05-31
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Expires: 1984-08-04
Abstract
No abstract record available.
Inventors
- 👤 Theodore E Majewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:28
CPC Classifications
C; C07; C07C; C07C233/00; C07C233/01; C07C233/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN A METHOD OF PRODUCING A BROMINATION PRODUCT COMPRISING PREDOMINANTLY 3,4'',5-TRIBOMOSASLICYLAMIDE WHICH INCLUDES THE STEPS OF REACTING SALICYLANILIDE WITH BROMINE IN A REACTION MEDIUM, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF EFFECTING THE REACTION WITH FROM ABOUT 2 1/2 TO ABOUT 3 1/2 MOLECULAR PROPORTIONS OF BROMINE PER MOLECULAR PROPORTION OF SALICYLANILIDE IN A REACTION MEDIUM CONSISTING ESSENTIALLY OF FROM 35 TO 80 PERCENT P-DIOXANE AND CORRESPONDINGLY FROM 65 TO 20 PERCENT WATER, AND THEREAFTER SEPARATING AT THE BROMINATION PRODUCT A MIXTURE CONTAINING PREDOMINANTLY 3,4'',5-TRIBROMOSALICYLANILIDE AND NOT GREATER THAN 1 PERCENT BY WEIGHT OF 4'',5-DIBROMOSALICYLANILIDE.
Claim 2
Dependent Claim
95 words
IN A METHOD OF PRODUCING A BROMINATION PRODUCT COMPRISING PREDOMINANTLY 3,4'',5-TRIBOMOSASLICYLAMIDE WHICH INCLUDES THE STEPS OF REACTING SALICYLANILIDE WITH BROMINE IN A REACTION MEDIUM, THE IMPROVEMENT WHICH COMPRISES THE STEPS OF EFFECTING THE REACTION WITH FROM ABOUT 2 1/2 TO ABOUT 3 1/2 MOLECULAR PROPORTIONS OF BROMINE PER MOLECULAR PROPORTION OF SALICYLANILIDE IN A REACTION MEDIUM CONSISTING ESSENTIALLY OF FROM 35 TO 80 PERCENT P-DIOXANE AND CORRESPONDINGLY FROM 65 TO 20 PERCENT WATER, AND THEREAFTER SEPARATING AT THE BROMINATION PRODUCT A MIXTURE CONTAINING PREDOMINANTLY 3,4'',5-TRIBROMOSALICYLANILIDE AND NOT GREATER THAN 1 PERCENT BY WEIGHT OF 4'',5-DIBROMOSALICYLANILIDE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |