Patent US4169087A successfully refreshed from Google Patents.
US2979537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective bromination of benzene
Assignee: Dow Chemical Co
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Filing: 1959-02-04
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Granted: 1961-04-11
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Expires: 1979-02-04
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Asadorian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:26
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/10; C07C17/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
A PROCESS FOR THE PREPARTION OF 1,2,4,5-TETRABROMOBENZENE WHICH COMPRISES REACTING BENZENE WITH BROMIDE IN THE LIQUID PHASE IN THE PRESENCE OF A FERREIC BROMINATION CTALYST AND IN THE PRESENCE OF AN INERT ORGANIC SOLVENT CONSISTING ESSENTIALLY OF ONE SELECTED FROM THE GROUP CONSISTING OF CARBON TETRACHLORIDE AND CHLOROFORM.
Claim 2
Dependent Claim
48 words
A PROCESS FOR THE PREPARTION OF 1,2,4,5-TETRABROMOBENZENE WHICH COMPRISES REACTING BENZENE WITH BROMIDE IN THE LIQUID PHASE IN THE PRESENCE OF A FERREIC BROMINATION CTALYST AND IN THE PRESENCE OF AN INERT ORGANIC SOLVENT CONSISTING ESSENTIALLY OF ONE SELECTED FROM THE GROUP CONSISTING OF CARBON TETRACHLORIDE AND CHLOROFORM.
References Cited (Backward Citations)
US2452154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |