US2535131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for brominating p-toluyl benzoic acid
Assignee: EIDP Inc
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Filing: 1949-11-17
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Granted: 1950-12-26
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Expires: 1969-11-17
Abstract
No abstract record available.
Inventors
- 👤 Gubelmann Ivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:02
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/347; C07C51/363
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
A PROCESS FOR PREPARING 3'' -BROMO-4'' -METHYL-2-BENZOYL BENZOIC ACID WHICH COMPRISES DISSOLVING P-TOLUYL BENZOIC ACID AS AN ALKALI METAL SALT IN A NON-ACID AQUEOUS SOLUTION IN WHICH A MIXTURE OF AN ALKALI METAL BROMIDE AND AN ALKALI METAL BROMATE IS DISSOLVED IN AN AMOUNT SUFFICIENT TO EFFECT MONOBROMINATION OF THE P-TOLUYL BENZOIC ACID WITH AN EXCESS OF FROM 20% TO 50%, SLOWLY ADDING THIS SOLUTION TO A DILUTE MINERAL ACID UNDER GOOD AGITATION AND AT SUCH A RATE AND TEMPERATURE THAT BROMINATION IS ESSENTIALLY COMPLETED AT THE TIME OF CONTACT OF THE SOLUTION WITH THE ACID.
Claim 2
Dependent Claim
96 words
A PROCESS FOR PREPARING 3'' -BROMO-4'' -METHYL-2-BENZOYL BENZOIC ACID WHICH COMPRISES DISSOLVING P-TOLUYL BENZOIC ACID AS AN ALKALI METAL SALT IN A NON-ACID AQUEOUS SOLUTION IN WHICH A MIXTURE OF AN ALKALI METAL BROMIDE AND AN ALKALI METAL BROMATE IS DISSOLVED IN AN AMOUNT SUFFICIENT TO EFFECT MONOBROMINATION OF THE P-TOLUYL BENZOIC ACID WITH AN EXCESS OF FROM 20% TO 50%, SLOWLY ADDING THIS SOLUTION TO A DILUTE MINERAL ACID UNDER GOOD AGITATION AND AT SUCH A RATE AND TEMPERATURE THAT BROMINATION IS ESSENTIALLY COMPLETED AT THE TIME OF CONTACT OF THE SOLUTION WITH THE ACID.
References Cited (Backward Citations)
DE540408C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-12-25 | 1954-06-26 | 1954-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-25 | 1958-06-26 | 1958-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-25 | 1962-06-26 | 1962-12-26 | $7700.00 | Window Closed / Lapsed |