US3729508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonylbenzoic acids
Assignee: Merck and Co Inc
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Filing: 1969-11-20
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Granted: 1973-04-24
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Expires: 1989-11-20
Abstract
Abstract SULFONYLBENZOIC ACID AND SALTS, ESTERS AND AMIDES THEREOF WHEREIN THE BENZENE RING MAY BE EITHER UNSUBSTITUTED OR SUBSTITUTED BY ONE OR MORE LOWER ALKYL, HALO, TRIHALOMETHYL, NITRO, HYDROXYAMINO, CARBOXY, AMMINO, HALOSULFONYL OR SULFAMOYL RADICALS. THE PRODUCTS ARE PREPARED BY TREATING A SUITABLE THIOBENZOIC ACID OR SULFINYLBENZOIC ACID WITH AN OXIDIZING AGENT AND ARE USEFUL AS URICOSURIC AGENTS IN THE TREATMENT OF GOUT AND GOUTY ARTHRISTIS.
Inventors
- 👤 C Ziegler
- 👤 J Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:31
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/70; C07C; C07C309/00; C07C317/00; C07C323/00; C07D207/00; C07D207/02; C07D207/04; C07D207/10; C07D207/12; C07D213/71; C07D307/00; C07D307/02; C07D307/34; C07D307/56; C07D307/64
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |