Patent US5933798A successfully refreshed from Google Patents.
Patent US3720709A successfully refreshed from Google Patents.
US3720709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonylphenoxyalkanoic acids
Assignee: Merck and Co Inc
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Filing: 1969-12-16
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Granted: 1973-03-13
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Expires: 1989-12-16
Abstract
Abstract (SULFONYLOPHENOXY) ALKANOIC ACIDS AND (MONO-OR DI-SUBSTITUTED SULFAMOYLPHENOXY) ALKANOIC ACIDS AND THE SALTS, ESTERS AND AMIDE DERIVATIVES WHEREIN THE BENZENE RING MAY BE SUBSTITUTED BY HALO, TRIHALOMETHYL, LOWER ALKYL, NITRO, CARBOXY OR A HYDROCARBYLENE MOIETHY. THE PRODUCTS ARE PREPARED BY EITHER OF TWO METHODS, ONE OF WHICH CONSISTS IN TREATING A (HALOSULFONYLPHENOXY) ALKANOIC ACID WITH A PRIMARY OR SECONDARY AMINE AND THE SECOND OF WHICH COMPRISES TREATING A (THIOPHENOXY) ALKANOIC ACID WITH A AXIDIZING AGENT. THE PRODUCTS ARE USEFUL AS URICOSURIC AGENTS IN THE TREATMENT OF GOUT AND GOUTY ARTHRITIS.
Inventors
- 👤 J Sprague
- 👤 C Ziegler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:36
CPC Classifications
C; C07; C07C; C07C317/00; C07C309/00; C07C323/00
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |