US3923780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(Substituted azobenzenesulfonamides as fasciolicides
Assignee: Merck and Co Inc
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Filing: 1973-10-23
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Granted: 1975-12-02
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Expires: 1993-10-23
Abstract
Abstract Novel substituted azobenzenesulfonamides are useful as agents for the treatment of both mature and immature liver fluke infections. The azobenzenesulfonamide is substituted on the benzene ring with halogen. The azo substituents are aromatic hdyrocarbons such as phenyl or naphthyl, aromatic heterocycles such as pyridine, triazole and quinoline, aliphatic heterocycles such as imidazoline and pyrimidine trione and aliphatic esters which in turn may be substituted with hydroxyl, amino, loweralkyl, carboxy, hydrazino, nitrile, or ureido. Compositions containing these compounds for the treatment of mature and immature liver fluke infections are also disclosed.
Inventors
- 👤 Robert E Harmon
- 👤 Helmut H Mrozik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:54
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/72; C07D213/76; C07D213/77; A; A23; A23K; A23K20/00; A23K20/10; A23K20/111; C07D215/00; C07D215/02; C07D215/16; C07D215/48; C07D231/00; C07D231/02; C07D231/10; C07D231/14; C07D231/44; C07D249/00; C07D249/02; C07D249/08; C07D249/10; C07D249/14
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
5 words
A COMPOUND HAVING THE FORMULA:
Claim 3
Dependent Claim
8 words
A compound of claim 1 which is 3,5-dibromo-4-(4-hydroxy-2-ureidophenylazo)-benzenesulfonamide.
References Cited (Backward Citations)
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US2231021A
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US2955901A
Cited
US3050516A
Cited
US3134766A
Cited
US3600377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |