US4145350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclic sulphur compounds triazolyl substituted phenoxathin 10, 10 dioxides
Assignee: SmithKline Beecham Corp
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Filing: 1977-02-22
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Granted: 1979-03-20
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Expires: 1997-02-22
Abstract
Abstract Certain tricyclic sulphone compounds each of which is substituted in the 1-, 2-, 3- or 4-position by a carboxyl or (5-tetrazolyl) group and each of which is optionally substituted in the 5-, 6-, 7- or 8-position by a second carboxyl or (5-tetrazolyl) group or a substituent selected from cyano, halogen, nitro, alkyl, alkoxy, acyl, amino, acylamino, thioalkyl, alkylsulphinyl and alkylsulphonyl, as well as salts, and optionally substituted esters and amides of the carboxyl substituted compounds and alkyl derivatives of the tetrazolyl substituted compounds, are useful for the relief or prophylaxis of allergic conditions.
Inventors
- 👤 Harold F. Hodson
- 👤 John F. Batchelor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:19
CPC Classifications
C; C07; C07D; C07D257/00; C07D257/02; C07D257/04; C07C; C07C317/00; C07C317/44; C07C323/00; C07C323/50; C07C323/62; C07D333/00; C07D333/50; C07D333/76
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
11 words
2-(5-tetrazolyl) phenoxathiin-10, 10-dioxide or a pharmaceutically acceptable alkali metal salt thereof.
Claim 2
Dependent Claim
11 words
2-(5-tetrazolyl) phenoxathiin-10, 10-dioxide or a pharmaceutically acceptable alkali metal salt thereof.
Claim 3
Dependent Claim
5 words
2- 5-tetrazolyl) phenoxathiin-10,10-dioxide sodium salt.
Claim 4
Dependent Claim
5 words
2- 5-tetrazolyl) phenoxathiin-10,10-dioxide sodium salt.
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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |