US3718655A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain diisoniazid methane sulfonate complexes
Assignee: Ferrer Internacional SA
•
Filing: 1970-07-28
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Granted: 1973-02-27
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Expires: 1990-07-28
Abstract
Abstract CONSTITUTING AN IMPROVED TUBERCULOSTATIC AGENT AND METHOD OF PREPARING THE SAME BY REACTING D(+)2,2''(ETHYLENEDIIMINO) DI-1BUTANOL AND ISONIAZID METHANE SULFONIC ACID. Di-isoniazidmethane sulfonate of d(+)2,2''(ethylenediimino)di-1butanol having the formula
Inventors
- 👤 Salat C Ferrer
- 👤 Batlles J Ferrer
- 👤 Riera J Colome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:01
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/86
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
9 words
Di-isoniazid methane sulphonate of d(+) 2, 2'' (ethylenediimino) di-1-butanol.
References Cited (Backward Citations)
US2923714A
Cited
US3236881A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |