US3681319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amine addition salts of 5-(p-(2-pyridylsulfamyl)-phenylazo)-salicylic acid
Assignee: Pfizer Health AB
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Filing: 1970-01-30
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Granted: 1972-08-01
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Expires: 1990-01-30
Abstract
Abstract AMINE ADDITION SALTS OF 5-(P-(2-PYRIDYLSULFAMYL)-PHENYLAZO)-SALICYLIC ACID ARE PROVIDED. THE AMINE IS REPRESENTED BY THE FORMULA: A-R WHEREIN A IS EITHER -N(-R1)-R2 OR 4-MORPHOLINO, OR PIPERIDINO; AND WHEREIN R IS EITHER TRIS-HYDROXYMETHYL-METHYL, 2-HYDROXYETHYL, 2-HYDROXYPROPYL, 3-HYDROXYPROPYL, 2-METHOXYETHYL, 3,4,5,6-TETRAHYDROXYHEXANAL-2-YL, OR 2,3,4,5,6-PENTAHYDROXYHEXYL; AND R1 AND R2 ARE EITHER HYDROGEN, METHYL ETHYL, OR 2-HYDROXYETHYL. THE PRESENT COMPOUNDS CAN BE USED FOR THE TREATMENT OF ULCERATIVE COLITIS AND RHEUMATOID ARTHRITUS.
Inventors
- 👤 Bernt Jabes Lindberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:50
CPC Classifications
C; C09; C09B; C09B69/00; C09B69/02; C09B69/04; C09B69/045
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |