US3787409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2,4-diamino-5-(3-alkoxy-4,5-methylenedioxybenzyl)pyrimidine
Assignee: F Hoffmann La Roche AG
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Filing: 1971-12-01
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Granted: 1974-01-22
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Expires: 1991-12-01
Abstract
Abstract 2,4-DIAMINO-5-,(3-ALKOXY -4,5 - METHYLENEDIOXYBENZYL)PYRIMIDINES, PREPARED SUCH AS FOR EXAMPLE, 2,4-DIAMINO-5(3-METHOXY-4,5 - METHYLENEDIOXYBENZYL) PYRIMIDINE FROM THE CORRESPONDING BENZALDEHYDES, ARE DESCRIBED. THE END PRODUCTS ARE USEFUL AS POTENTITATORS OF THE ANTIBACTERIAL ACTIVITY OF SULFONAMIDES, AS WELL AS ANTIBIOTICS.
Inventors
- 👤 E Grunberg
- 👤 M Hoffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:25
CPC Classifications
C; C07; C07D; C07D317/00; C07D317/08; C07D317/44; C07D317/46; C07D317/48; C07D317/62; C07D317/64; B; B61; B61B; B61B12/00; B61B12/002; C07D317/50; C07D317/60
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |