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US3810894A
Expired / Lapsed
US
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Derivatives of pyrazolo(1,5-c)pyrimidines and process for their preparation
Assignee: Bayer AG
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Filing: 1971-11-24
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Granted: 1974-05-14
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Expires: 1991-11-24
Abstract
Abstract DERIVATIONS OF PYRAZOLO (1,5-C)PYRIMIDINES, WHICH IS A NEW HETEROCYCLIC NUCLEUS, POSESS ANTIMICROBIAL ACTIVITY, PARTICULARLY TRICHOMONOACIDAL AND AMOEIBICIDAL ACTION. THEY ARE PREPARED FROM A B-TRIKETON AND A SEMICARBAZIDE, THIOSEMICARBAZIDE OR AMINOGUANIDINE. A TYPICAL EMBODIMENT IS 6H - 7 - THIONO - 2,5-DIMETHYL PYRAZOLO''1,5-C) PYRIMIDINE.
Inventors
- 👤 E Kranz
- 👤 M Bock
- 👤 H Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:42
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/06; C07D487/04; C07D487/12; C07D487/14
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) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |