US3491097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
3-(piperazinoalkyl)-pyrazoles
Assignee: Merck KGaA
•
Filing: 1967-06-20
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Granted: 1970-01-20
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Expires: 1987-06-20
Abstract
No abstract record available.
Inventors
- 👤 Volker Koppe
- 👤 Karl Schulte
- 👤 Siegmund Sommer
- 👤 Helmut Muller-Calgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:21
CPC Classifications
C; C07; C07D; C07D403/00; C07D403/02; C07D403/06; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/495
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-19 | 1973-07-21 | 1974-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-19 | 1977-07-21 | 1978-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-19 | 1981-07-21 | 1982-01-20 | $7700.00 | Window Closed / Lapsed |