US3810898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coumarin-7-yloxy-alkyl piperazine compounds
Assignee: Roche Diagnostics GmbH
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Filing: 1972-04-19
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Granted: 1974-05-14
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Expires: 1992-04-19
Abstract
Abstract CERTAIN NOVEL 4-(W-(COUMARIN-7-YLOXY)-ALKYL)-PIPERAZINE COMPOUNDS OF THE FORMULA: 3-R1,4-R2,7-((4-R3-PIPERAZINO)-(CH2)N-O-)-2H-CHROMEN-2-ONE WHEREIN R1 IS HYDROGEN ATOM OR A LOWER ALKYL; R2 IS LOWER ALKYL; R3 IS AN UNSUBSTITUTED OR SUBSTITUTED PHENYL OR BENZYL RADICAL, THE SUBSTITUENTS, WHEN PRESENT, BEING HALOGEN OR LOWER ALKYL OR ALKOXY GROUPS, AND N IS 1, 2 OR 3, AND THE PHARMACOLOGICALLY COMPATIBLE SALTS THEREOF; HAVE OUTSTANDING ANTI-OEDEMATOUS ACTIVITY AND REDUCE INCREASED CAPILLARY PERMEABILITY.
Inventors
- 👤 Ernst-Christian Witte
- 👤 Kurt Stach
- 👤 Max Thiel
- 👤 Androniki Roesch
- 👤 Egon Roesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:40
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/06; C07D311/08; C07D311/16; A; A61; A61P; A61P29/00; A61P3/00; A61P37/00; A61P37/08
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 |