Patent US3414587A successfully refreshed from Google Patents.
US3414587A
Expired / Lapsed
US
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4-(1, 2, 3, 4, 5, 6, 7, 8-octahydro-1, 8-dioxo-9-xanthenyl)-benzene-sulfonamide and derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1965-11-09
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Granted: 1968-12-03
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Expires: 1985-11-09
Abstract
No abstract record available.
Inventors
- 👤 Lehr Hanns Hanina
- 👤 Mitrovic Milan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:18
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86; C07D219/00; C07D219/04; C07D219/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3022316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |