US3454577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-(1,2,3,4,5,6,7,8 - octahydro - 1,8 - dioxo-9-acridanyl) - benzenesulfonamide and derivatives
Assignee: F Hoffmann La Roche AG
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Filing: 1968-08-09
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Granted: 1969-07-08
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Expires: 1988-08-09
Abstract
No abstract record available.
Inventors
- 👤 Hanns H Lehr
- 👤 Milan Mitrovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:26
CPC Classifications
C; C07; C07D; C07D219/00; C07D219/04; C07D219/06; C07D311/00; C07D311/02; C07D311/78; C07D311/80; C07D311/82; C07D311/84; C07D311/86
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) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |