Patent US3457266A successfully refreshed from Google Patents.
US3457266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,2 dihydro 4-isoquinolones is provided
Assignee: F Hoffmann La Roche AG
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Filing: 1966-03-24
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Granted: 1969-07-22
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Expires: 1986-03-24
Abstract
No abstract record available.
Inventors
- 👤 John Thaddeus Gibas
- 👤 Hsi Lin Lee
- 👤 Wilhelm Wenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:11
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/22; C07D217/24
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |