US3427324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of chromone-2-carboxylic acid
Assignee: Fisons Pharmaceuticals Ltd
•
Filing: 1967-01-16
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Granted: 1969-02-11
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Expires: 1987-01-16
Abstract
No abstract record available.
Inventors
- 👤 Colin Fitzmaurice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:45
CPC Classifications
C; C07; C07D; C07D407/00; C07D407/02; C07D407/12; C07C; C07C45/00; C07C45/61; C07C45/63; C07C45/67; C07C45/673; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/76; C07C49/82; C07C49/825; C07C49/84; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/24; C07D493/00; C07D493/02; C07D493/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR980302A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-11 | 1972-08-12 | 1973-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-11 | 1976-08-12 | 1977-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-11 | 1980-08-12 | 1981-02-11 | $7700.00 | Window Closed / Lapsed |