Patent US3484445A successfully refreshed from Google Patents.
US3484445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of chromone-2-carboxylic acid
Assignee: Fisons Pharmaceuticals Ltd
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Filing: 1966-12-21
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Granted: 1969-12-16
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Expires: 1986-12-21
Abstract
No abstract record available.
Inventors
- 👤 Thomas Brian Lee
- 👤 Richard Templeton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:56
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/40; C07C59/58; C07C59/64; C07C59/66; C07C59/68; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/24
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) | 1972-12-15 | 1973-06-16 | 1973-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-15 | 1977-06-16 | 1977-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-15 | 1981-06-16 | 1981-12-16 | $7700.00 | Window Closed / Lapsed |