US3816470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organic salts of chromone-carboxylic-2acids
Assignee: Ferlux SA
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Filing: 1972-05-24
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Granted: 1974-06-11
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Expires: 1992-05-24
Abstract
Abstract PHARMACEUTACAL COMPOSITIONS WHICH COMPRISE THE ORGANIC SALTS AND DERIVATIVES OF CHROMONE-CARBOXYLIC2-ACIDS HAVING THE FOLLOWING FORMULA: 2-(HOOC-),R-4H-CHROMEN-4-ONE . R'' WHEREIN R MAY BE A HYDROGEN, A HALOGEN OR A HYDROXYL OR METHOXY GROUP AND R'' MAY BE AN ARGANIC BASE OR MORE SPECIFICALLY A SECONDARY AMINE.
Inventors
- 👤 P Tronche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:00
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/24
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |