US3776918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Halogeno-6-hydroxy-pyridone-(2)compounds
Assignee: Novartis AG
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Filing: 1971-08-11
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Granted: 1973-12-04
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Expires: 1991-08-11
Abstract
Abstract 3-HALOGENO-6-HYDROXY-PYRIDONE - (2) COMPOUNDS AND PROCESS FOR THEIR MANUFACTURE BY HALOGENATING THE CORRESPONDING 6-HYDROXY-PYRIDONE-(2) COMPOUNDS. VALUABLE STARING COMPOUNDS FOR THE MANUFACTURE OF DYESTUFFS.
Inventors
- 👤 G Hegar
- 👤 H Riat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:23
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/69; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626; C09B62/00; C09B62/002; C09B62/006; C09B62/0067; C09B62/02; C09B62/04; C09B62/08; C09B62/085
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |