US3471506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing 5-chloro-2,3-pyridine diol
Assignee: Novartis Corp
•
Filing: 1967-08-28
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Granted: 1969-10-07
•
Expires: 1987-08-28
Abstract
No abstract record available.
Inventors
- 👤 Jorgen C C Lei
- 👤 Niels Clauson-Kaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:42
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2583425A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |