US3514464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-oxo-1,2,3,4-tetrahydro-5h-(1)benzopyrano(3,4-c)pyridines
Assignee: Arthur D Little Inc
•
Filing: 1967-05-29
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Granted: 1970-05-26
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Expires: 1987-05-29
Abstract
No abstract record available.
Inventors
- 👤 Harry G Pars
- 👤 Felix E Granchelli
- 👤 Raj K Razdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:22
CPC Classifications
C; C07; C07D; C07D491/00; C07D491/02; C07D491/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3429889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-25 | 1973-11-24 | 1974-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-25 | 1977-11-24 | 1978-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-25 | 1981-11-24 | 1982-05-26 | $7700.00 | Window Closed / Lapsed |