US3404153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 7-[mono-or di-(acyloxy)-methyl]-4-hydroxy-1, 8-naphthyridines and derivatives thereof
Assignee: STWB Inc
•
Filing: 1965-01-26
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Granted: 1968-10-01
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Expires: 1985-01-26
Abstract
No abstract record available.
Inventors
- 👤 George Y Lesher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:19
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
3 words
A LOWER-ALKYL 7-(DI-(LOWER-ALKANOYLOXY)METHYL)-4HYDROXY-1,8-NAPHTHYRIDINE-3-CARBOXYLATE.
Claim 2
Dependent Claim
3 words
A LOWER-ALKYL 7-(DI-(LOWER-ALKANOYLOXY)METHYL)-4HYDROXY-1,8-NAPHTHYRIDINE-3-CARBOXYLATE.
References Cited (Backward Citations)
US3149104A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-01 | 1972-04-01 | 1972-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-01 | 1976-04-01 | 1976-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-01 | 1980-04-01 | 1980-10-01 | $7700.00 | Window Closed / Lapsed |