US3842087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,8-naphthyridine compounds
Assignee: Organon Pharma UK Ltd
•
Filing: 1973-05-22
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Granted: 1974-10-15
•
Expires: 1993-05-22
Abstract
Abstract 1. A 1,8-NAPHTHYRIDIN-2(1H)-ONE-8-OXIDE HAVING STRUCTURE I: 2,8-(O=),5-R5,7-R7-1,2-DIHYDRONAPHTHYRIDINE<--> 2-(HO-), 5-R5,7-R7,8-(O=)-1,8-NAPHTHYRIDINE WHEREIN R5 REPRESENTS HYDROGEN, LOWER ALKYL, TRIFLUOROMETHYL, PENTAFLUOROETHYL, PHENYL, THIENYL OR NAPHTHYL; R7 REPRESENTS LOWER ALKYL, TRIFLUOROMETHYL OR PENTAFLUOROETHYL.
Inventors
- 👤 H Williams
- 👤 C Rooney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:06
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04; C07C; C07C45/00; C07C45/45; C07C45/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A 1,8-NAPHTHYRIDIN-2(1H)-ONE-8-OXIDE HAVING STRUCTURE I:
Claim 2
Dependent Claim
5 words
A 1,8-NAPHTHYRIDIN-2(1H)-ONE-8-OXIDE HAVING STRUCTURE I:
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |