Patent US3755335A successfully refreshed from Google Patents.
US3755335A
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CERTAIN 1,2,3,5,6,12,13a-OCTAHYDRO-12-OXO-{8 3,2,1-d,e{9 PYRIDO-{8 1,5{9 -NAPHTHYRIDINES
Assignee: Bpifrance Financement SA
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Filing: 1971-03-17
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Granted: 1973-08-28
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Expires: 1991-03-17
Abstract
Abstract The invention relates to new indole derivatives which are useful therapeutical agents. Said new derivatives are 1,2,3,5,6,12,13,13a-octahydro-12-oxo(3,2,1-d,e)-indolo-(3,2,1-i,j)-pyrido -(1,5)-naphthyridines having the general formula IN WHICH R1 and R2, which may be the same or different, are selected from H, OH and OCH3, and R3 is selected from H, Cl, Br and -COCO2C2H5.
Inventors
- 👤 H Husson
- 👤 C Thal
- 👤 P Potier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:56
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/12; C07D471/14; C07D461/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
9 words
( + or - )-1,2,3,5,6,12,13a-octahydro-12-oxo-13-ethoxalyl-(3, 2,1-d,e)-indolo-(3,2,1-i,j)-pyrido-(1,5)-naphthyridine, having the formula:
Claim 2
Dependent Claim
8 words
( + or - )-1,2,3,5,6,12,13,13a-octahydro-12-oxo-(3,2,1-d,e)-indolo-(3,2,1-i,j)-pyrido-(1,5)-naphthyridine, having the formUla:
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |