US3859285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
10, 11-dihydro-5h-benzo (4,5) cyclohepta (1,2-b) pyrazines
Assignee: Individual
•
Filing: 1973-11-09
•
Granted: 1975-01-07
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Expires: 1993-11-09
Abstract
Abstract Substituted or unsubstituted 10,11-dihydro-5Hbenzo(4,5)cyclohepta(1,2-b) pyrazines, e.g. 10,11-dihydro-5Hbenzo(4,5)cyclohepta(1,2-b) pyrazine, are prepared by treating a 6-hydroxy-7H-benzocyclohepten-7-one with ethylenediamine, and are useful as sedative-hypnotic agents, minor tranquilizers and anticonvulsant agents.
Inventors
- 👤 Marcel K Eberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:47
CPC Classifications
C; C07; C07D; C07D241/00; C07D241/36; C07D241/38
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
9 words
A compound of claim 1 in free base form.
Claim 4
Dependent Claim
12 words
A compound according to claim 1 in which R1 represents lower alkyl.
Claim 5
Dependent Claim
10 words
The compound of claim 1 which is 10,11-dihydro-5H-benzo(4,5) cyclohepta(1,2-b) pyrazine.
Claim 6
Dependent Claim
9 words
The compound of claim 1 which is 10,11-dihydro-5-methyl-5H-benzo(4,5)cyclohepta((1,2-b) pyrazine.
References Cited (Backward Citations)
US3301863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |