US4013672A
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US
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2,5,7,8-Tetrahydro-1,2,4,5,6-pentaazabenzo[6,7]-cyclohepta[1,2,3-cd]-as-indacenes
Assignee: ER Squibb and Sons LLC
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Filing: 1976-03-15
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Granted: 1977-03-22
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Expires: 1996-03-15
Abstract
Abstract New derivatives of 2,5,7,8-tetrahydro-1,2,4,5,6-pentaazabenzo[6,7]cyclohepta[1,2,3-cd]-as-indacenes have the general formula ##STR1## They are useful as psychotropic agents.
Inventors
- 👤 Hans Hoehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:15
CPC Classifications
C; C07; C07D; C07D471/00; C07D471/02; C07D471/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
A compound of the formula ##STR9## wherein R 1 is hydrogen, lower alkyl or hydroxy-lower alkyl; R 2 and R 3 each is hydrogen, lower alkyl or phenyl; and acid addition salts thereof.
Claim 2
Dependent Claim
33 words
A compound of the formula ##STR9## wherein R 1 is hydrogen, lower alkyl or hydroxy-lower alkyl; R 2 and R 3 each is hydrogen, lower alkyl or phenyl; and acid addition salts thereof.
Claim 3
Dependent Claim
11 words
A compound as in claim 1 wherein R 2 is hydrogen.
Claim 4
Dependent Claim
12 words
A compound as in claim 1 wherein R 3 is lower alkyl.
Claim 5
Dependent Claim
11 words
A compound as in claim 1 wherein R 1 is hydrogen.
Claim 6
Dependent Claim
12 words
A compound as in claim 1 wherein R 1 is lower alkyl.
Claim 7
Dependent Claim
12 words
A compound as in claim 1 wherein R 1 is hydroxy-lower alkyl.
Claim 8
Dependent Claim
26 words
A compound as in claim 1 wherein R 1 is hydrogen, lower alkyl or hydroxy-lower alkyl; R 2 is hydrogen; and R 3 is lower alkyl.
Claim 9
Dependent Claim
16 words
A compound as in claim 2 wherein R 1 is hydrogen and R 3 is ethyl.
Claim 10
Dependent Claim
16 words
A compound as in claim 2 wherein R 1 is methyl and R 3 is ethyl.
Claim 11
Dependent Claim
16 words
A compound as in claim 2 wherein R 1 is 2-hydroxy-ethyl and R 3 is ethyl.
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) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |