US4076715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
13-Bromo lysergic acid compounds
Assignee: Sandoz AG
•
Filing: 1975-05-23
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Granted: 1978-02-28
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Expires: 1995-05-23
Abstract
Abstract The present invention concerns novel 13-bromo-lysergic acid compounds of formula I: ##STR1## wherein R 2 is isopropyl, 1 or 2-methylpropyl or benzyl, useful as agents for the treatment of cerebral insufficiency.
Inventors
- 👤 Theodor Fehr
- 👤 Hartmut Hauth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:15
CPC Classifications
C; C07; C07D; C07D457/00; C07D457/04; C07D519/00; C07D519/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
18 words
A compound of the formula, ##STR10## wherein R' is alkyl of 1 to 6 carbon atoms or hydrogen.
Claim 2
Dependent Claim
18 words
A compound of the formula, ##STR10## wherein R' is alkyl of 1 to 6 carbon atoms or hydrogen.
Claim 3
Dependent Claim
9 words
A compound of claim 1, wherein R' is alkyl.
Claim 4
Dependent Claim
9 words
A compound of claim 1, wherein R' is methyl.
Claim 5
Dependent Claim
9 words
A compound of claim 1, wherein R' is hydrogen.
Claim 6
Dependent Claim
11 words
A compound of claim 1, which is 13-bromo-9,10-dihydrolysergic acid methyl ester.
Claim 7
Dependent Claim
9 words
A compound of claim 1, which is 13-bromo-9,10-dihydrolysergic acid.
References Cited (Backward Citations)
US3904634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-27 | 1981-08-29 | 1982-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-27 | 1985-08-29 | 1986-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-27 | 1989-08-29 | 1990-02-28 | $7700.00 | Window Closed / Lapsed |