US3594477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optically active pyridine derivatives in pharmaceutical compositions and their use as analgesics and stimulants
Assignee: Bayer AG
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Filing: 1969-01-14
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Granted: 1971-07-20
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Expires: 1989-01-14
Abstract
Abstract DEXTRO-ROTATORY AND LEVO-ROTATORY ISOMERS OF N-ACYL-N(2''-PYRIDYL)-1-PIPERIDINO-2-AMINOPROPANES OF THE FORMULA: 2-(PIPERIDINO-CH2-CH(-CH3)-N(-CO-R)-)PYRIDINE WHEREIN R IS METHYL OR ETHYL OR A PHARMACEUTICALLY ACCEPTABLE NON-TOXIC ACID SALT THEREOF EXHIBIT PHARMACEUTICAL PROPERTIES WHICH DIFFER QUALITATIVELY FROM THE RACEMATE. THE L-ISOMER EXHIBITS APPROXIMATELY THE SAME ANALGESIC ACTIVITY AS THE RACEMATE BUT ALSO EXHIBITS A STRONG SEDATIVE EFFECT. THE D-ISOMER EXHIBITS APPROXIMATELY THE SAME ANALGESIC ACTIVITY AS THE RACEMATE BUT EXHIBITS ALSO A CENTRAL NERVOUS SYSTEM STIMULANT EFFECT.
Inventors
- 👤 Hartmund Wollweber
- 👤 Rudolf Hiltmann
- 👤 Friedrich Hoffmeister
- 👤 Hans-Guenther Kroneberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/12; A; A61; A61K; A61K31/00; A61K31/33; A61K31/395; A61K31/435; A61K31/44
Claims Analysis
Total Claims: 0
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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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |