US3910916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-(4-Methanesulfonyl phenacyl)-4-phenyl piperazine
Assignee: Spofa Vereinigte Pharma Werke
•
Filing: 1973-12-26
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Granted: 1975-10-07
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Expires: 1993-12-26
Abstract
Abstract Novel 1,4-disubstituted piperazine derivatives and their salts and methods of producing them, and use of said compounds as sedation agents.
Inventors
- 👤 Miroslav Protiva
- 👤 Zdenek Vejdelek
- 👤 Jan Metys
- 👤 Frantisek Hradil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:42
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
1-(4-METHANESULFONYLPJENACY)-4-PHENYLPIPERAZINE OR THE CORRESPONDING MALEATE.
Claim 2
Dependent Claim
5 words
1-(4-METHANESULFONYLPJENACY)-4-PHENYLPIPERAZINE OR THE CORRESPONDING MALEATE.
References Cited (Backward Citations)
US2636032A
Cited
US3170926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |