Patent US2507408A successfully refreshed from Google Patents.
US2507408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1-alkylsulfonyl-4-alkyl piperazines
Assignee: Rhone Poulenc SA
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Filing: 1949-01-04
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Granted: 1950-05-09
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Expires: 1969-01-04
Abstract
No abstract record available.
Inventors
- 👤 Jacob Robert Michel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:31
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/22; C07D295/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
17 words
NEW THERAPEUTICALLY USEFUL COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES OF PIPERAZINE OF THE GENERAL FORMULA:
Claim 2
Dependent Claim
17 words
NEW THERAPEUTICALLY USEFUL COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF DERIVATIVES OF PIPERAZINE OF THE GENERAL FORMULA:
Claim 3
Dependent Claim
55 words
A PROCESS FOR THE PRODUCTION OF NEW THERAPEUTICALLY USEFUL PIPERAZINE DERIVATIVES WHICH COMPRISES CONDENSING A SULPHONYL HALIDE OF THE TYPE R-SO2-X WITH AN N-R1-PIPERIZINE, R REPRESENTING AN ALKYL RADICAL CONTAINING FROM 1 TO 4 CARBON ATOMS AND R1 REPRESENTING AN ALKYL RADICAL CONTAINING NOT MORE THAN 3 CARBON ATOMS AND X REPRESENTING A HALOGEN ATOM.
Claim 4
Dependent Claim
55 words
A PROCESS FOR THE PRODUCTION OF NEW THERAPEUTICALLY USEFUL PIPERAZINE DERIVATIVES WHICH COMPRISES CONDENSING A SULPHONYL HALIDE OF THE TYPE R-SO2-X WITH AN N-R1-PIPERIZINE, R REPRESENTING AN ALKYL RADICAL CONTAINING FROM 1 TO 4 CARBON ATOMS AND R1 REPRESENTING AN ALKYL RADICAL CONTAINING NOT MORE THAN 3 CARBON ATOMS AND X REPRESENTING A HALOGEN ATOM.
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) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |