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US3647809A Expired / Lapsed US ⏱️ 0.0 years remaining

Certain pyridyl-1 2 4-oxadiazole derivatives

Assignee: Chinoin Private Co Ltd
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Filing: 1969-04-08
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Granted: 1972-03-07
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Expires: 1989-04-08
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Abstract

Abstract A 1,2,4-OXADIAZOLE FOR USE AS A PHARMACEUTICALLY ACTIVE AGENT WITH SPASMOLYTIC, ANTIPYRETIC, ANALGESIC, HYPNOTIC OR ANTIRHEUMATIC PROPERTIES. THE COMPOUND IS OF THE FORMULA 3-R1,5-R2-1,2,4-OXADIAZOLE WHEREIN R1 CONSISTS OF 2-PYRIDYL, 3-PYRIDYL OR 4-PYRIDYL UNSUBSTITUTED OR SUBSTITUTED WITH AN ALKYL GROUP HAVING 1 TO 6 CARBON ATOMS, AND WHEREIN R2 IS PHENYL, HALOPHENYL AMINOPHENYL, HYDROXYPHENYL OR CHLOROPHENOXYMETHYL. THE APPLICATION ALSO DISCLOSES THE HYDROCHLORIDE, HYDROBROMIDE, SULFATE, PHOSPHATE, MALEATE, LACTATE, ACETATE OR TARTARATE ACID-ADDITION SALT OF THE 1,2,4-OXADIAZOLE AND ITS ALKYHALOGENIDE-QUATERNIZED OR ALKYLSULFATEQUATERENIZED PHARMACEUTICALLY ACCEPTABLE SALT WHEREIN THE ALKYL GROUP OF THE QUATERNIZING COMPOUND CONTAINS 1 TO 6 CARBON ATOMS.

Inventors

  • 👤 Kalman Harsanyi Jozsef Reiter
  • 👤 Dezso Korbonits
  • 👤 Csaba Gonczi
  • 👤 Kalman Takacs
  • 👤 Erzsebet Bako
  • 👤 Gyorgy Leszkovszky
  • 👤 Laszlo Tardos
  • 👤 Csaba Vertesy

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:27
CPC Classifications
C; C07; C07D; C07D413/00; C07D413/02; C07D413/04; C07D271/00; C07D271/02; C07D271/06

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-03-07 1975-09-06 1976-03-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-03-07 1979-09-06 1980-03-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-03-07 1983-09-06 1984-03-07 $7700.00 Window Closed / Lapsed

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