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US3577425A Expired / Lapsed US ⏱️ 0.0 years remaining

8-(1,4-benzodioxan-2-ylmethyl)-3-oxo-1-thia-4,8-diazaspiro(4,5)decanes

Assignee: Tanabe Pharma Corp
•
Filing: 1968-12-10
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Granted: 1971-05-04
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Expires: 1988-12-10
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Abstract

Abstract BENZODIOXANE DERIVATIVES OF THE FORMULA 2-((4-(A2-Z-),4-(R2-N(-C=O)-)-PIPERIDIN-1-YL-)-A1-),R1- 1,4-BENZODIOXAN AND PHARMACEUTICALLY ACCEPTABLE SALTS THEREOF, WHEREIN R1 IS H, CL, METHYL OR METHOXY, R2 IS H, ALKYL OF 1 TO 4 CARBON ATOMS, BENZYL, PHENYL OR SUBSTITUTED PHENYL IN WHICH THE SUBSTITUENT IS SELECTED FROM THE GROUP CONSISTING OF CL, METHYL METHOXY AND TRIFLUOROMETHYL, A1 IS -CH2-, -CH2CH2-, -CO- OR -CH2CO- THE CARBONYL PORTION OF WHICH IS BOUND TO THE N ATOM OF THE PIPERIDINE RING OR -CH(OH)-CH2- THE METHYLENE (-CH2-) PORTION, OF WHICH IS BOUND TO THE N ATOM OF THE PIPERIDINE RING, A2 IS -CH2-, OR =CHCH3, AND Z IS -S-, -SO- OR -SO2-, ARE VASODILATORS OF LOW TOXICITY IN MAMMALS.

Inventors

  • 👤 Michio Nakanishi
  • 👤 Katsuo Arimura
  • 👤 Hiroshi Imamura
  • 👤 Toshihiro Kobayakawa

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 13:51
CPC Classifications
C; C07; C07D; C07D513/00; C07D513/02; C07D513/10

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) 1974-05-03 1974-11-02 1975-05-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-03 1978-11-02 1979-05-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-03 1982-11-02 1983-05-04 $7700.00 Window Closed / Lapsed

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