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US3812134A Expired / Lapsed US ⏱️ 0.0 years remaining

4beta-alkoxy-4alpha-(3'-hydroxyphenyl)-3alpha,5alpha-propanopiperidine derivatives

Assignee: Sankyo Co Ltd
•
Filing: 1972-11-08
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Granted: 1974-05-21
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Expires: 1992-11-08
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Abstract

Abstract 4B-ALKOXY-4A-(3'' - HYDROXYPHENYL) - 3A,5A - PROPHANOPIPERIDINE DERIVATIVES HAVING THE FORMULA 3-R1,9-(R-O-),9-(3-(R2-O-)PHENYL)-3-AZABICYCLO(3.3.1)- NONANE WHEREIN R REPRESENTS AN ALKYL GROUP HAVING 1-5 CARBON ATOMS, R1 REPRESENTS AN ALKYL GROUP HAVING 1-5 CARBON ATOMS OR A PHENYLALKYL GROUP HAVING 1-5 CARBON ATOMS IN THE ALKYL MOIETY AND R2 REPRESENTS HYDROGEN ATOM OR AN ALKYLGROUP HAVING 1-5 CARBON ATOMS. THE PIPERIDINE DERIVATIVES ARE USEFUL AS ANALGESICS AND ANTITUSSIVES AND PREPARED BY REACTING 4B (OR A)-HYDROXY-4A ( OR B)-(3-'' HYDROXYPHENYL) - 3A,5A- PROPANOPIPERIDINE DERIVATIVE HAVING THE FORMULA 3-R1,9-(3-(R2''-O-)PHENYL)-3-AZABICYCLO(3.3.1)NONAN-9-OL WHEREIN R1 IS THE SAME AS ABOVE AND R2'' REPRESENTS R2 OR AN ALKOXYALKYL GROUP HAVING 1-5 CARBON ATOMS IN EACH ALKYL MOIETY WITH AN ALKANOL HAVING THE FORMULA R-OH WHEREIN R IS THE SAME AS ABOVE IN THE PRESENCE OF AN ACID.

Inventors

  • 👤 I Iwai
  • 👤 E Ohki
  • 👤 S Oida
  • 👤 H Takagi
  • 👤 Y Ohashi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-08 01:29
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/22

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) 1977-05-20 1977-11-19 1978-05-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-05-20 1981-11-19 1982-05-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-05-20 1985-11-19 1986-05-21 $7700.00 Window Closed / Lapsed

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