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US3686167A Expired / Lapsed US ⏱️ 0.0 years remaining

Benzazocine derivatives

Assignee: Takeda Pharmaceutical Co Ltd
•
Filing: 1969-02-10
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Granted: 1972-08-22
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Expires: 1989-02-10
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Abstract

Abstract BENZAZOCINE DERIVATIVES OF THE FORMULA: 3-R4,6,6-DI(R2-),(R1)M-1,2,3,4,5,6-HEXAHYDRO-3-BENZAZOCINE WHEREIN R1 REPRESENTS METHOXY, HYDROXY, OR AN ACYLOXY GROUP, WITH THE PROVISO THAT TWO R1 GROUPS MAY TOGETHER FORM A ALKYLENEDIOXY GROUP, M IS AM INTEGER OF 1 TO 3, EACH R2 REPRESENTS AN ALKYL GROUP HAVING AT MOST 4 CARBON ATOMS, AND R4 STANDS FOR HYDROGEN, AN ALIPHATIC OR CYCLOALIPHATIC GROUP HAVING AT MOST 6 CARBON ATOMS, AN ARALKYL GROUP HAVING UP TO 10 CARBON ATOMS, AN ALKYLAMINOCARBONYLALKYL OR MONO-OR DI-ALKYLAMINOALKYL GROUP WHEREIN THE ALKYL HAS AT MOST 3 CARBON ATOMS, ALKYLCARBONYL OF UP TO 5 CARBON ATOMS, CYCLOPROPYLCARBONYL, BENZOYL, PHENYLACETYL, TOSSYL OR TETRAHYDROFURFURYL GROUP, ARE NON-NARCOTIC ANALGESIC COMPOUNDS.

Inventors

  • 👤 Hajime Fujimura
  • 👤 Mikio Hori
  • 👤 Toru Masuda
  • 👤 Yoichi Sawa
  • 👤 Takeshi Kato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 09:52
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/04; C07D307/10; C07D307/14

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) 1975-08-22 1976-02-21 1976-08-22 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-22 1980-02-21 1980-08-22 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-22 1984-02-21 1984-08-22 $7700.00 Window Closed / Lapsed

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