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US3637759A Expired / Lapsed US ⏱️ 0.0 years remaining

Chromanes

Assignee: Spofa Vereinigte Pharma Werke
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Filing: 1969-07-30
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Granted: 1972-01-25
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Expires: 1989-07-30
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Abstract

Abstract NOVEL CHROMANE DERIVATIVES CHARACTERIZED BY CARDIOVASCULAR ACTIVITY HAVING THE FOLLOWING FORMULA: 2-R,2-R1,5,7,8-TRI(CH3-),6-((-X-X1-)>N-CH2-CH(-OH)-CH2-O-) CHROMAN WHEREIN R REPRESENTS HYDROGEN OR STRAIGHT OR BRANCHES CHAIN ALKYL HAVING FROM 1 TO 16 CARBON ATOMS, R1 REPRESENTS HYDROGEN OR METHYL, X1 REPRESENTS HYDROGEN, ALKY HAVING 1 TO 8 CARBON ATOMS OR ARALKYL HAVING UP TO 8 CARBON ATOMS, X REPRESENTS HYDROGEN, ALKYL HAVING 1 TO 12 CARBON ATOMS, ARYL HAVING UP TO 12 CARBON ATOMS, ARALKYL HAVING UP TO 12 CARBON ATOMS OR CYCLOALKYL HAVING UP TO 12 CARBON ATOMS, WHEREIN X1 AND X, POSSIBLY TOGETTHER WITH A -C-C-C, -C-O-C-OR -C-N-C- LINKAGE CAN, TAKEN TOGETHER WITH THE NITROGEN ATOM TO WHICH THEY ARE ATTACHED FORM A HETEROCYCLIC RING, AND THE PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS.

Inventors

  • 👤 Jaroslav Weichet
  • 👤 Jarmila Hodorova
  • 👤 Vaclav Trcka
  • 👤 Ludvik Blaha
  • 👤 Antonin Dlabac

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 15:17
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C07D311/70; C07D311/72

Claims Analysis

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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) 1975-01-24 1975-07-26 1976-01-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-24 1979-07-26 1980-01-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-24 1983-07-26 1984-01-25 $7700.00 Window Closed / Lapsed

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