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Expired Canadian patentCanada

3-(ureidocyclohexylamino)-propane-1,2-diol- derivatives

CA 1215711 A · Owner: Ciba-Geigy Investments Ltd. · Inventors: Werner, Lincoln H.; Ford, Neville

CIPO record

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Abstract From the Canadian patent

3-(Ureidocyclohexylamino)-propane-1,2-diol-derivatives Abstract of the disclosure, The invention concerns antihypertensive and cardiocative compounds of the formula I, (I), wherein Ar represents a (monocyclic or optionally partially hydrogenated bicyclic) carbocyclic or heterocyclic optionally substituted aromatic radical; R represents hydrogen alkanoyl or aroyl; R1 and, R2 represent independently hydrogen or lower alkyl; or R1 and R2 combined represent alkylene of 2 to 7 carbon atoms separating the two nitrogen atoms thereto attached by 2 to 4 carbon atoms; R3 and R4 independently are hydrogen or lower alkyl; and X represents oxo (O) or thio (S); and salts thereof. They are prepared for …

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted December 23, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 23, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 26, 1983
GrantedDecember 23, 1986
Term endedDecember 23, 2003
Patent numberCA 1215711 A
Classification (IPC)C07D233/30 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedMay 26, 1983Patent grantedDec 23, 1986Term endedDec 23, 2003

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.