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Expired Canadian patentCanada

R(-)-10,11-alkylenedioxy-n-alkylnorapomorphine

CA 1270253 C · Owner: Northeastern University · Inventors: Neumeyer, John L.

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Abstract From the Canadian patent

of Disclosure, A method for providing orally effective aporphine compounds, and new compounds which are orally effective in the prevention and treatment of duodenal ulcers and in the treatment of neurological and psychiatric disorders having the following formula, wherein R1 is lower alkyl substituted lower alkyl, cycloalkyl, substituted cycloalkyl lower alkenyl, substituted lower alkenyl lower alkynyl, substituted lower alkynyl phenyl lower alkyl, phenyl lower alkenyl and phenyl lower alkynyl R2 and R3 are, hydrogen, methyl, lower alkyl substituted lower alkyl, cyclo-, alkyl substituted cycloalkyl, lower alkenyl, substituted lower alkenyl, lower alkynyl, substituted lower alkynyl phenyl …

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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 June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 17, 1982
GrantedJune 12, 1990
Term endedJune 12, 2007
Patent numberCA 1270253 C
Classification (IPC)C07D491/05 +2 more

Timeline

Timeline From CIPO dates

198319861989199219951998200120042007Application filedJune 17, 1982Patent grantedJune 12, 1990Term endedJune 12, 2007

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