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Expired Canadian patentCanada

N-chloro-carbonyl-amino carboxylic esters, process for producing same and its use

CA 1184177 A · Owner: Degussa Aktiengesellschaft · Inventors: Kleemann, Axel; Drauz, Karlheinz

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Abstract From the Canadian patent

The present invention provides N-chloro-carbonylamino carboxylic esters having the general formula (I), wherein X = -CH2- or -S-, R1 represents a straight-chain or branched alkyl radical containing up to 4 carbon atoms R2, R3 and R4, each independently represents hydrogen or a methyl radical, R5 represents hydrogen, an alkyl radical which is, either unsubstituted or substituted by substituents stable against phosgene, or all aromatic or heteroaromatic radical which is either unsubstituted or substituted by substituents stable against phosgene, or R4 and R5 together represent an alkylene radical containing 4 to 5 carbon atoms and 1 m and n, independently of each other, each represents 0 1 or …

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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 March 19, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 19, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 17, 1982
GrantedMarch 19, 1985
Term endedMarch 19, 2002
Patent numberCA 1184177 A
Classification (IPC)C07D207/16 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 17, 1982Patent grantedMarch 19, 1985Term endedMarch 19, 2002

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